diff --git a/src/main/java/apu/saerok_admin/infra/notification/AdminNotificationClient.java b/src/main/java/apu/saerok_admin/infra/notification/AdminNotificationClient.java
new file mode 100644
index 0000000..a455e37
--- /dev/null
+++ b/src/main/java/apu/saerok_admin/infra/notification/AdminNotificationClient.java
@@ -0,0 +1,45 @@
+package apu.saerok_admin.infra.notification;
+
+import apu.saerok_admin.infra.SaerokApiProps;
+import apu.saerok_admin.infra.notification.dto.AdminSendMessageRequest;
+import java.net.URI;
+import java.util.List;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.util.UriBuilder;
+
+@Component
+public class AdminNotificationClient {
+
+    private static final String[] ADMIN_NOTIFICATIONS_SEGMENTS = {"admin", "notifications"};
+
+    private final RestClient saerokRestClient;
+    private final String[] missingPrefixSegments;
+
+    public AdminNotificationClient(RestClient saerokRestClient, SaerokApiProps saerokApiProps) {
+        this.saerokRestClient = saerokRestClient;
+        List<String> missing = saerokApiProps.missingPrefixSegments();
+        this.missingPrefixSegments = missing.toArray(new String[0]);
+    }
+
+    public void sendMessage(AdminSendMessageRequest request) {
+        saerokRestClient.post()
+                .uri(uriBuilder -> buildUri(uriBuilder, "messages"))
+                .contentType(MediaType.APPLICATION_JSON)
+                .body(request)
+                .retrieve()
+                .toBodilessEntity();
+    }
+
+    private URI buildUri(UriBuilder builder, String... segments) {
+        if (missingPrefixSegments.length > 0) {
+            builder.pathSegment(missingPrefixSegments);
+        }
+        builder.pathSegment(ADMIN_NOTIFICATIONS_SEGMENTS);
+        if (segments != null && segments.length > 0) {
+            builder.pathSegment(segments);
+        }
+        return builder.build();
+    }
+}
diff --git a/src/main/java/apu/saerok_admin/infra/notification/dto/AdminSendMessageRequest.java b/src/main/java/apu/saerok_admin/infra/notification/dto/AdminSendMessageRequest.java
new file mode 100644
index 0000000..b0daf0c
--- /dev/null
+++ b/src/main/java/apu/saerok_admin/infra/notification/dto/AdminSendMessageRequest.java
@@ -0,0 +1,10 @@
+package apu.saerok_admin.infra.notification.dto;
+
+import java.util.List;
+
+public record AdminSendMessageRequest(
+        List<Long> userIds,
+        String title,
+        String body
+) {
+}
diff --git a/src/main/java/apu/saerok_admin/infra/user/AdminUserClient.java b/src/main/java/apu/saerok_admin/infra/user/AdminUserClient.java
new file mode 100644
index 0000000..f615453
--- /dev/null
+++ b/src/main/java/apu/saerok_admin/infra/user/AdminUserClient.java
@@ -0,0 +1,50 @@
+package apu.saerok_admin.infra.user;
+
+import apu.saerok_admin.infra.SaerokApiProps;
+import apu.saerok_admin.infra.user.dto.AdminUserListResponse;
+import java.net.URI;
+import java.util.List;
+import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
+import org.springframework.web.client.RestClient;
+import org.springframework.web.util.UriBuilder;
+
+@Component
+public class AdminUserClient {
+
+    private static final String[] ADMIN_USERS_SEGMENTS = {"admin", "users"};
+
+    private final RestClient saerokRestClient;
+    private final String[] missingPrefixSegments;
+
+    public AdminUserClient(RestClient saerokRestClient, SaerokApiProps saerokApiProps) {
+        this.saerokRestClient = saerokRestClient;
+        List<String> missing = saerokApiProps.missingPrefixSegments();
+        this.missingPrefixSegments = missing.toArray(new String[0]);
+    }
+
+    public AdminUserListResponse listUsers(String query, int page, int size) {
+        AdminUserListResponse response = saerokRestClient.get()
+                .uri(uriBuilder -> buildUri(uriBuilder, query, page, size))
+                .retrieve()
+                .body(AdminUserListResponse.class);
+
+        if (response == null) {
+            throw new IllegalStateException("Empty response from admin user API");
+        }
+        return response;
+    }
+
+    private URI buildUri(UriBuilder builder, String query, int page, int size) {
+        if (missingPrefixSegments.length > 0) {
+            builder.pathSegment(missingPrefixSegments);
+        }
+        builder.pathSegment(ADMIN_USERS_SEGMENTS);
+        if (StringUtils.hasText(query)) {
+            builder.queryParam("q", query.trim());
+        }
+        builder.queryParam("page", page);
+        builder.queryParam("size", size);
+        return builder.build();
+    }
+}
diff --git a/src/main/java/apu/saerok_admin/infra/user/dto/AdminUserListResponse.java b/src/main/java/apu/saerok_admin/infra/user/dto/AdminUserListResponse.java
new file mode 100644
index 0000000..414a356
--- /dev/null
+++ b/src/main/java/apu/saerok_admin/infra/user/dto/AdminUserListResponse.java
@@ -0,0 +1,18 @@
+package apu.saerok_admin.infra.user.dto;
+
+import java.util.List;
+
+public record AdminUserListResponse(
+        List<Item> users,
+        int page,
+        int size,
+        long totalElements,
+        int totalPages
+) {
+
+    public record Item(
+            Long id,
+            String nickname
+    ) {
+    }
+}
diff --git a/src/main/java/apu/saerok_admin/web/AdminAuditLogController.java b/src/main/java/apu/saerok_admin/web/AdminAuditLogController.java
index 659f815..7b87c27 100644
--- a/src/main/java/apu/saerok_admin/web/AdminAuditLogController.java
+++ b/src/main/java/apu/saerok_admin/web/AdminAuditLogController.java
@@ -45,17 +45,25 @@ public class AdminAuditLogController {
             Map.entry("AD_PLACEMENT_DELETED", new ActionPresentation("광고 스케줄 삭제", "광고 스케줄을 삭제했습니다.", "text-bg-danger")),
             Map.entry("ANNOUNCEMENT_CREATED", new ActionPresentation("공지 등록", "새 공지를 등록했습니다.", "text-bg-success")),
             Map.entry("ANNOUNCEMENT_UPDATED", new ActionPresentation("공지 수정", "공지 내용을 수정했습니다.", "text-bg-info")),
-            Map.entry("ANNOUNCEMENT_DELETED", new ActionPresentation("공지 삭제", "공지를 삭제했습니다.", "text-bg-danger"))
+            Map.entry("ANNOUNCEMENT_DELETED", new ActionPresentation("공지 삭제", "공지를 삭제했습니다.", "text-bg-danger")),
+            Map.entry("FREEBOARD_POST_DELETED", new ActionPresentation("게시글 삭제", "신고된 자유게시판 게시글을 삭제했습니다.", "text-bg-danger")),
+            Map.entry("FREEBOARD_COMMENT_DELETED", new ActionPresentation("게시판 댓글 삭제", "신고된 자유게시판 댓글을 삭제했습니다.", "text-bg-danger")),
+            Map.entry("ADMIN_MESSAGE_SENT", new ActionPresentation("대상 공지 발송", "특정 사용자에게 관리자 메시지를 발송했습니다.", "text-bg-primary"))
     );
     private static final Map<String, String> TARGET_LABELS = Map.ofEntries(
             Map.entry("REPORT_COLLECTION", "새록 신고"),
             Map.entry("REPORT_COMMENT", "댓글 신고"),
+            Map.entry("REPORT_FREEBOARD_POST", "자유게시판 게시글 신고"),
+            Map.entry("REPORT_FREEBOARD_COMMENT", "자유게시판 댓글 신고"),
             Map.entry("COLLECTION", "새록"),
             Map.entry("COMMENT", "댓글"),
+            Map.entry("FREEBOARD_POST", "자유게시판 게시글"),
+            Map.entry("FREEBOARD_COMMENT", "자유게시판 댓글"),
             Map.entry("AD", "광고"),
             Map.entry("SLOT", "광고 위치"),
             Map.entry("AD_PLACEMENT", "광고 스케줄"),
-            Map.entry("ANNOUNCEMENT", "공지")
+            Map.entry("ANNOUNCEMENT", "공지"),
+            Map.entry("ADMIN_MESSAGE", "관리자 메시지")
     );
     private static final String UNKNOWN_ACTION_LABEL = "기록되지 않은 작업";
     private static final String UNKNOWN_ACTION_DESCRIPTION = "정의되지 않은 관리자 활동입니다.";
diff --git a/src/main/java/apu/saerok_admin/web/NotificationController.java b/src/main/java/apu/saerok_admin/web/NotificationController.java
index 8dbd574..1d9e127 100644
--- a/src/main/java/apu/saerok_admin/web/NotificationController.java
+++ b/src/main/java/apu/saerok_admin/web/NotificationController.java
@@ -1,36 +1,206 @@
 package apu.saerok_admin.web;
 
+import apu.saerok_admin.infra.notification.AdminNotificationClient;
+import apu.saerok_admin.infra.notification.dto.AdminSendMessageRequest;
+import apu.saerok_admin.infra.user.AdminUserClient;
+import apu.saerok_admin.infra.user.dto.AdminUserListResponse;
 import apu.saerok_admin.web.view.Breadcrumb;
-import apu.saerok_admin.web.view.NotificationTargetOption;
-import apu.saerok_admin.web.view.ToastMessage;
+import apu.saerok_admin.web.view.CurrentAdminProfile;
+import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
+import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestClientResponseException;
+import org.springframework.web.servlet.mvc.support.RedirectAttributes;
 
+@Slf4j
 @Controller
+@RequiredArgsConstructor
 @RequestMapping("/notifications")
 public class NotificationController {
 
+    private static final String PERMISSION_ADMIN_ANNOUNCEMENT_WRITE = "ADMIN_ANNOUNCEMENT_WRITE";
+    private static final int MAX_TITLE_LENGTH = 100;
+    private static final int MAX_BODY_LENGTH = 500;
+
+    private final AdminNotificationClient adminNotificationClient;
+    private final AdminUserClient adminUserClient;
+
     @GetMapping("/compose")
-    public String compose(Model model) {
+    public String compose(@ModelAttribute("currentAdminProfile") CurrentAdminProfile currentAdminProfile,
+                          Model model) {
+        prepareComposeModel(currentAdminProfile, model);
+        if (!model.containsAttribute("form")) {
+            model.addAttribute("form", NotificationMessageForm.empty());
+        }
+        return "notifications/compose";
+    }
+
+    @GetMapping("/users/search")
+    @ResponseBody
+    public ResponseEntity<?> searchUsers(@ModelAttribute("currentAdminProfile") CurrentAdminProfile currentAdminProfile,
+                                         @RequestParam(name = "q", required = false) String query) {
+        if (currentAdminProfile == null || !currentAdminProfile.hasPermission(PERMISSION_ADMIN_ANNOUNCEMENT_WRITE)) {
+            return ResponseEntity.status(HttpStatus.FORBIDDEN)
+                    .body(Map.of("message", "사용자 목록을 조회할 권한이 없습니다."));
+        }
+
+        try {
+            AdminUserListResponse response = adminUserClient.listUsers(query, 1, 10);
+            return ResponseEntity.ok(response);
+        } catch (RestClientResponseException exception) {
+            log.warn("Failed to search admin users. status={}, body={}",
+                    exception.getStatusCode(), exception.getResponseBodyAsString(), exception);
+            return ResponseEntity.status(HttpStatus.BAD_GATEWAY)
+                    .body(Map.of("message", "사용자 목록을 불러오지 못했습니다."));
+        } catch (RestClientException | IllegalStateException exception) {
+            log.warn("Failed to search admin users.", exception);
+            return ResponseEntity.status(HttpStatus.BAD_GATEWAY)
+                    .body(Map.of("message", "사용자 목록을 불러오지 못했습니다."));
+        }
+    }
+
+    @PostMapping("/send")
+    public String send(@ModelAttribute("currentAdminProfile") CurrentAdminProfile currentAdminProfile,
+                       @RequestParam(name = "userIds", required = false) String userIdsRaw,
+                       @RequestParam(name = "title", required = false) String title,
+                       @RequestParam(name = "body", required = false) String body,
+                       RedirectAttributes redirectAttributes) {
+        NotificationMessageForm form = new NotificationMessageForm(
+                nullToEmpty(userIdsRaw),
+                nullToEmpty(title),
+                nullToEmpty(body)
+        );
+
+        if (currentAdminProfile == null || !currentAdminProfile.hasPermission(PERMISSION_ADMIN_ANNOUNCEMENT_WRITE)) {
+            return redirectWithError("대상 공지를 발송할 권한이 없습니다.", form, redirectAttributes);
+        }
+
+        String trimmedTitle = title != null ? title.trim() : "";
+        String trimmedBody = body != null ? body.trim() : "";
+
+        if (!StringUtils.hasText(trimmedTitle) || !StringUtils.hasText(trimmedBody)) {
+            return redirectWithError("제목과 본문을 모두 입력해 주세요.", form, redirectAttributes);
+        }
+        if (trimmedTitle.length() > MAX_TITLE_LENGTH) {
+            return redirectWithError("제목은 100자 이내로 입력해 주세요.", form, redirectAttributes);
+        }
+        if (trimmedBody.length() > MAX_BODY_LENGTH) {
+            return redirectWithError("본문은 500자 이내로 입력해 주세요.", form, redirectAttributes);
+        }
+
+        List<Long> userIds;
+        try {
+            userIds = parseUserIds(userIdsRaw);
+        } catch (IllegalArgumentException exception) {
+            return redirectWithError(exception.getMessage(), form, redirectAttributes);
+        }
+
+        if (userIds.isEmpty()) {
+            return redirectWithError("수신자 사용자 ID를 1개 이상 입력해 주세요.", form, redirectAttributes);
+        }
+
+        try {
+            adminNotificationClient.sendMessage(new AdminSendMessageRequest(userIds, trimmedTitle, trimmedBody));
+            redirectAttributes.addFlashAttribute("flashStatus", "success");
+            redirectAttributes.addFlashAttribute("flashMessage",
+                    userIds.size() + "명에게 대상 공지 발송 요청이 접수되었습니다.");
+        } catch (RestClientResponseException exception) {
+            log.warn("Failed to send admin notification. status={}, body={}",
+                    exception.getStatusCode(), exception.getResponseBodyAsString(), exception);
+            return redirectWithError(resolveFailureMessage(exception), form, redirectAttributes);
+        } catch (RestClientException | IllegalStateException exception) {
+            log.warn("Failed to send admin notification.", exception);
+            return redirectWithError("대상 공지 발송에 실패했습니다. 잠시 후 다시 시도해주세요.", form, redirectAttributes);
+        }
+
+        return "redirect:/notifications/compose";
+    }
+
+    private void prepareComposeModel(CurrentAdminProfile currentAdminProfile, Model model) {
         model.addAttribute("pageTitle", "시스템 알림 발송");
         model.addAttribute("activeMenu", "notifications");
         model.addAttribute("breadcrumbs", List.of(
                 Breadcrumb.of("대시보드", "/"),
-                Breadcrumb.active("시스템 알림")
+                Breadcrumb.active("대상 공지 발송")
         ));
-        model.addAttribute("toastMessages", List.of(
-                ToastMessage.success("toastNotificationPreview", "미리보기 생성", "미리보기가 새 창에서 확인 가능합니다."),
-                ToastMessage.success("toastNotificationSent", "발송 완료", "알림 발송 요청이 접수되었습니다.")
-        ));
-        model.addAttribute("targetOptions", List.of(
-                new NotificationTargetOption("ALL", "전체 사용자", "모든 사용자에게 발송"),
-                new NotificationTargetOption("ACTIVE", "최근 30일 활동", "최근 30일 내 활동한 사용자"),
-                new NotificationTargetOption("PREMIUM", "프리미엄", "프리미엄 구독자 대상"),
-                new NotificationTargetOption("CUSTOM", "조건 직접 설정", "세그먼트 규칙으로 지정")
-        ));
-        return "notifications/compose";
+        model.addAttribute("toastMessages", List.of());
+        model.addAttribute("canSend", currentAdminProfile != null
+                && currentAdminProfile.hasPermission(PERMISSION_ADMIN_ANNOUNCEMENT_WRITE));
+    }
+
+    private String redirectWithError(String message,
+                                     NotificationMessageForm form,
+                                     RedirectAttributes redirectAttributes) {
+        redirectAttributes.addFlashAttribute("flashStatus", "error");
+        redirectAttributes.addFlashAttribute("flashMessage", message);
+        redirectAttributes.addFlashAttribute("form", form);
+        return "redirect:/notifications/compose";
+    }
+
+    private List<Long> parseUserIds(String raw) {
+        if (!StringUtils.hasText(raw)) {
+            return List.of();
+        }
+
+        String[] tokens = raw.trim().split("[,\\s]+");
+        Set<Long> userIds = new LinkedHashSet<>();
+        for (String token : tokens) {
+            if (!StringUtils.hasText(token)) {
+                continue;
+            }
+
+            long userId;
+            try {
+                userId = Long.parseLong(token);
+            } catch (NumberFormatException exception) {
+                throw new IllegalArgumentException("사용자 ID는 숫자로만 입력해 주세요.");
+            }
+
+            if (userId <= 0) {
+                throw new IllegalArgumentException("사용자 ID는 1 이상의 숫자로 입력해 주세요.");
+            }
+            userIds.add(userId);
+        }
+        return List.copyOf(userIds);
+    }
+
+    private String resolveFailureMessage(RestClientResponseException exception) {
+        int statusCode = exception.getStatusCode().value();
+        if (statusCode == 400) {
+            return "발송 요청이 거절되었습니다. 사용자 ID와 메시지 길이를 확인해 주세요.";
+        }
+        if (statusCode == 403) {
+            return "대상 공지를 발송할 권한이 없습니다.";
+        }
+        return "대상 공지 발송에 실패했습니다. 잠시 후 다시 시도해주세요.";
+    }
+
+    private static String nullToEmpty(String value) {
+        return value == null ? "" : value;
+    }
+
+    public record NotificationMessageForm(
+            String userIdsRaw,
+            String title,
+            String body
+    ) {
+        static NotificationMessageForm empty() {
+            return new NotificationMessageForm("", "", "");
+        }
     }
 }
diff --git a/src/main/java/apu/saerok_admin/web/ReportController.java b/src/main/java/apu/saerok_admin/web/ReportController.java
index c748e76..8bc78db 100644
--- a/src/main/java/apu/saerok_admin/web/ReportController.java
+++ b/src/main/java/apu/saerok_admin/web/ReportController.java
@@ -223,7 +223,7 @@ public String deleteCollectionByReport(@PathVariable long reportId,
 
         return performAction(() -> adminReportClient.deleteCollectionByReport(reportId, trimmedReason),
                 reportId,
-                "신고 대상 새록을 삭제했습니다.",
+                "신고 대상 새록을 삭제하고 작성자에게 사유 알림을 요청했습니다.",
                 "신고 대상 새록 삭제에 실패했습니다.",
                 redirect,
                 returnTypes,
@@ -261,7 +261,7 @@ public String deleteCommentByReport(@PathVariable long reportId,
 
         return performAction(() -> adminReportClient.deleteCommentByReport(reportId, trimmedReason),
                 reportId,
-                "신고 대상 댓글을 삭제했습니다.",
+                "신고 대상 댓글을 삭제하고 작성자에게 사유 알림을 요청했습니다.",
                 "신고 대상 댓글 삭제에 실패했습니다.",
                 redirect,
                 returnTypes,
diff --git a/src/main/java/apu/saerok_admin/web/UserController.java b/src/main/java/apu/saerok_admin/web/UserController.java
index fa7874f..3965faa 100644
--- a/src/main/java/apu/saerok_admin/web/UserController.java
+++ b/src/main/java/apu/saerok_admin/web/UserController.java
@@ -1,74 +1,113 @@
 package apu.saerok_admin.web;
 
+import apu.saerok_admin.infra.user.AdminUserClient;
+import apu.saerok_admin.infra.user.dto.AdminUserListResponse;
 import apu.saerok_admin.web.view.Breadcrumb;
-import apu.saerok_admin.web.view.UserActivity;
-import apu.saerok_admin.web.view.UserDetail;
+import apu.saerok_admin.web.view.CurrentAdminProfile;
 import apu.saerok_admin.web.view.UserListItem;
-import apu.saerok_admin.web.view.ToastMessage;
-import java.time.LocalDateTime;
 import java.util.List;
+import java.util.stream.IntStream;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestClientResponseException;
 
+@Slf4j
 @Controller
+@RequiredArgsConstructor
 @RequestMapping("/users")
 public class UserController {
 
+    private static final String PERMISSION_ADMIN_ANNOUNCEMENT_WRITE = "ADMIN_ANNOUNCEMENT_WRITE";
+    private static final int DEFAULT_PAGE = 1;
+    private static final int DEFAULT_SIZE = 20;
+    private static final int MAX_SIZE = 50;
+
+    private final AdminUserClient adminUserClient;
+
     @GetMapping
-    public String list(@RequestParam(required = false) String q,
-                       @RequestParam(required = false) String status,
+    public String list(@ModelAttribute("currentAdminProfile") CurrentAdminProfile currentAdminProfile,
+                       @RequestParam(required = false) String q,
                        @RequestParam(defaultValue = "1") int page,
                        @RequestParam(defaultValue = "20") int size,
                        Model model) {
+        int normalizedPage = normalizePage(page);
+        int normalizedSize = normalizeSize(size);
+        boolean canViewUsers = currentAdminProfile != null
+                && currentAdminProfile.hasPermission(PERMISSION_ADMIN_ANNOUNCEMENT_WRITE);
+
         model.addAttribute("pageTitle", "사용자 관리");
         model.addAttribute("activeMenu", "users");
         model.addAttribute("breadcrumbs", List.of(Breadcrumb.of("대시보드", "/"), Breadcrumb.active("사용자")));
-        model.addAttribute("toastMessages", List.of(
-                ToastMessage.success("toastUserAction", "조치 완료", "사용자 상태를 업데이트했습니다."),
-                ToastMessage.success("toastUserNotify", "알림 발송", "사용자에게 알림을 전송했습니다.")
-        ));
+        model.addAttribute("toastMessages", List.of());
         model.addAttribute("query", q);
-        model.addAttribute("statusFilter", status);
-        model.addAttribute("page", page);
-        model.addAttribute("size", size);
-        model.addAttribute("totalPages", 14);
-        model.addAttribute("totalElements", 512);
-        model.addAttribute("statusOptions", List.of("전체", "정상", "휴면", "차단"));
-        model.addAttribute("users", List.of(
-                new UserListItem(501, "솔바람", "sol@saerok.app", LocalDateTime.now().minusMonths(5), "정상", 48, 2),
-                new UserListItem(502, "별빛여행", "star@saerok.app", LocalDateTime.now().minusMonths(3), "정상", 36, 0),
-                new UserListItem(503, "느린풍경", "slow@saerok.app", LocalDateTime.now().minusMonths(8), "차단", 12, 7),
-                new UserListItem(504, "새벽지기", "dawn@saerok.app", LocalDateTime.now().minusMonths(1), "정상", 18, 1),
-                new UserListItem(505, "이끼정원", "moss@saerok.app", LocalDateTime.now().minusMonths(10), "휴면", 5, 0)
-        ));
+        model.addAttribute("page", normalizedPage);
+        model.addAttribute("size", normalizedSize);
+        model.addAttribute("canViewUsers", canViewUsers);
+
+        if (!canViewUsers) {
+            model.addAttribute("loadError", "사용자 목록을 조회할 권한이 없습니다.");
+            addEmptyUserListModel(model);
+            return "users/list";
+        }
+
+        try {
+            AdminUserListResponse response = adminUserClient.listUsers(q, normalizedPage, normalizedSize);
+            List<UserListItem> users = response.users() == null
+                    ? List.of()
+                    : response.users().stream()
+                    .map(item -> new UserListItem(item.id(), item.nickname()))
+                    .toList();
+
+            model.addAttribute("users", users);
+            model.addAttribute("totalPages", response.totalPages());
+            model.addAttribute("totalElements", response.totalElements());
+            model.addAttribute("pageNumbers", pageNumbers(response.totalPages()));
+            model.addAttribute("loadError", null);
+        } catch (RestClientResponseException exception) {
+            log.warn("Failed to load admin users. status={}, body={}",
+                    exception.getStatusCode(), exception.getResponseBodyAsString(), exception);
+            model.addAttribute("loadError", "사용자 목록을 불러오지 못했습니다. 잠시 후 다시 시도해주세요.");
+            addEmptyUserListModel(model);
+        } catch (RestClientException | IllegalStateException exception) {
+            log.warn("Failed to load admin users.", exception);
+            model.addAttribute("loadError", "사용자 목록을 불러오지 못했습니다. 잠시 후 다시 시도해주세요.");
+            addEmptyUserListModel(model);
+        }
+
         return "users/list";
     }
 
-    @GetMapping("/{id}")
-    public String detail(@PathVariable long id, Model model) {
-        UserDetail detail = new UserDetail(id, "솔바람", "sol@saerok.app", "010-1234-5678", "정상",
-                LocalDateTime.now().minusMonths(5), LocalDateTime.now().minusDays(1), 48, 2,
-                List.of(
-                        new UserActivity("새록", "초여름 갈대밭 일지", LocalDateTime.now().minusDays(1), "공개"),
-                        new UserActivity("댓글", "강변 산책 중 만난 물새들", LocalDateTime.now().minusDays(2), "공개"),
-                        new UserActivity("신고", "댓글 신고 #2041", LocalDateTime.now().minusDays(3), "검토중"),
-                        new UserActivity("새록", "가을철 맹금류 관찰 노트", LocalDateTime.now().minusDays(7), "공개")
-                ));
-        model.addAttribute("pageTitle", "사용자 상세");
-        model.addAttribute("activeMenu", "users");
-        model.addAttribute("breadcrumbs", List.of(
-                Breadcrumb.of("대시보드", "/"),
-                Breadcrumb.of("사용자", "/users"),
-                Breadcrumb.active("#" + id)));
-        model.addAttribute("toastMessages", List.of(
-                ToastMessage.success("toastUserAction", "조치 완료", "사용자 상태를 업데이트했습니다."),
-                ToastMessage.success("toastUserNotify", "알림 발송", "사용자에게 알림을 전송했습니다.")
-        ));
-        model.addAttribute("detail", detail);
-        return "users/detail";
+    private int normalizePage(int page) {
+        return page < 1 ? DEFAULT_PAGE : page;
+    }
+
+    private int normalizeSize(int size) {
+        if (size < 1 || size > MAX_SIZE) {
+            return DEFAULT_SIZE;
+        }
+        return size;
+    }
+
+    private List<Integer> pageNumbers(int totalPages) {
+        if (totalPages <= 0) {
+            return List.of();
+        }
+        return IntStream.rangeClosed(1, totalPages)
+                .boxed()
+                .toList();
+    }
+
+    private void addEmptyUserListModel(Model model) {
+        model.addAttribute("users", List.of());
+        model.addAttribute("totalPages", 0);
+        model.addAttribute("totalElements", 0L);
+        model.addAttribute("pageNumbers", List.of());
     }
 }
diff --git a/src/main/java/apu/saerok_admin/web/view/NotificationTargetOption.java b/src/main/java/apu/saerok_admin/web/view/NotificationTargetOption.java
deleted file mode 100644
index 1515f7f..0000000
--- a/src/main/java/apu/saerok_admin/web/view/NotificationTargetOption.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package apu.saerok_admin.web.view;
-
-public record NotificationTargetOption(String value, String label, String description) {
-}
diff --git a/src/main/java/apu/saerok_admin/web/view/UserListItem.java b/src/main/java/apu/saerok_admin/web/view/UserListItem.java
index 3976470..81130b0 100644
--- a/src/main/java/apu/saerok_admin/web/view/UserListItem.java
+++ b/src/main/java/apu/saerok_admin/web/view/UserListItem.java
@@ -1,7 +1,4 @@
 package apu.saerok_admin.web.view;
 
-import java.time.LocalDateTime;
-
-public record UserListItem(long id, String nickname, String email, LocalDateTime joinedAt,
-                           String status, int postCount, int reportCount) {
+public record UserListItem(long id, String nickname) {
 }
diff --git a/src/main/resources/templates/fragments/_sidebar.html b/src/main/resources/templates/fragments/_sidebar.html
index e90fd8a..95a6428 100644
--- a/src/main/resources/templates/fragments/_sidebar.html
+++ b/src/main/resources/templates/fragments/_sidebar.html
@@ -23,6 +23,10 @@
                 <i class="bi bi-graph-up-arrow"></i>
                 <span>서비스 인사이트</span>
             </a>
+            <a th:href="@{/users}" class="app-sidebar__link" th:classappend="${activeMenu}=='users' ? ' is-active'">
+                <i class="bi bi-people"></i>
+                <span>사용자 목록</span>
+            </a>
             <span class="app-sidebar__link is-disabled upcoming-feature" role="button" tabindex="-1" aria-disabled="true"
                   data-bs-toggle="tooltip" data-bs-placement="right" data-bs-title="추후 제공 예정인 기능">
                 <i class="bi bi-journal-richtext"></i>
@@ -41,6 +45,11 @@
                 <i class="bi bi-megaphone"></i>
                 <span>공지사항 관리</span>
             </a>
+            <a th:href="@{/notifications/compose}" class="app-sidebar__link"
+               th:classappend="${activeMenu}=='notifications' ? ' is-active fw-semibold'">
+                <i class="bi bi-send"></i>
+                <span>대상 공지 발송</span>
+            </a>
             <a th:href="@{/admin/audit-logs}" class="app-sidebar__link"
                th:classappend="${activeMenu}=='adminAuditLogs' ? ' is-active'">
                 <i class="bi bi-clipboard-check"></i>
@@ -81,6 +90,11 @@ <h5 class="offcanvas-title mb-0">새록 어드민</h5>
                     <i class="bi bi-graph-up-arrow"></i>
                     <span>서비스 인사이트</span>
                 </a>
+                <a th:href="@{/users}" class="app-sidebar__link"
+                   th:classappend="${activeMenu}=='users' ? ' is-active fw-semibold'">
+                    <i class="bi bi-people"></i>
+                    <span>사용자 목록</span>
+                </a>
                 <span class="app-sidebar__link is-disabled upcoming-feature" role="button" tabindex="-1" aria-disabled="true"
                       data-bs-toggle="tooltip" data-bs-placement="bottom" data-bs-title="추후 제공 예정인 기능">
                     <i class="bi bi-journal-richtext"></i>
@@ -99,6 +113,11 @@ <h5 class="offcanvas-title mb-0">새록 어드민</h5>
                     <i class="bi bi-megaphone"></i>
                     <span>공지사항 관리</span>
                 </a>
+                <a th:href="@{/notifications/compose}" class="app-sidebar__link"
+                   th:classappend="${activeMenu}=='notifications' ? ' is-active fw-semibold'">
+                    <i class="bi bi-send"></i>
+                    <span>대상 공지 발송</span>
+                </a>
                 <a th:href="@{/admin/audit-logs}" class="app-sidebar__link"
                    th:classappend="${activeMenu}=='adminAuditLogs' ? ' is-active fw-semibold'">
                     <i class="bi bi-clipboard-check"></i>
@@ -115,5 +134,3 @@ <h5 class="offcanvas-title mb-0">새록 어드민</h5>
 </div>
 </body>
 </html>
-
-
diff --git a/src/main/resources/templates/notices/index.html b/src/main/resources/templates/notices/index.html
index 58897c9..49beef4 100644
--- a/src/main/resources/templates/notices/index.html
+++ b/src/main/resources/templates/notices/index.html
@@ -8,6 +8,10 @@ <h1 class="h3 mb-1 fw-semibold">공지사항 관리</h1>
             <p class="text-muted-soft mb-0">앱 공지사항을 작성하고 게시/예약 게시를 관리합니다.</p>
         </div>
         <div class="d-flex align-items-center gap-2">
+            <a th:if="${canWrite}" th:href="@{/notifications/compose}" class="btn btn-outline-primary">
+                <i class="bi bi-send me-1"></i>
+                대상 공지 발송
+            </a>
             <a th:if="${canWrite}" th:href="@{/notices/new}" class="btn btn-primary">
                 <i class="bi bi-pencil-square me-1"></i>
                 공지사항 작성
diff --git a/src/main/resources/templates/notifications/compose.html b/src/main/resources/templates/notifications/compose.html
index 3438eeb..0a87858 100644
--- a/src/main/resources/templates/notifications/compose.html
+++ b/src/main/resources/templates/notifications/compose.html
@@ -2,138 +2,366 @@
 <html lang="ko" xmlns:th="http://www.thymeleaf.org"
       th:replace="~{layout/base :: layout(${pageTitle}, ${activeMenu}, ${breadcrumbs}, ~{::content})}">
 <th:block th:fragment="content">
-        <div class="row g-4">
-            <div class="col-12 col-xl-8">
-                <div class="card card-elevated">
-                    <div class="card-body">
-                        <form class="row g-4">
-                            <div class="col-12">
-                                <label class="form-label fw-semibold">제목</label>
-                                <input type="text" class="form-control form-control-lg" placeholder="예) 새록 주간 소식 안내">
+    <div class="d-flex flex-wrap justify-content-between align-items-center gap-3 mb-4">
+        <div>
+            <h1 class="h3 mb-1 fw-semibold">대상 공지 발송</h1>
+            <p class="text-muted-soft mb-0">닉네임으로 사용자를 선택해 관리자 메시지를 푸시 및 인앱 알림으로 발송합니다.</p>
+        </div>
+        <a th:href="@{/notices}" class="btn btn-outline-secondary d-inline-flex align-items-center gap-1">
+            <i class="bi bi-megaphone"></i>
+            <span>공지사항 관리</span>
+        </a>
+    </div>
+
+    <div th:if="${flashMessage}" class="alert alert-elevated d-flex align-items-center"
+         th:classappend="${flashStatus} == 'success' ? ' alert-success' : ' alert-danger'">
+        <i class="bi"
+           th:classappend="${flashStatus} == 'success' ? ' bi-check-circle-fill me-2' : ' bi-exclamation-triangle-fill me-2'"></i>
+        <span th:text="${flashMessage}">처리가 완료되었습니다.</span>
+    </div>
+
+    <div th:if="${!canSend}" class="alert alert-warning border-0 rounded-4">
+        <div class="fw-semibold mb-1">발송 권한이 없습니다.</div>
+        <div class="small">대상 공지 발송에는 공지사항 작성 권한이 필요합니다.</div>
+    </div>
+
+    <div class="row g-4">
+        <div class="col-12 col-xl-8">
+            <div class="card card-elevated">
+                <div class="card-body card-body-comfy">
+                    <form id="notificationSendForm" class="row g-4" method="post" th:action="@{/notifications/send}"
+                          autocomplete="off" onsubmit="return confirm('입력한 대상에게 공지를 발송할까요?');">
+                        <div class="col-12">
+                            <label class="form-label fw-semibold" for="recipientSearch">수신자 닉네임</label>
+                            <input id="notificationUserIds" name="userIds" type="hidden" th:value="${form.userIdsRaw}">
+                            <div class="position-relative">
+                                <input id="recipientSearch" type="search" class="form-control form-control-lg"
+                                       placeholder="닉네임을 입력해 검색하세요"
+                                       autocomplete="off"
+                                       th:disabled="${!canSend}">
+                                <div id="recipientSuggestions"
+                                     class="list-group position-absolute start-0 end-0 shadow-sm d-none"
+                                     style="z-index: 1050;"></div>
                             </div>
-                            <div class="col-12">
-                                <label class="form-label fw-semibold">본문 내용</label>
-                                <textarea class="form-control" rows="8" placeholder="알림 본문을 입력하세요."></textarea>
-                                <div class="form-text">마크다운 문법을 지원합니다.</div>
+                            <div id="selectedRecipients" class="d-flex flex-wrap gap-2 mt-3"></div>
+                            <div class="form-text">
+                                닉네임 검색 결과에서 사용자를 선택하세요. 중복 선택은 자동으로 제외됩니다.
                             </div>
-                            <div class="col-12">
-                                <label class="form-label fw-semibold">타겟 대상</label>
-                                <div class="list-group">
-                                    <label class="list-group-item list-group-item-action d-flex justify-content-between align-items-start" th:each="option : ${targetOptions}">
-                                        <div class="me-3">
-                                            <div class="form-check">
-                                                <input class="form-check-input" type="radio" name="target" th:value="${option.value()}" th:checked="${option.value() == 'ALL'}">
-                                                <span class="ms-2 fw-semibold" th:text="${option.label()}">전체</span>
-                                            </div>
-                                            <small class="text-muted" th:text="${option.description()}">설명</small>
-                                        </div>
-                                        <span class="badge text-bg-light">예상 1,248명</span>
-                                    </label>
-                                </div>
+                        </div>
+
+                        <div class="col-12">
+                            <label class="form-label fw-semibold" for="notificationTitle">알림 제목</label>
+                            <input id="notificationTitle" name="title" type="text" class="form-control form-control-lg"
+                                   maxlength="100" placeholder="예) 안내 사항"
+                                   th:disabled="${!canSend}" th:value="${form.title}">
+                            <div class="form-text text-end">
+                                <span id="notificationTitleCount">0</span>/100
                             </div>
-                            <div class="col-12">
-                                <label class="form-label fw-semibold">예약 발송</label>
-                                <div class="row g-3 align-items-center">
-                                    <div class="col-md-4">
-                                        <div class="form-check form-switch">
-                                            <input class="form-check-input" type="checkbox" id="scheduleToggle">
-                                            <label class="form-check-label" for="scheduleToggle">예약 발송 사용</label>
-                                        </div>
-                                    </div>
-                                    <div class="col-md-4">
-                                        <input type="date" class="form-control" disabled id="scheduleDate">
-                                    </div>
-                                    <div class="col-md-4">
-                                        <input type="time" class="form-control" disabled id="scheduleTime">
-                                    </div>
-                                </div>
-                                <div class="form-text">예약 발송을 사용하지 않으면 즉시 발송됩니다.</div>
+                        </div>
+
+                        <div class="col-12">
+                            <label class="form-label fw-semibold" for="notificationBody">알림 본문</label>
+                            <textarea id="notificationBody" name="body" class="form-control" rows="7" maxlength="500"
+                                      placeholder="예) 서비스 이용에 참고해 주세요."
+                                      th:disabled="${!canSend}"
+                                      th:text="${form.body}"></textarea>
+                            <div class="form-text text-end">
+                                <span id="notificationBodyCount">0</span>/500
                             </div>
-                        </form>
-                    </div>
-                    <div class="card-footer bg-white border-0 d-flex justify-content-between align-items-center">
-                        <div class="text-muted small">최근 발송: 2024.05.30 · 알림 1,026명 수신</div>
-                        <div class="d-flex gap-2">
-                            <button class="btn btn-outline-secondary" type="button" data-bs-toggle="modal" data-bs-target="#previewModal">미리보기</button>
-                            <button class="btn btn-primary" type="button" data-bs-toggle="modal" data-bs-target="#sendConfirmModal">발송</button>
                         </div>
-                    </div>
-                </div>
-            </div>
-            <div class="col-12 col-xl-4">
-                <div class="card card-elevated mb-4">
-                    <div class="card-body">
-                        <h3 class="h6 fw-semibold mb-3">발송 가이드</h3>
-                        <ul class="list-unstyled small text-muted mb-0">
-                            <li class="mb-2"><i class="bi bi-check2-circle text-success me-2"></i>하루 최대 3회 발송 권장</li>
-                            <li class="mb-2"><i class="bi bi-check2-circle text-success me-2"></i>예약 발송은 최대 30일 이내</li>
-                            <li><i class="bi bi-check2-circle text-success me-2"></i>민감 정보 포함 여부 재검토</li>
-                        </ul>
-                    </div>
-                </div>
-                <div class="card card-elevated">
-                    <div class="card-body">
-                        <h3 class="h6 fw-semibold mb-3">최근 발송 로그</h3>
-                        <ul class="list-unstyled small text-muted mb-0">
-                            <li class="mb-2">2024.05.30 20:00 · 주간 업데이트 · 1,026명</li>
-                            <li class="mb-2">2024.05.28 09:00 · 시스템 점검 안내 · 982명</li>
-                            <li>2024.05.25 18:30 · 신규 기능 소개 · 1,201명</li>
-                        </ul>
-                    </div>
+
+                        <div class="col-12 d-flex justify-content-end">
+                            <button type="submit" class="btn btn-primary d-inline-flex align-items-center gap-1"
+                                    th:disabled="${!canSend}">
+                                <i class="bi bi-send"></i>
+                                <span>대상 공지 발송</span>
+                            </button>
+                        </div>
+                    </form>
                 </div>
             </div>
         </div>
 
-        <div class="modal fade" id="previewModal" tabindex="-1" aria-hidden="true">
-            <div class="modal-dialog modal-lg">
-                <div class="modal-content">
-                    <div class="modal-header">
-                        <h5 class="modal-title">알림 미리보기</h5>
-                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
-                    </div>
-                    <div class="modal-body">
-                        <div class="border rounded-4 p-4 bg-light">
-                            <h4 class="fw-semibold">[미리보기] 새록 주간 소식 안내</h4>
-                            <p class="text-muted">안녕하세요, 새록 운영팀입니다.</p>
-                            <p>이번 주 업데이트와 주요 소식을 안내드립니다. 자세한 내용은 링크를 통해 확인하세요.</p>
-                        </div>
-                    </div>
-                    <div class="modal-footer">
-                        <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">닫기</button>
-                        <button type="button" class="btn btn-primary" data-bs-dismiss="modal" data-toast-target="toastNotificationPreview">미리보기 확인</button>
-                    </div>
+        <div class="col-12 col-xl-4">
+            <div class="card card-elevated mb-4">
+                <div class="card-body card-body-comfy">
+                    <h2 class="h6 fw-semibold mb-3">발송 요약</h2>
+                    <dl class="row gy-3 mb-0">
+                        <dt class="col-5 text-muted small">수신자</dt>
+                        <dd class="col-7 mb-0 fw-semibold"><span id="recipientCount">0</span>명</dd>
+                        <dt class="col-5 text-muted small">ID 목록</dt>
+                        <dd class="col-7 mb-0 text-break" id="recipientPreview">-</dd>
+                    </dl>
                 </div>
             </div>
-        </div>
-        <div class="modal fade" id="sendConfirmModal" tabindex="-1" aria-hidden="true">
-            <div class="modal-dialog">
-                <div class="modal-content">
-                    <div class="modal-header">
-                        <h5 class="modal-title">알림 발송 확인</h5>
-                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
-                    </div>
-                    <div class="modal-body">
-                        <p>선택된 타겟에게 알림을 발송하시겠습니까?</p>
-                        <p class="small text-muted mb-0">발송 후 취소가 불가능하니 메시지를 다시 한번 확인해주세요.</p>
+
+            <div class="card card-elevated">
+                <div class="card-body card-body-comfy">
+                    <h2 class="h6 fw-semibold mb-3">미리보기</h2>
+                    <div class="surface-muted rounded-lg p-3">
+                        <div class="fw-semibold text-break" id="messagePreviewTitle">알림 제목</div>
+                        <div class="text-muted text-break mt-2" id="messagePreviewBody">알림 본문</div>
                     </div>
-                    <div class="modal-footer">
-                        <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">취소</button>
-                        <button type="button" class="btn btn-primary" data-bs-dismiss="modal" data-toast-target="toastNotificationSent">발송</button>
+                    <div class="small text-muted mt-3">
+                        발송 요청이 성공하면 BE에서 대상 사용자별 인앱 알림을 저장하고 푸시를 전송합니다.
                     </div>
                 </div>
             </div>
         </div>
+    </div>
+
     <script>
-    const scheduleToggle = document.getElementById('scheduleToggle');
-    const scheduleDate = document.getElementById('scheduleDate');
-    const scheduleTime = document.getElementById('scheduleTime');
-    if (scheduleToggle) {
-        scheduleToggle.addEventListener('change', () => {
-            const enabled = scheduleToggle.checked;
-            if (scheduleDate) scheduleDate.disabled = !enabled;
-            if (scheduleTime) scheduleTime.disabled = !enabled;
-        });
-    }
+        (function () {
+            function $(id) {
+                return document.getElementById(id);
+            }
+
+            var userIdsEl = $('notificationUserIds');
+            var searchEl = $('recipientSearch');
+            var suggestionsEl = $('recipientSuggestions');
+            var selectedRecipientsEl = $('selectedRecipients');
+            var titleEl = $('notificationTitle');
+            var bodyEl = $('notificationBody');
+            var recipientCountEl = $('recipientCount');
+            var recipientPreviewEl = $('recipientPreview');
+            var previewTitleEl = $('messagePreviewTitle');
+            var previewBodyEl = $('messagePreviewBody');
+            var titleCountEl = $('notificationTitleCount');
+            var bodyCountEl = $('notificationBodyCount');
+            var selectedUsers = parseInitialUsers(userIdsEl ? userIdsEl.value : '');
+            var searchTimer = null;
+            var latestSearchSeq = 0;
+
+            function uniqueIds(raw) {
+                if (!raw || !raw.trim()) {
+                    return [];
+                }
+                var seen = {};
+                return raw.trim().split(/[,\s]+/).filter(function (value) {
+                    if (!value || seen[value]) {
+                        return false;
+                    }
+                    seen[value] = true;
+                    return true;
+                });
+            }
+
+            function parseInitialUsers(raw) {
+                return uniqueIds(raw).map(function (id) {
+                    return {
+                        id: id,
+                        nickname: '#' + id
+                    };
+                });
+            }
+
+            function labelFor(user) {
+                if (!user) {
+                    return '';
+                }
+                if (user.nickname && user.nickname.charAt(0) === '#') {
+                    return user.nickname;
+                }
+                return user.nickname + ' (#' + user.id + ')';
+            }
+
+            function syncSelectedRecipients() {
+                if (userIdsEl) {
+                    userIdsEl.value = selectedUsers.map(function (user) {
+                        return user.id;
+                    }).join(',');
+                }
+                if (!selectedRecipientsEl) {
+                    return;
+                }
+                selectedRecipientsEl.innerHTML = '';
+                if (selectedUsers.length === 0) {
+                    var empty = document.createElement('span');
+                    empty.className = 'text-muted small';
+                    empty.textContent = '선택된 수신자가 없습니다.';
+                    selectedRecipientsEl.appendChild(empty);
+                    return;
+                }
+                selectedUsers.forEach(function (user) {
+                    var chip = document.createElement('span');
+                    chip.className = 'badge rounded-pill text-bg-primary d-inline-flex align-items-center gap-1 px-3 py-2';
+                    chip.textContent = labelFor(user);
+
+                    var removeButton = document.createElement('button');
+                    removeButton.type = 'button';
+                    removeButton.className = 'btn-close btn-close-white ms-1';
+                    removeButton.setAttribute('aria-label', labelFor(user) + ' 제거');
+                    removeButton.addEventListener('click', function () {
+                        selectedUsers = selectedUsers.filter(function (selected) {
+                            return selected.id !== user.id;
+                        });
+                        syncSelectedRecipients();
+                        syncPreview();
+                    });
+                    chip.appendChild(removeButton);
+                    selectedRecipientsEl.appendChild(chip);
+                });
+            }
+
+            function hideSuggestions() {
+                if (!suggestionsEl) {
+                    return;
+                }
+                suggestionsEl.classList.add('d-none');
+                suggestionsEl.innerHTML = '';
+            }
+
+            function showSuggestionMessage(message) {
+                if (!suggestionsEl) {
+                    return;
+                }
+                suggestionsEl.innerHTML = '';
+                var item = document.createElement('div');
+                item.className = 'list-group-item text-muted small';
+                item.textContent = message;
+                suggestionsEl.appendChild(item);
+                suggestionsEl.classList.remove('d-none');
+            }
+
+            function addRecipient(user) {
+                var id = String(user.id);
+                var exists = selectedUsers.some(function (selected) {
+                    return selected.id === id;
+                });
+                if (!exists) {
+                    selectedUsers.push({
+                        id: id,
+                        nickname: user.nickname
+                    });
+                }
+                if (searchEl) {
+                    searchEl.value = '';
+                    searchEl.focus();
+                }
+                hideSuggestions();
+                syncSelectedRecipients();
+                syncPreview();
+            }
+
+            function renderSuggestions(users) {
+                if (!suggestionsEl) {
+                    return;
+                }
+                suggestionsEl.innerHTML = '';
+                var candidates = users.filter(function (user) {
+                    return !selectedUsers.some(function (selected) {
+                        return selected.id === String(user.id);
+                    });
+                });
+                if (candidates.length === 0) {
+                    showSuggestionMessage('검색 결과가 없습니다.');
+                    return;
+                }
+                candidates.forEach(function (user) {
+                    var button = document.createElement('button');
+                    button.type = 'button';
+                    button.className = 'list-group-item list-group-item-action d-flex justify-content-between align-items-center';
+                    button.innerHTML = '<span></span><span class="text-muted small"></span>';
+                    button.querySelector('span:first-child').textContent = user.nickname;
+                    button.querySelector('span:last-child').textContent = '#' + user.id;
+                    button.addEventListener('click', function () {
+                        addRecipient(user);
+                    });
+                    suggestionsEl.appendChild(button);
+                });
+                suggestionsEl.classList.remove('d-none');
+            }
+
+            function searchRecipients(query) {
+                var trimmed = query ? query.trim() : '';
+                if (!trimmed) {
+                    hideSuggestions();
+                    return;
+                }
+                var searchSeq = ++latestSearchSeq;
+                fetch('/notifications/users/search?q=' + encodeURIComponent(trimmed), {
+                    headers: {
+                        'Accept': 'application/json'
+                    },
+                    credentials: 'same-origin'
+                })
+                        .then(function (response) {
+                            if (!response.ok) {
+                                throw new Error('Search failed');
+                            }
+                            return response.json();
+                        })
+                        .then(function (data) {
+                            if (searchSeq !== latestSearchSeq) {
+                                return;
+                            }
+                            renderSuggestions(data && data.users ? data.users : []);
+                        })
+                        .catch(function () {
+                            if (searchSeq === latestSearchSeq) {
+                                showSuggestionMessage('사용자 검색에 실패했습니다.');
+                            }
+                        });
+            }
+
+            function syncPreview() {
+                var recipients = selectedUsers.map(labelFor);
+                var title = titleEl && titleEl.value.trim() ? titleEl.value.trim() : '알림 제목';
+                var body = bodyEl && bodyEl.value.trim() ? bodyEl.value.trim() : '알림 본문';
+
+                if (recipientCountEl) {
+                    recipientCountEl.textContent = selectedUsers.length;
+                }
+                if (recipientPreviewEl) {
+                    recipientPreviewEl.textContent = recipients.length > 0 ? recipients.join(', ') : '-';
+                }
+                if (previewTitleEl) {
+                    previewTitleEl.textContent = title;
+                }
+                if (previewBodyEl) {
+                    previewBodyEl.textContent = body;
+                }
+                if (titleCountEl) {
+                    titleCountEl.textContent = titleEl && titleEl.value ? titleEl.value.length : 0;
+                }
+                if (bodyCountEl) {
+                    bodyCountEl.textContent = bodyEl && bodyEl.value ? bodyEl.value.length : 0;
+                }
+            }
+
+            [userIdsEl, titleEl, bodyEl].forEach(function (element) {
+                if (element) {
+                    element.addEventListener('input', syncPreview);
+                }
+            });
+
+            if (searchEl) {
+                searchEl.addEventListener('input', function () {
+                    window.clearTimeout(searchTimer);
+                    searchTimer = window.setTimeout(function () {
+                        searchRecipients(searchEl.value);
+                    }, 250);
+                });
+                searchEl.addEventListener('keydown', function (event) {
+                    if (event.key === 'Escape') {
+                        hideSuggestions();
+                    }
+                });
+            }
+
+            document.addEventListener('click', function (event) {
+                if (!suggestionsEl || !searchEl) {
+                    return;
+                }
+                if (event.target === searchEl || suggestionsEl.contains(event.target)) {
+                    return;
+                }
+                hideSuggestions();
+            });
+
+            syncSelectedRecipients();
+            syncPreview();
+        })();
     </script>
 </th:block>
 </html>
diff --git a/src/main/resources/templates/reports/delete-modal.html b/src/main/resources/templates/reports/delete-modal.html
index 9326b81..4956e13 100644
--- a/src/main/resources/templates/reports/delete-modal.html
+++ b/src/main/resources/templates/reports/delete-modal.html
@@ -10,10 +10,14 @@ <h5 class="modal-title" id="reportDeleteReasonModalLabel">삭제 사유 입력</
                     <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="닫기"></button>
                 </div>
                 <div class="modal-body">
-                    <p class="mb-3"><span data-delete-target-name>신고 대상 콘텐츠</span>을(를) 삭제하려면 사유를 입력해주세요.</p>
+                    <p class="mb-3">
+                        <span data-delete-target-name>신고 대상 콘텐츠</span>을(를) 삭제하려면 사유를 입력해주세요.
+                        입력한 사유는 작성자에게 알림으로 전달됩니다.
+                    </p>
                     <div class="mb-3">
-                        <label class="form-label" for="reportDeleteReasonInput">삭제 사유</label>
-                        <textarea class="form-control" id="reportDeleteReasonInput" rows="3" placeholder="삭제 사유를 입력하세요."></textarea>
+                        <label class="form-label" for="reportDeleteReasonInput">작성자에게 전달할 삭제 사유</label>
+                        <textarea class="form-control" id="reportDeleteReasonInput" rows="3"
+                                  placeholder="예) 운영정책 위반 내용이 포함되어 삭제되었습니다."></textarea>
                         <div class="invalid-feedback d-block d-none" data-delete-reason-error>삭제 사유를 입력해주세요.</div>
                     </div>
                 </div>
diff --git a/src/main/resources/templates/users/list.html b/src/main/resources/templates/users/list.html
index d8117a6..a0ef221 100644
--- a/src/main/resources/templates/users/list.html
+++ b/src/main/resources/templates/users/list.html
@@ -2,155 +2,87 @@
 <html lang="ko" xmlns:th="http://www.thymeleaf.org"
       th:replace="~{layout/base :: layout(${pageTitle}, ${activeMenu}, ${breadcrumbs}, ~{::content})}">
 <th:block th:fragment="content">
-        <div class="card card-elevated mb-4">
-            <div class="card-body card-body-comfy">
-                <form class="row g-3 align-items-end" method="get">
-                    <div class="col-md-4">
-                        <label class="form-label small text-uppercase text-muted" for="userQuery">검색어</label>
-                        <input type="search" class="form-control" id="userQuery" name="q" placeholder="닉네임 또는 이메일" th:value="${query}">
-                    </div>
-                    <div class="col-md-3">
-                        <label class="form-label small text-uppercase text-muted" for="userStatus">상태</label>
-                        <select class="form-select" id="userStatus" name="status">
-                            <option th:each="option : ${statusOptions}" th:value="${option == '전체' ? '' : option}"
-                                    th:selected="${option == statusFilter || (statusFilter == null && option == '전체')}"
-                                    th:text="${option}">전체</option>
-                        </select>
-                    </div>
-                    <div class="col-md-2 d-flex gap-2">
-                        <button type="submit" class="btn btn-primary flex-grow-1">검색</button>
-                        <a th:href="@{/users}" class="btn btn-outline-secondary">초기화</a>
-                    </div>
-                </form>
-            </div>
+    <div class="d-flex flex-wrap justify-content-between align-items-center gap-3 mb-4">
+        <div>
+            <h1 class="h3 mb-1 fw-semibold">사용자 목록</h1>
+            <p class="text-muted-soft mb-0">대상 공지 발송에 사용할 사용자 ID와 닉네임을 조회합니다.</p>
         </div>
-        <div class="card card-elevated">
-            <div class="table-responsive table-shell">
-                <table class="table table-modern align-middle table-hover">
-                    <thead>
-                    <tr>
-                        <th>ID</th>
-                        <th>닉네임</th>
-                        <th>이메일</th>
-                        <th>가입일</th>
-                        <th>상태</th>
-                        <th>작성/신고</th>
-                        <th class="text-end">액션</th>
-                    </tr>
-                    </thead>
-                    <tbody>
-                    <tr th:each="user : ${users}" th:data-user="${user.nickname()}">
-                        <td class="fw-semibold" th:text="${'#' + user.id()}">#501</td>
-                        <td th:text="${user.nickname()}">솔바람</td>
-                        <td th:text="${user.email()}">sol@saerok.app</td>
-                        <td th:text="${#temporals.format(user.joinedAt(), 'yyyy.MM.dd')}">2024.01.02</td>
-                        <td>
-                            <span class="badge" th:classappend="${user.status()} == '정상' ? ' text-bg-success' : (${user.status()} == '휴면' ? ' text-bg-secondary' : ' text-bg-danger')"
-                                  th:text="${user.status()}">정상</span>
-                        </td>
-                        <td>
-                            <span class="badge text-bg-light">작성 <span th:text="${user.postCount()}">48</span></span>
-                            <span class="badge text-bg-light ms-1">신고 <span th:text="${user.reportCount()}">2</span></span>
-                        </td>
-                        <td class="text-end">
-                            <div class="btn-group btn-group-sm">
-                                <a th:href="@{'/users/' + ${user.id()}}" class="btn btn-outline-secondary">상세</a>
-                                <button class="btn btn-outline-primary" type="button" data-bs-toggle="modal" data-bs-target="#userStatusModal"
-                                        th:attr="data-user='사용자 ' + ${user.nickname()}">상태 변경</button>
-                                <button class="btn btn-outline-success" type="button" data-bs-toggle="modal" data-bs-target="#userNotifyModal"
-                                        th:attr="data-user='사용자 ' + ${user.nickname()}">알림 발송</button>
-                            </div>
-                        </td>
-                    </tr>
-                    </tbody>
-                </table>
-            </div>
-            <div class="card-footer bg-white border-0 py-3">
-                <div class="d-flex justify-content-between align-items-center">
-                    <span class="text-muted small">총 <strong th:text="${totalElements}">512</strong>명 · <strong th:text="${page}">1</strong>/<span th:text="${totalPages}">14</span> 페이지</span>
-                    <ul class="pagination pagination-sm mb-0">
-                        <li class="page-item" th:classappend="${page == 1} ? ' disabled'">
-                            <a class="page-link" th:href="@{/users(page=${page-1 < 1 ? 1 : page-1}, size=${size}, q=${query}, status=${statusFilter})}">이전</a>
-                        </li>
-                        <li class="page-item" th:each="pageNum : ${#numbers.sequence(1, totalPages)}" th:classappend="${pageNum} == ${page} ? ' active'">
-                            <a class="page-link" th:text="${pageNum}" th:href="@{/users(page=${pageNum}, size=${size}, q=${query}, status=${statusFilter})}">1</a>
-                        </li>
-                        <li class="page-item" th:classappend="${page == totalPages} ? ' disabled'">
-                            <a class="page-link" th:href="@{/users(page=${page+1 > totalPages ? totalPages : page+1}, size=${size}, q=${query}, status=${statusFilter})}">다음</a>
-                        </li>
-                    </ul>
+    </div>
+
+    <div th:if="${loadError}" class="alert alert-warning border-0 rounded-4">
+        <div class="fw-semibold mb-1">목록을 불러올 수 없습니다.</div>
+        <div class="small" th:text="${loadError}">사용자 목록을 불러오지 못했습니다.</div>
+    </div>
+
+    <div class="card card-elevated mb-4">
+        <div class="card-body card-body-comfy">
+            <form class="row g-3 align-items-end" method="get">
+                <div class="col-md-5">
+                    <label class="form-label small text-uppercase text-muted" for="userQuery">닉네임 검색</label>
+                    <input type="search" class="form-control" id="userQuery" name="q"
+                           placeholder="닉네임 일부를 입력하세요" th:value="${query}"
+                           th:disabled="${!canViewUsers}">
                 </div>
-            </div>
+                <div class="col-md-2">
+                    <label class="form-label small text-uppercase text-muted" for="userSize">페이지 크기</label>
+                    <select class="form-select" id="userSize" name="size" th:disabled="${!canViewUsers}">
+                        <option value="20" th:selected="${size == 20}">20</option>
+                        <option value="50" th:selected="${size == 50}">50</option>
+                    </select>
+                </div>
+                <div class="col-md-3 d-flex gap-2">
+                    <button type="submit" class="btn btn-primary flex-grow-1" th:disabled="${!canViewUsers}">검색</button>
+                    <a th:href="@{/users}" class="btn btn-outline-secondary">초기화</a>
+                </div>
+            </form>
         </div>
+    </div>
 
-        <div class="modal fade" id="userStatusModal" tabindex="-1" aria-hidden="true">
-            <div class="modal-dialog">
-                <div class="modal-content">
-                    <div class="modal-header">
-                        <h5 class="modal-title">사용자 상태 변경</h5>
-                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
-                    </div>
-                    <div class="modal-body">
-                        <p><strong id="userStatusTarget">사용자</strong>의 상태를 조정합니다.</p>
-                        <select class="form-select">
-                            <option value="정상">정상</option>
-                            <option value="휴면">휴면</option>
-                            <option value="차단">차단</option>
-                        </select>
-                        <div class="mt-3">
-                            <label class="form-label">조치 메모</label>
-                            <textarea class="form-control" rows="3" placeholder="사유를 입력하세요."></textarea>
-                        </div>
-                    </div>
-                    <div class="modal-footer">
-                        <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">취소</button>
-                        <button type="button" class="btn btn-primary" data-bs-dismiss="modal" data-toast-target="toastUserAction">저장</button>
-                    </div>
-                </div>
-            </div>
+    <div class="card card-elevated">
+        <div class="table-responsive table-shell">
+            <table class="table table-modern align-middle table-hover">
+                <thead>
+                <tr>
+                    <th style="width: 180px;">ID</th>
+                    <th>닉네임</th>
+                </tr>
+                </thead>
+                <tbody>
+                <tr th:if="${#lists.isEmpty(users)}">
+                    <td colspan="2" class="text-center text-muted py-5">조회된 사용자가 없습니다.</td>
+                </tr>
+                <tr th:each="user : ${users}">
+                    <td class="fw-semibold" th:text="${'#' + user.id()}">#501</td>
+                    <td th:text="${user.nickname()}">솔바람</td>
+                </tr>
+                </tbody>
+            </table>
         </div>
-        <div class="modal fade" id="userNotifyModal" tabindex="-1" aria-hidden="true">
-            <div class="modal-dialog">
-                <div class="modal-content">
-                    <div class="modal-header">
-                        <h5 class="modal-title">사용자 알림 발송</h5>
-                        <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
-                    </div>
-                    <div class="modal-body">
-                        <p><strong id="userNotifyTarget">사용자</strong>에게 보낼 메시지를 작성하세요.</p>
-                        <div class="mb-3">
-                            <label class="form-label">제목</label>
-                            <input type="text" class="form-control" placeholder="알림 제목">
-                        </div>
-                        <div class="mb-3">
-                            <label class="form-label">내용</label>
-                            <textarea class="form-control" rows="4" placeholder="알림 본문"></textarea>
-                        </div>
-                    </div>
-                    <div class="modal-footer">
-                        <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">취소</button>
-                        <button type="button" class="btn btn-success" data-bs-dismiss="modal" data-toast-target="toastUserNotify">발송</button>
-                    </div>
-                </div>
+        <div class="card-footer bg-white border-0 py-3">
+            <div class="d-flex flex-wrap justify-content-between align-items-center gap-3">
+                <span class="text-muted small">
+                    총 <strong th:text="${totalElements}">0</strong>명
+                    <span th:if="${totalPages > 0}">
+                        · <strong th:text="${page}">1</strong>/<span th:text="${totalPages}">1</span> 페이지
+                    </span>
+                </span>
+                <ul class="pagination pagination-sm mb-0" th:if="${totalPages > 0}">
+                    <li class="page-item" th:classappend="${page == 1} ? ' disabled'">
+                        <a class="page-link"
+                           th:href="@{/users(page=${page - 1 < 1 ? 1 : page - 1}, size=${size}, q=${query})}">이전</a>
+                    </li>
+                    <li class="page-item" th:each="pageNum : ${pageNumbers}"
+                        th:classappend="${pageNum == page} ? ' active'">
+                        <a class="page-link" th:text="${pageNum}"
+                           th:href="@{/users(page=${pageNum}, size=${size}, q=${query})}">1</a>
+                    </li>
+                    <li class="page-item" th:classappend="${page == totalPages} ? ' disabled'">
+                        <a class="page-link"
+                           th:href="@{/users(page=${page + 1 > totalPages ? totalPages : page + 1}, size=${size}, q=${query})}">다음</a>
+                    </li>
+                </ul>
             </div>
         </div>
-    <script>
-        const userStatusModal = document.getElementById('userStatusModal');
-        if (userStatusModal) {
-            userStatusModal.addEventListener('show.bs.modal', event => {
-                const button = event.relatedTarget;
-                const target = button ? button.getAttribute('data-user') : '사용자';
-                userStatusModal.querySelector('#userStatusTarget').textContent = target;
-            });
-        }
-        const userNotifyModal = document.getElementById('userNotifyModal');
-        if (userNotifyModal) {
-            userNotifyModal.addEventListener('show.bs.modal', event => {
-                const button = event.relatedTarget;
-                const target = button ? button.getAttribute('data-user') : '사용자';
-                userNotifyModal.querySelector('#userNotifyTarget').textContent = target;
-            });
-        }
-    </script>
+    </div>
 </th:block>
 </html>
diff --git a/src/test/java/apu/saerok_admin/infra/notification/AdminNotificationClientTest.java b/src/test/java/apu/saerok_admin/infra/notification/AdminNotificationClientTest.java
new file mode 100644
index 0000000..c507df7
--- /dev/null
+++ b/src/test/java/apu/saerok_admin/infra/notification/AdminNotificationClientTest.java
@@ -0,0 +1,62 @@
+package apu.saerok_admin.infra.notification;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.equalToJson;
+import static com.github.tomakehurst.wiremock.client.WireMock.post;
+import static com.github.tomakehurst.wiremock.client.WireMock.postRequestedFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.client.WireMock.verify;
+
+import apu.saerok_admin.infra.SaerokApiProps;
+import apu.saerok_admin.infra.notification.dto.AdminSendMessageRequest;
+import com.github.tomakehurst.wiremock.WireMockServer;
+import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
+import java.util.List;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.web.client.RestClient;
+
+class AdminNotificationClientTest {
+
+    private WireMockServer wireMockServer;
+    private AdminNotificationClient client;
+
+    @BeforeEach
+    void setUp() {
+        wireMockServer = new WireMockServer(WireMockConfiguration.options().dynamicPort());
+        wireMockServer.start();
+        configureFor("localhost", wireMockServer.port());
+
+        RestClient restClient = RestClient.builder()
+                .baseUrl(wireMockServer.baseUrl())
+                .requestFactory(new SimpleClientHttpRequestFactory())
+                .build();
+        client = new AdminNotificationClient(restClient, new SaerokApiProps(wireMockServer.baseUrl(), "/api/v1"));
+    }
+
+    @AfterEach
+    void tearDown() {
+        wireMockServer.stop();
+    }
+
+    @Test
+    void sendMessage_postsToAdminNotificationEndpoint() {
+        stubFor(post(urlEqualTo("/api/v1/admin/notifications/messages"))
+                .willReturn(aResponse().withStatus(204)));
+
+        client.sendMessage(new AdminSendMessageRequest(List.of(501L, 502L), "Notice", "Message body"));
+
+        verify(postRequestedFor(urlEqualTo("/api/v1/admin/notifications/messages"))
+                .withRequestBody(equalToJson("""
+                        {
+                          "userIds": [501, 502],
+                          "title": "Notice",
+                          "body": "Message body"
+                        }
+                        """)));
+    }
+}
diff --git a/src/test/java/apu/saerok_admin/infra/user/AdminUserClientTest.java b/src/test/java/apu/saerok_admin/infra/user/AdminUserClientTest.java
new file mode 100644
index 0000000..e36530f
--- /dev/null
+++ b/src/test/java/apu/saerok_admin/infra/user/AdminUserClientTest.java
@@ -0,0 +1,71 @@
+package apu.saerok_admin.infra.user;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.client.WireMock.verify;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import apu.saerok_admin.infra.SaerokApiProps;
+import apu.saerok_admin.infra.user.dto.AdminUserListResponse;
+import com.github.tomakehurst.wiremock.WireMockServer;
+import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.http.client.SimpleClientHttpRequestFactory;
+import org.springframework.web.client.RestClient;
+
+class AdminUserClientTest {
+
+    private WireMockServer wireMockServer;
+    private AdminUserClient client;
+
+    @BeforeEach
+    void setUp() {
+        wireMockServer = new WireMockServer(WireMockConfiguration.options().dynamicPort());
+        wireMockServer.start();
+        configureFor("localhost", wireMockServer.port());
+
+        RestClient restClient = RestClient.builder()
+                .baseUrl(wireMockServer.baseUrl())
+                .requestFactory(new SimpleClientHttpRequestFactory())
+                .build();
+        client = new AdminUserClient(restClient, new SaerokApiProps(wireMockServer.baseUrl(), "/api/v1"));
+    }
+
+    @AfterEach
+    void tearDown() {
+        wireMockServer.stop();
+    }
+
+    @Test
+    void listUsers_getsAdminUsersEndpoint() {
+        stubFor(get(urlEqualTo("/api/v1/admin/users?q=sol&page=1&size=10"))
+                .willReturn(aResponse()
+                        .withStatus(200)
+                        .withHeader("Content-Type", "application/json")
+                        .withBody("""
+                                {
+                                  "users": [
+                                    { "id": 501, "nickname": "sol" }
+                                  ],
+                                  "page": 1,
+                                  "size": 10,
+                                  "totalElements": 1,
+                                  "totalPages": 1
+                                }
+                                """)));
+
+        AdminUserListResponse response = client.listUsers("sol", 1, 10);
+
+        verify(getRequestedFor(urlEqualTo("/api/v1/admin/users?q=sol&page=1&size=10")));
+        assertThat(response.users()).hasSize(1);
+        assertThat(response.users().getFirst().id()).isEqualTo(501L);
+        assertThat(response.users().getFirst().nickname()).isEqualTo("sol");
+        assertThat(response.totalElements()).isEqualTo(1);
+    }
+}