diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7d555d30b..f19c63fda0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#3881](https://github.com/plotly/dash/pull/3881) Fix components rendered as props (eg. `dcc.Dropdown` option labels, `dcc.Tab` labels) crashing or failing to update when the host subtree was replaced by a callback; out-of-tree `ExternalWrapper` components now re-insert themselves and update in place.
 - [#3929](https://github.com/plotly/dash/issues/3929) Fix components that set their own initial state on mount (eg. `dash-bootstrap-components` `Tabs`) not applying it on first render, because descendant layout hashes were reset on the first fresh render (regression introduced in 4.2.0 by [#3570](https://github.com/plotly/dash/pull/3570)).
 - [#3948](https://github.com/plotly/dash/issues/3948) Fix page getting progressively slower as callbacks append children
+- [#4009](https://github.com/plotly/dash/issues/4009) Disable autocomplete in DatePickerSingle and DatePickerRange inputs.
 - [#3002](https://github.com/plotly/dash/issues/3002) Fix page loads failing with a 500 error on Windows when Dash is imported from an extended-length (`\\?\`) path, as in JupyterLab Desktop. Package resource paths are now joined with the OS separator instead of `/`.
 
 ## [4.4.1] - 2026-07-21
diff --git a/components/dash-core-components/src/fragments/DatePickerRange.tsx b/components/dash-core-components/src/fragments/DatePickerRange.tsx
index 2b118014e9..0989e662b7 100644
--- a/components/dash-core-components/src/fragments/DatePickerRange.tsx
+++ b/components/dash-core-components/src/fragments/DatePickerRange.tsx
@@ -405,6 +405,7 @@ const DatePickerRange = ({
                             disabled={disabled}
                             dir={direction}
                             aria-label={start_date_placeholder_text}
+                            autoComplete="off"
                         />
                         <ArrowIcon className="dash-datepicker-range-arrow" />
                         <AutosizeInput
@@ -427,6 +428,7 @@ const DatePickerRange = ({
                             disabled={disabled}
                             dir={direction}
                             aria-label={end_date_placeholder_text}
+                            autoComplete="off"
                         />
                         {clearable && !disabled && (
                             <a
diff --git a/components/dash-core-components/src/fragments/DatePickerSingle.tsx b/components/dash-core-components/src/fragments/DatePickerSingle.tsx
index f572ed629d..e91e964d65 100644
--- a/components/dash-core-components/src/fragments/DatePickerSingle.tsx
+++ b/components/dash-core-components/src/fragments/DatePickerSingle.tsx
@@ -204,6 +204,7 @@ const DatePickerSingle = ({
                             disabled={disabled}
                             dir={direction}
                             aria-label={placeholder}
+                            autoComplete="off"
                         />
                         {clearable && !disabled && !!date && (
                             <a