diff --git a/.changeset/blue-maps-reply.md b/.changeset/blue-maps-reply.md
new file mode 100644
index 00000000000..867d67650c6
--- /dev/null
+++ b/.changeset/blue-maps-reply.md
@@ -0,0 +1,5 @@
+---
+'@primer/react': minor
+---
+
+ActionBar: Add `ActionBar.Menu` subcomponent
diff --git a/packages/react/src/ActionBar/ActionBar.docs.json b/packages/react/src/ActionBar/ActionBar.docs.json
index 28496ced5a9..193a73ba7b3 100644
--- a/packages/react/src/ActionBar/ActionBar.docs.json
+++ b/packages/react/src/ActionBar/ActionBar.docs.json
@@ -100,6 +100,35 @@
           "defaultValue": ""
         }
       ]
+    },
+    {
+      "name": "ActionBar.Menu",
+      "props": [
+        {
+          "name": "aria-label",
+          "type": "string",
+          "required": true,
+          "description": "Accessible label for the menu button."
+        },
+        {
+          "name": "icon",
+          "type": "Component",
+          "required": true,
+          "description": "Icon for the menu button."
+        },
+        {
+          "name": "items",
+          "type": "ActionBarMenuItemProps[]",
+          "required": true,
+          "description": "Array of menu items to render in the menu. Each item can be an action, group, or divider."
+        },
+        {
+          "name": "overflowIcon",
+          "type": "Component | 'none'",
+          "required": false,
+          "description": "Icon displayed when the menu item is within the overflow menu. If 'none' is provided, no icon will be shown in the overflow menu."
+        }
+      ]
     }
   ]
 }
diff --git a/packages/react/src/ActionBar/ActionBar.examples.stories.tsx b/packages/react/src/ActionBar/ActionBar.examples.stories.tsx
index 0f0a3e36abe..6ef573c6341 100644
--- a/packages/react/src/ActionBar/ActionBar.examples.stories.tsx
+++ b/packages/react/src/ActionBar/ActionBar.examples.stories.tsx
@@ -17,12 +17,16 @@ import {
   TasklistIcon,
   ReplyIcon,
   ThreeBarsIcon,
+  TrashIcon,
+  KebabHorizontalIcon,
+  NoteIcon,
 } from '@primer/octicons-react'
 import {Button, Avatar, ActionMenu, IconButton, ActionList, Textarea} from '..'
 import {Dialog} from '../deprecated/DialogV1'
 import {Divider} from '../deprecated/ActionList/Divider'
 import mockData from '../experimental/SelectPanel2/mock-story-data'
 import classes from './ActionBar.examples.stories.module.css'
+import type {ActionBarMenuItemProps} from './ActionBar'
 
 export default {
   title: 'Experimental/Components/ActionBar/Examples',
@@ -312,3 +316,69 @@ export const MultipleActionBars = () => {
     </div>
   )
 }
+
+const ActionMenuExample = () => {
+  return (
+    <ActionBar.Menu
+      aria-label="File options"
+      icon={NoteIcon}
+      items={[
+        {label: 'Download', onClick: () => alert('Download clicked')},
+        {label: 'Jump to line', onClick: () => alert('Jump to line clicked')},
+        {label: 'Find in file', onClick: () => alert('Find in file clicked')},
+        {label: 'Copy path', onClick: () => alert('Copy path clicked')},
+        {label: 'Copy permalink', onClick: () => alert('Copy permalink clicked')},
+        {type: 'divider'},
+        {
+          label: 'Delete file',
+          onClick: () => alert('Delete file clicked'),
+          leadingVisual: TrashIcon,
+          variant: 'danger',
+        },
+      ]}
+    />
+  )
+}
+
+const menuHeadings: ActionBarMenuItemProps = {
+  label: 'Headings',
+  items: [
+    {label: 'Heading 1', onClick: () => alert('Heading 1 clicked'), trailingVisual: '⌘ 1'},
+    {label: 'Heading 2', onClick: () => alert('Heading 2 clicked'), trailingVisual: '⌘ 2'},
+    {label: 'Heading 3', onClick: () => alert('Heading 3 clicked'), trailingVisual: '⌘ 3'},
+    {label: 'Heading 4', onClick: () => alert('Heading 4 clicked'), trailingVisual: '⌘ 4'},
+    {label: 'Heading 5', onClick: () => alert('Heading 5 clicked'), trailingVisual: '⌘ 5'},
+    {label: 'Heading 6', onClick: () => alert('Heading 6 clicked'), trailingVisual: '⌘ 6'},
+    {type: 'divider'},
+    {label: 'Remove heading', onClick: () => alert('Remove heading clicked'), disabled: true},
+  ],
+}
+
+export const WithMenus = () => (
+  <ActionBar aria-label="Toolbar">
+    <ActionBar.IconButton icon={ItalicIcon} aria-label="Italic"></ActionBar.IconButton>
+    <ActionBar.IconButton icon={CodeIcon} aria-label="Code"></ActionBar.IconButton>
+    <ActionBar.IconButton icon={LinkIcon} aria-label="Link"></ActionBar.IconButton>
+    <ActionBar.Divider />
+    <ActionBar.IconButton icon={FileAddedIcon} aria-label="File Added"></ActionBar.IconButton>
+    <ActionBar.IconButton icon={SearchIcon} aria-label="Search"></ActionBar.IconButton>
+
+    <ActionBar.IconButton disabled icon={FileAddedIcon} aria-label="File Added"></ActionBar.IconButton>
+    <ActionBar.IconButton disabled icon={SearchIcon} aria-label="Search"></ActionBar.IconButton>
+    <ActionBar.IconButton disabled icon={QuoteIcon} aria-label="Insert Quote"></ActionBar.IconButton>
+    <ActionBar.IconButton icon={ListUnorderedIcon} aria-label="Unordered List"></ActionBar.IconButton>
+    <ActionBar.IconButton icon={ListOrderedIcon} aria-label="Ordered List"></ActionBar.IconButton>
+    <ActionMenuExample />
+    <ActionBar.IconButton icon={TasklistIcon} aria-label="Task List"></ActionBar.IconButton>
+    <ActionBar.Menu
+      aria-label="Formatting"
+      icon={KebabHorizontalIcon}
+      overflowIcon="none"
+      items={[
+        {label: 'Bold', onClick: () => alert('Bold clicked')},
+        {label: 'Underline', onClick: () => alert('Underline clicked')},
+        menuHeadings,
+      ]}
+    />
+  </ActionBar>
+)
diff --git a/packages/react/src/ActionBar/ActionBar.tsx b/packages/react/src/ActionBar/ActionBar.tsx
index 7046dc44984..61353f2c351 100644
--- a/packages/react/src/ActionBar/ActionBar.tsx
+++ b/packages/react/src/ActionBar/ActionBar.tsx
@@ -1,7 +1,7 @@
 import type {RefObject, MouseEventHandler} from 'react'
 import React, {useState, useCallback, useRef, forwardRef, useId} from 'react'
 import {KebabHorizontalIcon} from '@primer/octicons-react'
-import {ActionList} from '../ActionList'
+import {ActionList, type ActionListItemProps} from '../ActionList'
 import useIsomorphicLayoutEffect from '../utils/useIsomorphicLayoutEffect'
 import {useOnEscapePress} from '../hooks/useOnEscapePress'
 import type {ResizeObserverEntry} from '../hooks/useResizeObserver'
@@ -28,8 +28,14 @@ type ChildProps =
       width: number
       groupId?: string
     }
-  | {type: 'divider'; width: number}
-  | {type: 'group'; width: number}
+  | {type: 'divider' | 'group'; width: number}
+  | {
+      type: 'menu'
+      width: number
+      label: string
+      icon: ActionBarIconButtonProps['icon'] | 'none'
+      items: ActionBarMenuProps['items']
+    }
 
 /**
  * Registry of descendants to render in the list or menu. To preserve insertion order across updates, children are
@@ -100,6 +106,57 @@ export type ActionBarProps = {
 
 export type ActionBarIconButtonProps = {disabled?: boolean} & IconButtonProps
 
+export type ActionBarMenuItemProps =
+  | ({
+      /**
+       * Type of menu item to be rendered in the menu (action | group).
+       * Defaults to 'action' if not specified.
+       */
+      type?: 'action'
+      /**
+       * Whether the menu item is disabled.
+       * All interactions will be prevented if true.
+       */
+      disabled?: boolean
+      /**
+       * Leading visual rendered for the menu item.
+       */
+      leadingVisual?: ActionBarIconButtonProps['icon']
+      /**
+       * Trailing visual rendered for the menu item.
+       */
+      trailingVisual?: ActionBarIconButtonProps['icon'] | string
+      /**
+       * Label for the menu item.
+       */
+      label: string
+      /**
+       * Callback fired when the menu item is selected.
+       */
+      onClick?: ActionListItemProps['onSelect']
+      /**
+       * Nested menu items to render within a submenu.
+       * If provided, the menu item will render a submenu.
+       */
+      items?: ActionBarMenuItemProps[]
+    } & Pick<ActionListItemProps, 'variant'>)
+  | {
+      type: 'divider'
+    }
+
+export type ActionBarMenuProps = {
+  /** Accessible label for the menu button */
+  'aria-label': string
+  /** Icon for the menu button */
+  icon: ActionBarIconButtonProps['icon']
+  items: ActionBarMenuItemProps[]
+  /**
+   * Icon displayed when the menu item is overflowing.
+   * If 'none' is provided, no icon will be shown in the overflow menu.
+   */
+  overflowIcon?: ActionBarIconButtonProps['icon'] | 'none'
+} & IconButtonProps
+
 const MORE_BTN_WIDTH = 32
 
 const calculatePossibleItems = (
@@ -123,6 +180,55 @@ const calculatePossibleItems = (
   return breakpoint
 }
 
+const renderMenuItem = (item: ActionBarMenuItemProps, index: number): React.ReactNode => {
+  if (item.type === 'divider') {
+    return <ActionList.Divider key={index} />
+  }
+
+  const {label, onClick, disabled, trailingVisual: TrailingIcon, leadingVisual: LeadingIcon, items, variant} = item
+
+  if (items && items.length > 0) {
+    return (
+      <ActionMenu key={label}>
+        <ActionMenu.Anchor>
+          <ActionList.Item disabled={disabled} variant={variant}>
+            {LeadingIcon ? (
+              <ActionList.LeadingVisual>
+                <LeadingIcon />
+              </ActionList.LeadingVisual>
+            ) : null}
+            {label}
+            {TrailingIcon ? (
+              <ActionList.TrailingVisual>
+                {typeof TrailingIcon === 'string' ? <span>{TrailingIcon}</span> : <TrailingIcon />}
+              </ActionList.TrailingVisual>
+            ) : null}
+          </ActionList.Item>
+        </ActionMenu.Anchor>
+        <ActionMenu.Overlay>
+          <ActionList>{items.map((subItem, subIndex) => renderMenuItem(subItem, subIndex))}</ActionList>
+        </ActionMenu.Overlay>
+      </ActionMenu>
+    )
+  }
+
+  return (
+    <ActionList.Item key={label} onSelect={onClick} disabled={disabled} variant={variant}>
+      {LeadingIcon ? (
+        <ActionList.LeadingVisual>
+          <LeadingIcon />
+        </ActionList.LeadingVisual>
+      ) : null}
+      {label}
+      {TrailingIcon ? (
+        <ActionList.TrailingVisual>
+          {typeof TrailingIcon === 'string' ? <span>{TrailingIcon}</span> : <TrailingIcon />}
+        </ActionList.TrailingVisual>
+      ) : null}
+    </ActionList.Item>
+  )
+}
+
 const getMenuItems = (
   navWidth: number,
   moreMenuWidth: number,
@@ -320,6 +426,29 @@ export const ActionBar: React.FC<React.PropsWithChildren<ActionBarProps>> = prop
                       )
                     }
 
+                    if (menuItem.type === 'menu') {
+                      const menuItems = menuItem.items
+                      const {icon: Icon, label} = menuItem
+
+                      return (
+                        <ActionMenu key={id}>
+                          <ActionMenu.Anchor>
+                            <ActionList.Item>
+                              {Icon !== 'none' ? (
+                                <ActionList.LeadingVisual>
+                                  <Icon />
+                                </ActionList.LeadingVisual>
+                              ) : null}
+                              {label}
+                            </ActionList.Item>
+                          </ActionMenu.Anchor>
+                          <ActionMenu.Overlay>
+                            <ActionList>{menuItems.map((item, index) => renderMenuItem(item, index))}</ActionList>
+                          </ActionMenu.Overlay>
+                        </ActionMenu>
+                      )
+                    }
+
                     // Use the memoized map instead of filtering each time
                     const groupedMenuItems = groupedItems.get(id) || []
 
@@ -430,7 +559,7 @@ export const ActionBarGroup = forwardRef(({children}: React.PropsWithChildren, f
   const id = useId()
   const {registerChild, unregisterChild} = React.useContext(ActionBarContext)
 
-  // Like IconButton, we store the width in a ref ensures we don't forget about it when not visible
+  // Like IconButton, we store the width in a ref to ensure that we don't forget about it when not visible
   // If a child has a groupId, it won't be visible if the group isn't visible, so we don't need to check isVisibleChild here
   const widthRef = useRef<number>()
 
@@ -455,6 +584,52 @@ export const ActionBarGroup = forwardRef(({children}: React.PropsWithChildren, f
   )
 })
 
+export const ActionBarMenu = forwardRef(
+  ({'aria-label': ariaLabel, icon, overflowIcon, items, ...props}: ActionBarMenuProps, forwardedRef) => {
+    const backupRef = useRef<HTMLButtonElement>(null)
+    const ref = (forwardedRef ?? backupRef) as RefObject<HTMLButtonElement>
+    const id = useId()
+    const {registerChild, unregisterChild, isVisibleChild} = React.useContext(ActionBarContext)
+
+    const [menuOpen, setMenuOpen] = useState(false)
+
+    // Like IconButton, we store the width in a ref to ensure that we don't forget about it when not visible
+    const widthRef = useRef<number>()
+
+    useIsomorphicLayoutEffect(() => {
+      const width = ref.current?.getBoundingClientRect().width
+      if (width) widthRef.current = width
+
+      if (!widthRef.current) return
+
+      registerChild(id, {
+        type: 'menu',
+        width: widthRef.current,
+        label: ariaLabel,
+        icon: overflowIcon ? overflowIcon : icon,
+        items,
+      })
+
+      return () => {
+        unregisterChild(id)
+      }
+    }, [registerChild, unregisterChild, ariaLabel, overflowIcon, icon, items])
+
+    if (!isVisibleChild(id)) return null
+
+    return (
+      <ActionMenu anchorRef={ref} open={menuOpen} onOpenChange={setMenuOpen}>
+        <ActionMenu.Anchor>
+          <IconButton variant="invisible" aria-label={ariaLabel} icon={icon} {...props} />
+        </ActionMenu.Anchor>
+        <ActionMenu.Overlay>
+          <ActionList>{items.map((item, index) => renderMenuItem(item, index))}</ActionList>
+        </ActionMenu.Overlay>
+      </ActionMenu>
+    )
+  },
+)
+
 export const VerticalDivider = () => {
   const ref = useRef<HTMLDivElement>(null)
   const id = useId()
diff --git a/packages/react/src/ActionBar/index.ts b/packages/react/src/ActionBar/index.ts
index 68db283a292..9a7e78b503b 100644
--- a/packages/react/src/ActionBar/index.ts
+++ b/packages/react/src/ActionBar/index.ts
@@ -1,10 +1,11 @@
-import {ActionBar as Bar, ActionBarIconButton, VerticalDivider, ActionBarGroup} from './ActionBar'
-export type {ActionBarProps} from './ActionBar'
+import {ActionBar as Bar, ActionBarIconButton, VerticalDivider, ActionBarGroup, ActionBarMenu} from './ActionBar'
+export type {ActionBarProps, ActionBarMenuProps, ActionBarMenuItemProps} from './ActionBar'
 
 const ActionBar = Object.assign(Bar, {
   IconButton: ActionBarIconButton,
   Divider: VerticalDivider,
   Group: ActionBarGroup,
+  Menu: ActionBarMenu,
 })
 
 export default ActionBar
diff --git a/packages/react/src/__tests__/__snapshots__/exports.test.ts.snap b/packages/react/src/__tests__/__snapshots__/exports.test.ts.snap
index db884036c2a..d141a1f9e64 100644
--- a/packages/react/src/__tests__/__snapshots__/exports.test.ts.snap
+++ b/packages/react/src/__tests__/__snapshots__/exports.test.ts.snap
@@ -267,6 +267,8 @@ exports[`@primer/react/deprecated > should not update exports without a semver c
 exports[`@primer/react/experimental > should not update exports without a semver change 1`] = `
 [
   "ActionBar",
+  "type ActionBarMenuItemProps",
+  "type ActionBarMenuProps",
   "type ActionBarProps",
   "Announce",
   "type AnnounceProps",