diff --git a/.changeset/light-colts-burn.md b/.changeset/light-colts-burn.md
new file mode 100644
index 00000000000..d7f2498e493
--- /dev/null
+++ b/.changeset/light-colts-burn.md
@@ -0,0 +1,5 @@
+---
+'@primer/react': major
+---
+
+Remove support for `sx` from `ButtonGroup`
diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-colorblind-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-colorblind-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-dimmed-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-dimmed-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-high-contrast-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-high-contrast-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-tritanopia-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-dark-tritanopia-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-colorblind-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-colorblind-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-high-contrast-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-high-contrast-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-linux.png
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diff --git a/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-tritanopia-linux.png b/.playwright/snapshots/components/ButtonGroup.test.ts-snapshots/ButtonGroup-SX-Prop-light-tritanopia-linux.png
deleted file mode 100644
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diff --git a/e2e/components/ButtonGroup.test.ts b/e2e/components/ButtonGroup.test.ts
index 90be6469460..c04362139d7 100644
--- a/e2e/components/ButtonGroup.test.ts
+++ b/e2e/components/ButtonGroup.test.ts
@@ -23,10 +23,6 @@ const stories = [
     title: 'Overrides',
     id: 'components-buttongroup-dev--link-button-with-icon-buttons',
   },
-  {
-    title: 'SX Prop',
-    id: 'components-buttongroup-dev--sx-prop',
-  },
 ] as const
 
 test.describe('ButtonGroup', () => {
diff --git a/packages/react/src/ButtonGroup/ButtonGroup.dev.stories.tsx b/packages/react/src/ButtonGroup/ButtonGroup.dev.stories.tsx
index 683aac2b2c9..63d427e3a3e 100644
--- a/packages/react/src/ButtonGroup/ButtonGroup.dev.stories.tsx
+++ b/packages/react/src/ButtonGroup/ButtonGroup.dev.stories.tsx
@@ -24,7 +24,7 @@ const meta: Meta<typeof ButtonGroup> = {
 export default meta
 
 export const LinkAndButtonWithTooltip2 = () => (
-  <ButtonGroup sx={{pl: 2}}>
+  <ButtonGroup style={{paddingLeft: '8px'}}>
     <Tooltip text="Additional info about the link">
       <Button as="a" href="https://primer.style">
         Link
@@ -35,7 +35,7 @@ export const LinkAndButtonWithTooltip2 = () => (
 )
 
 export const ButtonAndLinkWithTooltip2 = () => (
-  <ButtonGroup sx={{pl: 2}}>
+  <ButtonGroup style={{paddingLeft: '8px'}}>
     <IconButton icon={CopilotIcon} aria-label="Open GitHub Copilot chat" />
     <Tooltip text="Additional info about the link">
       <Button as="a" href="https://primer.style">
@@ -62,11 +62,3 @@ export const LinkButtonWithIconButtons = () => (
     <IconButton icon={CopilotIcon} aria-label="Open GitHub Copilot chat" />
   </ButtonGroup>
 )
-
-export const SxProp = () => (
-  <ButtonGroup sx={{border: '1px solid red'}}>
-    <Button>Button 1</Button>
-    <Button>Button 2</Button>
-    <Button>Button 3</Button>
-  </ButtonGroup>
-)
diff --git a/packages/react/src/ButtonGroup/ButtonGroup.docs.json b/packages/react/src/ButtonGroup/ButtonGroup.docs.json
index a27208f34c1..e43db4799db 100644
--- a/packages/react/src/ButtonGroup/ButtonGroup.docs.json
+++ b/packages/react/src/ButtonGroup/ButtonGroup.docs.json
@@ -22,11 +22,6 @@
   ],
   "importPath": "@primer/react",
   "props": [
-    {
-      "name": "sx",
-      "type": "SystemStyleObject",
-      "deprecated": true
-    },
     {
       "name": "ref",
       "type": "React.RefObject<HTMLDivElement>"
diff --git a/packages/react/src/ButtonGroup/ButtonGroup.tsx b/packages/react/src/ButtonGroup/ButtonGroup.tsx
index 3793d15df52..cd07d132175 100644
--- a/packages/react/src/ButtonGroup/ButtonGroup.tsx
+++ b/packages/react/src/ButtonGroup/ButtonGroup.tsx
@@ -1,22 +1,19 @@
 import React, {type PropsWithChildren} from 'react'
-import {type SxProp} from '../sx'
 import classes from './ButtonGroup.module.css'
 import {clsx} from 'clsx'
 import {FocusKeys, useFocusZone} from '../hooks/useFocusZone'
 import {useProvidedRefOrCreate} from '../hooks'
 import type {ForwardRefComponent as PolymorphicForwardRefComponent} from '../utils/polymorphic'
-import {BoxWithFallback} from '../internal/components/BoxWithFallback'
 
-export type ButtonGroupProps = {
+export type ButtonGroupProps = PropsWithChildren<{
   /** The role of the group */
   role?: string
   /** className passed in for styling */
   className?: string
-} & PropsWithChildren &
-  SxProp
+}>
 
-const ButtonGroup = React.forwardRef<HTMLElement, ButtonGroupProps>(function ButtonGroup(
-  {children, className, role, ...rest},
+const ButtonGroup = React.forwardRef(function ButtonGroup(
+  {as: BaseComponent = 'div', children, className, role, ...rest},
   forwardRef,
 ) {
   const buttons = React.Children.map(children, (child, index) => <div key={index}>{child}</div>)
@@ -30,9 +27,9 @@ const ButtonGroup = React.forwardRef<HTMLElement, ButtonGroupProps>(function But
   })
 
   return (
-    <BoxWithFallback ref={buttonRef} className={clsx(className, classes.ButtonGroup)} role={role} {...rest}>
+    <BaseComponent ref={buttonRef} className={clsx(className, classes.ButtonGroup)} role={role} {...rest}>
       {buttons}
-    </BoxWithFallback>
+    </BaseComponent>
   )
 }) as PolymorphicForwardRefComponent<'div', ButtonGroupProps>