diff --git a/.changeset/brave-melons-leave.md b/.changeset/brave-melons-leave.md
new file mode 100644
index 00000000000..fb51210bef2
--- /dev/null
+++ b/.changeset/brave-melons-leave.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+TreeView: Add aria-atomic attribute to live region
diff --git a/src/TreeView/TreeView.tsx b/src/TreeView/TreeView.tsx
index 77e0ead2943..3ea37f1bb4a 100644
--- a/src/TreeView/TreeView.tsx
+++ b/src/TreeView/TreeView.tsx
@@ -81,7 +81,7 @@ const Root: React.FC<TreeViewProps> = ({'aria-label': ariaLabel, 'aria-labelledb
   return (
     <RootContext.Provider value={{announceUpdate}}>
       <>
-        <VisuallyHidden role="status" aria-live="polite">
+        <VisuallyHidden role="status" aria-live="polite" aria-atomic="true">
           {ariaLiveMessage}
         </VisuallyHidden>
         <UlBox