diff --git a/controls/dev/TableView/TableViewAutomationPeer.cpp b/controls/dev/TableView/TableViewAutomationPeer.cpp
index 4cc4c5a4d9..6ba4a6c706 100644
--- a/controls/dev/TableView/TableViewAutomationPeer.cpp
+++ b/controls/dev/TableView/TableViewAutomationPeer.cpp
@@ -5,8 +5,8 @@
 #include "common.h"
 #include "TableView.h"
 #include "TableViewRow.h"
+#include "TableViewColumn.h"
 #include "TableViewAutomationPeer.h"
-#include "TableViewColumnHeaderAutomationPeer.h"
 #include "TableViewCellAutomationPeer.h"
 #include "TableViewAutomationHelpers.h"
 #include "TableViewAutomationPeer.properties.cpp"
@@ -305,8 +305,8 @@ winrt::com_array<winrt::IRawElementProviderSimple> TableViewAutomationPeer::GetC
                 {
                     continue;
                 }
-                // TableView ownership allows pre-realization enumeration but shares RuntimeId.
-                auto headerPeer = winrt::make<TableViewColumnHeaderAutomationPeer>(tableView, column);
+                // TableView ownership allows pre-realization enumeration; the cached peer keeps RuntimeId stable.
+                auto const headerPeer = winrt::get_self<TableViewColumn>(column)->GetOrCreateHeaderAutomationPeerInternal(tableView);
                 headers.push_back(ProviderFromPeer(headerPeer));
             }
         }
diff --git a/controls/dev/TableView/TableViewCellAutomationPeer.cpp b/controls/dev/TableView/TableViewCellAutomationPeer.cpp
index f2ecdb278c..7910fd4204 100644
--- a/controls/dev/TableView/TableViewCellAutomationPeer.cpp
+++ b/controls/dev/TableView/TableViewCellAutomationPeer.cpp
@@ -4,9 +4,9 @@
 #include "pch.h"
 #include "common.h"
 #include "TableView.h"
+#include "TableViewColumn.h"
 #include "TableViewTextColumn.h"
 #include "TableViewRow.h"
-#include "TableViewColumnHeaderAutomationPeer.h"
 #include "TableViewCellAutomationPeer.h"
 #include "TableViewAutomationHelpers.h"
 #include "TableViewCellAutomationPeer.properties.cpp"
@@ -205,7 +205,7 @@ winrt::com_array<winrt::IRawElementProviderSimple> TableViewCellAutomationPeer::
         {
             if (auto const owner = winrt::get_self<TableViewRow>(row)->GetOwningTableView())
             {
-                auto const headerPeer = winrt::make<TableViewColumnHeaderAutomationPeer>(owner, column);
+                auto const headerPeer = winrt::get_self<TableViewColumn>(column)->GetOrCreateHeaderAutomationPeerInternal(owner);
                 headers.push_back(ProviderFromPeer(headerPeer));
             }
         }
diff --git a/controls/dev/TableView/TableViewColumn.cpp b/controls/dev/TableView/TableViewColumn.cpp
index 70b14db3b1..5f79887158 100644
--- a/controls/dev/TableView/TableViewColumn.cpp
+++ b/controls/dev/TableView/TableViewColumn.cpp
@@ -5,6 +5,7 @@
 #include "common.h"
 #include "TableViewColumn.h"
 #include "TableView.h"
+#include "TableViewColumnHeaderAutomationPeer.h"
 
 #include <algorithm>
 #include <cmath>
@@ -291,6 +292,15 @@ void TableViewColumn::NotifyCellContentChanged()
     }
 }
 
+winrt::AutomationPeer TableViewColumn::GetOrCreateHeaderAutomationPeerInternal(winrt::TableView const& owner)
+{
+    if (!m_headerAutomationPeer)
+    {
+        m_headerAutomationPeer = winrt::make<TableViewColumnHeaderAutomationPeer>(owner, *this);
+    }
+    return m_headerAutomationPeer;
+}
+
 bool TableViewColumn::SetOwningTableViewInternal(winrt::TableView const& owner)
 {
     // Keep the owner weak to avoid TableView -> Columns -> Column -> TableView cycles.
@@ -310,6 +320,9 @@ bool TableViewColumn::SetOwningTableViewInternal(winrt::TableView const& owner)
     else
     {
         m_owningTableView = nullptr;
+
+        // The cached peer holds the old owner; drop it so a reattach rebuilds it.
+        m_headerAutomationPeer = nullptr;
         return true;
     }
 }
diff --git a/controls/dev/TableView/TableViewColumn.h b/controls/dev/TableView/TableViewColumn.h
index 52efcb834f..980f38906c 100644
--- a/controls/dev/TableView/TableViewColumn.h
+++ b/controls/dev/TableView/TableViewColumn.h
@@ -64,6 +64,10 @@ class TableViewColumn :
     void ResetDesiredWidthInternal();
     double DesiredWidthInternal() const noexcept { return m_desiredWidth; }
 
+    // Returns this column's header automation peer, cached so the peer instance - and therefore its
+    // UIA RuntimeId - stays stable across enumeration, reorder and virtualization.
+    winrt::AutomationPeer GetOrCreateHeaderAutomationPeerInternal(winrt::TableView const& owner);
+
 private:
     // Write the resolved, clamped width into the read-only ActualWidth DP.
     void UpdateActualWidth();
@@ -72,4 +76,7 @@ class TableViewColumn :
     double m_desiredWidth{ 0.0 };
 
     weak_ref<winrt::TableView> m_owningTableView{ nullptr };
+
+    // Cached header automation peer; see GetOrCreateHeaderAutomationPeerInternal.
+    winrt::AutomationPeer m_headerAutomationPeer{ nullptr };
 };
diff --git a/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.cpp b/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.cpp
index 7e89925f88..5a37217317 100644
--- a/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.cpp
+++ b/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.cpp
@@ -62,11 +62,7 @@ winrt::AutomationControlType TableViewColumnHeaderAutomationPeer::GetAutomationC
 
 int32_t TableViewColumnHeaderAutomationPeer::GetPositionInSetCore()
 {
-    // Every header peer shares the TableView owner, so their auto-generated UIA
-    // RuntimeIds collide (WinUI AutomationPeer has no overridable GetRuntimeIdCore).
-    // Expose the 1-based column position so AT (Narrator) can still distinguish and
-    // announce "column i of n"; combined with the distinct GetNameCore this makes each
-    // header individually identifiable.
+    // 1-based column position so AT can announce "column i of n".
     const auto index = GetColumnIndex();
     return index >= 0 ? index + 1 : -1;
 }
diff --git a/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.h b/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.h
index 54f02dd5ec..2992c62c66 100644
--- a/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.h
+++ b/controls/dev/TableView/TableViewColumnHeaderAutomationPeer.h
@@ -7,8 +7,8 @@
 #include "TableViewColumnHeaderAutomationPeer.g.h"
 
 // UIA peer for a TableView column header; reports header name, type, and bounds.
-// Distinct per-column RuntimeIds are not yet implemented; peers share the TableView
-// owner-derived identity. TableView ownership allows pre-realization enumeration.
+// TableView ownership allows pre-realization enumeration. The peer is cached per column
+// (TableViewColumn::GetOrCreateHeaderAutomationPeerInternal) so its RuntimeId stays stable.
 class TableViewColumnHeaderAutomationPeer :
     public ReferenceTracker<TableViewColumnHeaderAutomationPeer, winrt::implementation::TableViewColumnHeaderAutomationPeerT>
 {
@@ -19,8 +19,7 @@ class TableViewColumnHeaderAutomationPeer :
     hstring GetClassNameCore();
     hstring GetNameCore();
     winrt::AutomationControlType GetAutomationControlTypeCore();
-    // Header peers share the TableView owner, so RuntimeIds currently collide; expose
-    // visible column position so AT can distinguish columns until distinct RuntimeIds are implemented.
+    // PositionInSet/SizeOfSet announce "column i of n" for AT.
     int32_t GetPositionInSetCore();
     int32_t GetSizeOfSetCore();