diff --git a/packages/react-native/ReactCommon/cxxreact/ErrorUtils.h b/packages/react-native/ReactCommon/cxxreact/ErrorUtils.h
index 89603e628a7..bb08c4894a0 100644
--- a/packages/react-native/ReactCommon/cxxreact/ErrorUtils.h
+++ b/packages/react-native/ReactCommon/cxxreact/ErrorUtils.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <jsi/jsi.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/cxxreact/SharedProxyCxxModule.h b/packages/react-native/ReactCommon/cxxreact/SharedProxyCxxModule.h
index cb607d3ca5b..858f9b7f325 100644
--- a/packages/react-native/ReactCommon/cxxreact/SharedProxyCxxModule.h
+++ b/packages/react-native/ReactCommon/cxxreact/SharedProxyCxxModule.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <memory>
 
 #include <cxxreact/CxxModule.h>
diff --git a/packages/react-native/ReactCommon/react/debug/react_native_assert.h b/packages/react-native/ReactCommon/react/debug/react_native_assert.h
index 5f4036486bd..1d399d45421 100644
--- a/packages/react-native/ReactCommon/react/debug/react_native_assert.h
+++ b/packages/react-native/ReactCommon/react/debug/react_native_assert.h
@@ -18,6 +18,8 @@
 // For recoverable conditions that can be violated by user mistake (e.g. JS
 // code passes an unexpected prop value), consider react_native_expect instead.
 
+#pragma once
+
 #include "flags.h"
 
 #undef react_native_assert
diff --git a/packages/react-native/ReactCommon/react/debug/react_native_expect.h b/packages/react-native/ReactCommon/react/debug/react_native_expect.h
index 45656664101..cfc4d66f8da 100644
--- a/packages/react-native/ReactCommon/react/debug/react_native_expect.h
+++ b/packages/react-native/ReactCommon/react/debug/react_native_expect.h
@@ -20,6 +20,8 @@
 // will see a helpful diagnostic (beyond a low level log). That concern is the
 // caller's responsibility.
 
+#pragma once
+
 #include "flags.h"
 
 #undef react_native_expect
diff --git a/packages/react-native/ReactCommon/react/renderer/animations/conversions.h b/packages/react-native/ReactCommon/react/renderer/animations/conversions.h
index 70f24860403..34a0957c650 100644
--- a/packages/react-native/ReactCommon/react/renderer/animations/conversions.h
+++ b/packages/react-native/ReactCommon/react/renderer/animations/conversions.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <glog/logging.h>
 #include <react/renderer/animations/primitives.h>
 
diff --git a/packages/react-native/ReactCommon/react/renderer/components/image/ImageProps.h b/packages/react-native/ReactCommon/react/renderer/components/image/ImageProps.h
index 0909b49bff2..3cb643a8d5e 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/image/ImageProps.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/image/ImageProps.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <react/renderer/components/view/ViewProps.h>
 #include <react/renderer/core/PropsParserContext.h>
 #include <react/renderer/graphics/Color.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/components/progressbar/android/react/renderer/components/progressbar/conversions.h b/packages/react-native/ReactCommon/react/renderer/components/progressbar/android/react/renderer/components/progressbar/conversions.h
index fdfbe9fc523..843755a8fa5 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/progressbar/android/react/renderer/components/progressbar/conversions.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/progressbar/android/react/renderer/components/progressbar/conversions.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <folly/dynamic.h>
 #include <react/renderer/components/rncore/Props.h>
 #include <react/renderer/core/propsConversions.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/components/text/conversions.h b/packages/react-native/ReactCommon/react/renderer/components/text/conversions.h
index f9002441c91..b9af7534475 100644
--- a/packages/react-native/ReactCommon/react/renderer/components/text/conversions.h
+++ b/packages/react-native/ReactCommon/react/renderer/components/text/conversions.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <folly/dynamic.h>
 #include <react/renderer/attributedstring/conversions.h>
 #include <react/renderer/components/text/ParagraphState.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/ErrorUtils.h b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/ErrorUtils.h
index a73bb52ce3c..c15de49aac6 100644
--- a/packages/react-native/ReactCommon/react/renderer/runtimescheduler/ErrorUtils.h
+++ b/packages/react-native/ReactCommon/react/renderer/runtimescheduler/ErrorUtils.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <jsi/jsi.h>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/renderer/scheduler/AsynchronousEventBeat.h b/packages/react-native/ReactCommon/react/renderer/scheduler/AsynchronousEventBeat.h
index 3c8dfa068b9..af877980b00 100644
--- a/packages/react-native/ReactCommon/react/renderer/scheduler/AsynchronousEventBeat.h
+++ b/packages/react-native/ReactCommon/react/renderer/scheduler/AsynchronousEventBeat.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <ReactCommon/RuntimeExecutor.h>
 #include <react/renderer/core/EventBeat.h>
 #include <react/utils/RunLoopObserver.h>
diff --git a/packages/react-native/ReactCommon/react/renderer/scheduler/InspectorData.h b/packages/react-native/ReactCommon/react/renderer/scheduler/InspectorData.h
index 1a0b1523adf..d420c0329eb 100644
--- a/packages/react-native/ReactCommon/react/renderer/scheduler/InspectorData.h
+++ b/packages/react-native/ReactCommon/react/renderer/scheduler/InspectorData.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <vector>
 
 namespace facebook::react {
diff --git a/packages/react-native/ReactCommon/react/runtime/BridgelessJSCallInvoker.h b/packages/react-native/ReactCommon/react/runtime/BridgelessJSCallInvoker.h
index bfab788da2f..b6308c4169c 100644
--- a/packages/react-native/ReactCommon/react/runtime/BridgelessJSCallInvoker.h
+++ b/packages/react-native/ReactCommon/react/runtime/BridgelessJSCallInvoker.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <ReactCommon/CallInvoker.h>
 #include <ReactCommon/RuntimeExecutor.h>
 #include <functional>
diff --git a/packages/react-native/ReactCommon/react/runtime/BridgelessNativeMethodCallInvoker.h b/packages/react-native/ReactCommon/react/runtime/BridgelessNativeMethodCallInvoker.h
index 79f922976e1..952a48427ef 100644
--- a/packages/react-native/ReactCommon/react/runtime/BridgelessNativeMethodCallInvoker.h
+++ b/packages/react-native/ReactCommon/react/runtime/BridgelessNativeMethodCallInvoker.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <ReactCommon/CallInvoker.h>
 #include <cxxreact/MessageQueueThread.h>
 #include <functional>
diff --git a/packages/react-native/ReactCommon/react/runtime/BufferedRuntimeExecutor.h b/packages/react-native/ReactCommon/react/runtime/BufferedRuntimeExecutor.h
index 99a6a5352cf..17d3b3aff16 100644
--- a/packages/react-native/ReactCommon/react/runtime/BufferedRuntimeExecutor.h
+++ b/packages/react-native/ReactCommon/react/runtime/BufferedRuntimeExecutor.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <ReactCommon/RuntimeExecutor.h>
 #include <jsi/jsi.h>
 #include <atomic>
diff --git a/packages/react-native/ReactCommon/react/utils/SimpleThreadSafeCache.h b/packages/react-native/ReactCommon/react/utils/SimpleThreadSafeCache.h
index a0855f68433..c5cd6e4bfa6 100644
--- a/packages/react-native/ReactCommon/react/utils/SimpleThreadSafeCache.h
+++ b/packages/react-native/ReactCommon/react/utils/SimpleThreadSafeCache.h
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#pragma once
+
 #include <functional>
 #include <memory>
 #include <mutex>