diff --git a/src/message/__tests__/messageActionSheet-test.js b/src/message/__tests__/messageActionSheet-test.js
index f6e1bc32521..c5804915d70 100644
--- a/src/message/__tests__/messageActionSheet-test.js
+++ b/src/message/__tests__/messageActionSheet-test.js
@@ -6,6 +6,8 @@ import { streamNameOfStreamMessage } from '../../utils/recipient';
 import * as eg from '../../__tests__/lib/exampleData';
 import { constructMessageActionButtons, constructTopicActionButtons } from '../messageActionSheet';
 import { getStreamsById } from '../../selectors';
+import { reducer } from '../../unread/unreadModel';
+import { initialState } from '../../unread/__tests__/unread-testlib';
 
 const baseBackgroundData = deepFreeze({
   alertWords: [],
@@ -65,6 +67,34 @@ describe('constructTopicActionButtons', () => {
   const topic = streamMessage.subject;
   const streamId = streamMessage.stream_id;
 
+  const baseState = (() => {
+    const r = (state, action) => reducer(state, action, eg.plusReduxState);
+    let state = initialState;
+    state = r(state, eg.mkActionEventNewMessage(streamMessage));
+    return state;
+  })();
+
+  test('show mark as read if topic is unread', () => {
+    const unreadStreams = baseState.streams;
+    const buttons = constructTopicActionButtons({
+      backgroundData: { ...baseBackgroundData, unreadStreams },
+      streamName,
+      streamId,
+      topic,
+    });
+    expect(buttonTitles(buttons)).toContain('Mark topic as read');
+  });
+
+  test('do not show mark as read if topic is read', () => {
+    const buttons = constructTopicActionButtons({
+      backgroundData: baseBackgroundData,
+      streamName,
+      streamId,
+      topic,
+    });
+    expect(buttonTitles(buttons)).not.toContain('Mark topic as read');
+  });
+
   test('show Unmute topic option if topic is muted', () => {
     const mute = deepFreeze([[streamName, topic]]);
     const buttons = constructTopicActionButtons({
diff --git a/src/message/messageActionSheet.js b/src/message/messageActionSheet.js
index 19b0aeba6b5..e0d9aabb685 100644
--- a/src/message/messageActionSheet.js
+++ b/src/message/messageActionSheet.js
@@ -121,6 +121,12 @@ const deleteMessage = async ({ auth, message, dispatch }) => {
 deleteMessage.title = 'Delete message';
 deleteMessage.errorMessage = 'Failed to delete message';
 
+const markTopicAsRead = async ({ auth, streamId, topic, subscriptions }) => {
+  await api.markTopicAsRead(auth, streamId, topic);
+};
+markTopicAsRead.title = 'Mark topic as read';
+markTopicAsRead.errorMessage = 'Failed to mark topic as read';
+
 const unmuteTopic = async ({ auth, streamId, topic }) => {
   await api.setTopicMute(auth, streamId, topic, false);
 };
@@ -242,6 +248,10 @@ export const constructTopicActionButtons = ({
   if (ownUser.is_admin) {
     buttons.push(deleteTopic);
   }
+  const unreadCount = unreadStreams.get(streamId)?.get(topic)?.size;
+  if (unreadCount !== undefined && unreadCount > 0) {
+    buttons.push(markTopicAsRead);
+  }
   if (isTopicMuted(streamName, topic, mute)) {
     buttons.push(unmuteTopic);
   } else {
diff --git a/static/translations/messages_en.json b/static/translations/messages_en.json
index c52ffc5f884..7fcda476124 100644
--- a/static/translations/messages_en.json
+++ b/static/translations/messages_en.json
@@ -242,5 +242,6 @@
   "Signed out": "Signed out",
   "Remove account?": "Remove account?",
   "This will make the mobile app on this device forget {email} on {realmUrl}.": "This will make the mobile app on this device forget {email} on {realmUrl}.",
-  "Remove account": "Remove account"
+  "Remove account": "Remove account",
+  "Failed to mark topic as read": "Failed to mark topic as read"
 }