diff --git a/app/controllers/api/v1/announcements_controller.rb b/app/controllers/api/v1/announcements_controller.rb
index 6724fac2ec..1e692ff751 100644
--- a/app/controllers/api/v1/announcements_controller.rb
+++ b/app/controllers/api/v1/announcements_controller.rb
@@ -19,11 +19,7 @@ class Api::V1::AnnouncementsController < Api::BaseController
 
   def set_announcements
     @announcements = begin
-      scope = Announcement.published
-
-      scope.merge!(Announcement.without_muted(current_account)) unless truthy_param?(:with_dismissed)
-
-      scope.chronological
+      Announcement.published.chronological
     end
   end
 
diff --git a/app/javascript/mastodon/actions/announcements.js b/app/javascript/mastodon/actions/announcements.js
index f072a407f9..1bdea909f7 100644
--- a/app/javascript/mastodon/actions/announcements.js
+++ b/app/javascript/mastodon/actions/announcements.js
@@ -7,6 +7,10 @@ export const ANNOUNCEMENTS_FETCH_FAIL    = 'ANNOUNCEMENTS_FETCH_FAIL';
 export const ANNOUNCEMENTS_UPDATE        = 'ANNOUNCEMENTS_UPDATE';
 export const ANNOUNCEMENTS_DELETE        = 'ANNOUNCEMENTS_DELETE';
 
+export const ANNOUNCEMENTS_DISMISS_REQUEST = 'ANNOUNCEMENTS_DISMISS_REQUEST';
+export const ANNOUNCEMENTS_DISMISS_SUCCESS = 'ANNOUNCEMENTS_DISMISS_SUCCESS';
+export const ANNOUNCEMENTS_DISMISS_FAIL    = 'ANNOUNCEMENTS_DISMISS_FAIL';
+
 export const ANNOUNCEMENTS_REACTION_ADD_REQUEST = 'ANNOUNCEMENTS_REACTION_ADD_REQUEST';
 export const ANNOUNCEMENTS_REACTION_ADD_SUCCESS = 'ANNOUNCEMENTS_REACTION_ADD_SUCCESS';
 export const ANNOUNCEMENTS_REACTION_ADD_FAIL    = 'ANNOUNCEMENTS_REACTION_ADD_FAIL';
@@ -56,6 +60,32 @@ export const updateAnnouncements = announcement => ({
   announcement: normalizeAnnouncement(announcement),
 });
 
+export const dismissAnnouncement = announcementId => (dispatch, getState) => {
+  dispatch(dismissAnnouncementRequest(announcementId));
+
+  api(getState).post(`/api/v1/announcements/${announcementId}/dismiss`).then(() => {
+    dispatch(dismissAnnouncementSuccess(announcementId));
+  }).catch(error => {
+    dispatch(dismissAnnouncementFail(announcementId, error));
+  });
+};
+
+export const dismissAnnouncementRequest = announcementId => ({
+  type: ANNOUNCEMENTS_DISMISS_REQUEST,
+  id: announcementId,
+});
+
+export const dismissAnnouncementSuccess = announcementId => ({
+  type: ANNOUNCEMENTS_DISMISS_SUCCESS,
+  id: announcementId,
+});
+
+export const dismissAnnouncementFail = (announcementId, error) => ({
+  type: ANNOUNCEMENTS_DISMISS_FAIL,
+  id: announcementId,
+  error,
+});
+
 export const addReaction = (announcementId, name) => (dispatch, getState) => {
   const announcement = getState().getIn(['announcements', 'items']).find(x => x.get('id') === announcementId);
 
diff --git a/app/javascript/mastodon/features/getting_started/components/announcements.js b/app/javascript/mastodon/features/getting_started/components/announcements.js
index cf2abdd768..91cf6215e6 100644
--- a/app/javascript/mastodon/features/getting_started/components/announcements.js
+++ b/app/javascript/mastodon/features/getting_started/components/announcements.js
@@ -302,10 +302,23 @@ class Announcement extends ImmutablePureComponent {
     addReaction: PropTypes.func.isRequired,
     removeReaction: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
+    selected: PropTypes.bool,
   };
 
+  state = {
+    unread: !this.props.announcement.get('read'),
+  };
+
+  componentDidUpdate () {
+    const { selected, announcement } = this.props;
+    if (!selected && this.state.unread !== !announcement.get('read')) {
+      this.setState({ unread: !announcement.get('read') });
+    }
+  }
+
   render () {
     const { announcement } = this.props;
+    const { unread } = this.state;
     const startsAt = announcement.get('starts_at') && new Date(announcement.get('starts_at'));
     const endsAt = announcement.get('ends_at') && new Date(announcement.get('ends_at'));
     const now = new Date();
@@ -330,6 +343,8 @@ class Announcement extends ImmutablePureComponent {
           removeReaction={this.props.removeReaction}
           emojiMap={this.props.emojiMap}
         />
+
+        {unread && <span className='announcements__item__unread' />}
       </div>
     );
   }
@@ -342,6 +357,7 @@ class Announcements extends ImmutablePureComponent {
   static propTypes = {
     announcements: ImmutablePropTypes.list,
     emojiMap: ImmutablePropTypes.map.isRequired,
+    dismissAnnouncement: PropTypes.func.isRequired,
     addReaction: PropTypes.func.isRequired,
     removeReaction: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
@@ -351,6 +367,21 @@ class Announcements extends ImmutablePureComponent {
     index: 0,
   };
 
+  componentDidMount () {
+    this._markAnnouncementAsRead();
+  }
+
+  componentDidUpdate () {
+    this._markAnnouncementAsRead();
+  }
+
+  _markAnnouncementAsRead () {
+    const { dismissAnnouncement, announcements } = this.props;
+    const { index } = this.state;
+    const announcement = announcements.get(index);
+    if (!announcement.get('read')) dismissAnnouncement(announcement.get('id'));
+  }
+
   handleChangeIndex = index => {
     this.setState({ index: index % this.props.announcements.size });
   }
@@ -377,7 +408,7 @@ class Announcements extends ImmutablePureComponent {
 
         <div className='announcements__container'>
           <ReactSwipeableViews animateHeight={!reduceMotion} adjustHeight={reduceMotion} index={index} onChangeIndex={this.handleChangeIndex}>
-            {announcements.map(announcement => (
+            {announcements.map((announcement, idx) => (
               <Announcement
                 key={announcement.get('id')}
                 announcement={announcement}
@@ -385,6 +416,7 @@ class Announcements extends ImmutablePureComponent {
                 addReaction={this.props.addReaction}
                 removeReaction={this.props.removeReaction}
                 intl={intl}
+                selected={index === idx}
               />
             ))}
           </ReactSwipeableViews>
diff --git a/app/javascript/mastodon/features/getting_started/containers/announcements_container.js b/app/javascript/mastodon/features/getting_started/containers/announcements_container.js
index 8c3fc2e6b5..9d03ad6f78 100644
--- a/app/javascript/mastodon/features/getting_started/containers/announcements_container.js
+++ b/app/javascript/mastodon/features/getting_started/containers/announcements_container.js
@@ -1,5 +1,5 @@
 import { connect } from 'react-redux';
-import { addReaction, removeReaction } from 'mastodon/actions/announcements';
+import { addReaction, removeReaction, dismissAnnouncement } from 'mastodon/actions/announcements';
 import Announcements from '../components/announcements';
 import { createSelector } from 'reselect';
 import { Map as ImmutableMap } from 'immutable';
@@ -12,6 +12,7 @@ const mapStateToProps = state => ({
 });
 
 const mapDispatchToProps = dispatch => ({
+  dismissAnnouncement: id => dispatch(dismissAnnouncement(id)),
   addReaction: (id, name) => dispatch(addReaction(id, name)),
   removeReaction: (id, name) => dispatch(removeReaction(id, name)),
 });
diff --git a/app/javascript/mastodon/features/home_timeline/index.js b/app/javascript/mastodon/features/home_timeline/index.js
index 2bad22bc1d..577ff33bb0 100644
--- a/app/javascript/mastodon/features/home_timeline/index.js
+++ b/app/javascript/mastodon/features/home_timeline/index.js
@@ -24,7 +24,7 @@ const mapStateToProps = state => ({
   hasUnread: state.getIn(['timelines', 'home', 'unread']) > 0,
   isPartial: state.getIn(['timelines', 'home', 'isPartial']),
   hasAnnouncements: !state.getIn(['announcements', 'items']).isEmpty(),
-  unreadAnnouncements: state.getIn(['announcements', 'unread']).size,
+  unreadAnnouncements: state.getIn(['announcements', 'items']).count(item => !item.get('read')),
   showAnnouncements: state.getIn(['announcements', 'show']),
 });
 
diff --git a/app/javascript/mastodon/reducers/announcements.js b/app/javascript/mastodon/reducers/announcements.js
index 1653318ce2..34e08eac88 100644
--- a/app/javascript/mastodon/reducers/announcements.js
+++ b/app/javascript/mastodon/reducers/announcements.js
@@ -10,14 +10,14 @@ import {
   ANNOUNCEMENTS_REACTION_REMOVE_FAIL,
   ANNOUNCEMENTS_TOGGLE_SHOW,
   ANNOUNCEMENTS_DELETE,
+  ANNOUNCEMENTS_DISMISS_SUCCESS,
 } from '../actions/announcements';
-import { Map as ImmutableMap, List as ImmutableList, Set as ImmutableSet, fromJS } from 'immutable';
+import { Map as ImmutableMap, List as ImmutableList, fromJS } from 'immutable';
 
 const initialState = ImmutableMap({
   items: ImmutableList(),
   isLoading: false,
   show: false,
-  unread: ImmutableSet(),
 });
 
 const updateReaction = (state, id, name, updater) => state.update('items', list => list.map(announcement => {
@@ -42,24 +42,11 @@ const addReaction = (state, id, name) => updateReaction(state, id, name, x => x.
 
 const removeReaction = (state, id, name) => updateReaction(state, id, name, x => x.set('me', false).update('count', y => y - 1));
 
-const addUnread = (state, items) => {
-  if (state.get('show')) {
-    return state;
-  }
-
-  const newIds = ImmutableSet(items.map(x => x.get('id')));
-  const oldIds = ImmutableSet(state.get('items').map(x => x.get('id')));
-
-  return state.update('unread', unread => unread.union(newIds.subtract(oldIds)));
-};
-
 const sortAnnouncements = list => list.sortBy(x => x.get('starts_at') || x.get('published_at'));
 
 const updateAnnouncement = (state, announcement) => {
   const idx = state.get('items').findIndex(x => x.get('id') === announcement.get('id'));
 
-  state = addUnread(state, [announcement]);
-
   if (idx > -1) {
     // Deep merge is used because announcements from the streaming API do not contain
     // personalized data about which reactions have been selected by the given user,
@@ -74,7 +61,6 @@ export default function announcementsReducer(state = initialState, action) {
   switch(action.type) {
   case ANNOUNCEMENTS_TOGGLE_SHOW:
     return state.withMutations(map => {
-      if (!map.get('show')) map.set('unread', ImmutableSet());
       map.set('show', !map.get('show'));
     });
   case ANNOUNCEMENTS_FETCH_REQUEST:
@@ -83,10 +69,6 @@ export default function announcementsReducer(state = initialState, action) {
     return state.withMutations(map => {
       const items = fromJS(action.announcements);
 
-      map.set('unread', ImmutableSet());
-
-      addUnread(map, items);
-
       map.set('items', items);
       map.set('isLoading', false);
     });
@@ -102,8 +84,10 @@ export default function announcementsReducer(state = initialState, action) {
   case ANNOUNCEMENTS_REACTION_REMOVE_REQUEST:
   case ANNOUNCEMENTS_REACTION_ADD_FAIL:
     return removeReaction(state, action.id, action.name);
+  case ANNOUNCEMENTS_DISMISS_SUCCESS:
+    return updateAnnouncement(state, fromJS({ 'id': action.id, 'read': true }));
   case ANNOUNCEMENTS_DELETE:
-    return state.update('unread', set => set.delete(action.id)).update('items', list => {
+    return state.update('items', list => {
       const idx = list.findIndex(x => x.get('id') === action.id);
 
       if (idx > -1) {
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 7c09780b4f..d90d9734dc 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -6694,6 +6694,18 @@ noscript {
       font-weight: 500;
       margin-bottom: 10px;
     }
+
+    &__unread {
+      position: absolute;
+      top: 15px;
+      right: 15px;
+      display: inline-block;
+      background: $highlight-text-color;
+      border-radius: 50%;
+      width: 0.625rem;
+      height: 0.625rem;
+      margin: 0 .15em;
+    }
   }
 
   &__pagination {
diff --git a/app/serializers/rest/announcement_serializer.rb b/app/serializers/rest/announcement_serializer.rb
index ae962aa1de..ae72f9aceb 100644
--- a/app/serializers/rest/announcement_serializer.rb
+++ b/app/serializers/rest/announcement_serializer.rb
@@ -4,15 +4,25 @@ class REST::AnnouncementSerializer < ActiveModel::Serializer
   attributes :id, :content, :starts_at, :ends_at, :all_day,
              :published_at, :updated_at
 
+  attribute :read, if: :current_user?
+
   has_many :mentions
   has_many :tags, serializer: REST::StatusSerializer::TagSerializer
   has_many :emojis, serializer: REST::CustomEmojiSerializer
   has_many :reactions, serializer: REST::ReactionSerializer
 
+  def current_user?
+    !current_user.nil?
+  end
+
   def id
     object.id.to_s
   end
 
+  def read
+    object.announcement_mutes.where(account: current_user.account).exists?
+  end
+
   def content
     Formatter.instance.linkify(object.text)
   end