diff --git a/app/javascript/mastodon/actions/importer/index.js b/app/javascript/mastodon/actions/importer/index.js
index 047cf11910c..a527043940f 100644
--- a/app/javascript/mastodon/actions/importer/index.js
+++ b/app/javascript/mastodon/actions/importer/index.js
@@ -71,7 +71,7 @@ export function importFetchedStatuses(statuses) {
       }
 
       if (status.poll?.id) {
-        pushUnique(polls, createPollFromServerJSON(status.poll, getState().polls.get(status.poll.id)));
+        pushUnique(polls, createPollFromServerJSON(status.poll, getState().polls[status.poll.id]));
       }
 
       if (status.card) {
diff --git a/app/javascript/mastodon/actions/polls.ts b/app/javascript/mastodon/actions/polls.ts
index 28f729394b0..65a96e8f622 100644
--- a/app/javascript/mastodon/actions/polls.ts
+++ b/app/javascript/mastodon/actions/polls.ts
@@ -15,7 +15,7 @@ export const importFetchedPoll = createAppAsyncThunk(
 
     dispatch(
       importPolls({
-        polls: [createPollFromServerJSON(poll, getState().polls.get(poll.id))],
+        polls: [createPollFromServerJSON(poll, getState().polls[poll.id])],
       }),
     );
   },
diff --git a/app/javascript/mastodon/api_types/polls.ts b/app/javascript/mastodon/api_types/polls.ts
index 275ca29fd72..891a2faba79 100644
--- a/app/javascript/mastodon/api_types/polls.ts
+++ b/app/javascript/mastodon/api_types/polls.ts
@@ -13,7 +13,7 @@ export interface ApiPollJSON {
   expired: boolean;
   multiple: boolean;
   votes_count: number;
-  voters_count: number;
+  voters_count: number | null;
 
   options: ApiPollOptionJSON[];
   emojis: ApiCustomEmojiJSON[];
diff --git a/app/javascript/mastodon/components/poll.tsx b/app/javascript/mastodon/components/poll.tsx
index 48f4214c261..c3ba7c97efb 100644
--- a/app/javascript/mastodon/components/poll.tsx
+++ b/app/javascript/mastodon/components/poll.tsx
@@ -49,7 +49,7 @@ export const Poll: React.FC<PollProps> = (props) => {
   const { pollId, status } = props;
 
   // Third party hooks
-  const poll = useAppSelector((state) => state.polls.get(pollId));
+  const poll = useAppSelector((state) => state.polls[pollId]);
   const identity = useIdentity();
   const intl = useIntl();
   const dispatch = useAppDispatch();
@@ -63,8 +63,8 @@ export const Poll: React.FC<PollProps> = (props) => {
     if (!poll) {
       return false;
     }
-    const expiresAt = poll.get('expires_at');
-    return poll.get('expired') || new Date(expiresAt).getTime() < Date.now();
+    const expiresAt = poll.expires_at;
+    return poll.expired || new Date(expiresAt).getTime() < Date.now();
   }, [poll]);
   const timeRemaining = useMemo(() => {
     if (!poll) {
@@ -73,18 +73,18 @@ export const Poll: React.FC<PollProps> = (props) => {
     if (expired) {
       return intl.formatMessage(messages.closed);
     }
-    return <RelativeTimestamp timestamp={poll.get('expires_at')} futureDate />;
+    return <RelativeTimestamp timestamp={poll.expires_at} futureDate />;
   }, [expired, intl, poll]);
   const votesCount = useMemo(() => {
     if (!poll) {
       return null;
     }
-    if (poll.get('voters_count')) {
+    if (poll.voters_count) {
       return (
         <FormattedMessage
           id='poll.total_people'
           defaultMessage='{count, plural, one {# person} other {# people}}'
-          values={{ count: poll.get('voters_count') }}
+          values={{ count: poll.voters_count }}
         />
       );
     }
@@ -92,7 +92,7 @@ export const Poll: React.FC<PollProps> = (props) => {
       <FormattedMessage
         id='poll.total_votes'
         defaultMessage='{count, plural, one {# vote} other {# votes}}'
-        values={{ count: poll.get('votes_count') }}
+        values={{ count: poll.votes_count }}
       />
     );
   }, [poll]);
@@ -144,7 +144,7 @@ export const Poll: React.FC<PollProps> = (props) => {
       if (!poll) {
         return;
       }
-      if (poll.get('multiple')) {
+      if (poll.multiple) {
         setSelected((prev) => ({
           ...prev,
           [choiceIndex]: !prev[choiceIndex],
@@ -159,14 +159,14 @@ export const Poll: React.FC<PollProps> = (props) => {
   if (!poll) {
     return null;
   }
-  const showResults = poll.get('voted') || revealed || expired;
+  const showResults = poll.voted || revealed || expired;
 
   return (
     <div className='poll'>
       <ul>
-        {poll.get('options').map((option, i) => (
+        {poll.options.map((option, i) => (
           <PollOption
-            key={option.get('title') || i}
+            key={option.title || i}
             index={i}
             poll={poll}
             option={option}
@@ -204,7 +204,7 @@ export const Poll: React.FC<PollProps> = (props) => {
           </>
         )}
         {votesCount}
-        {poll.get('expires_at') && <> · {timeRemaining}</>}
+        {poll.expires_at && <> · {timeRemaining}</>}
       </div>
     </div>
   );
@@ -222,36 +222,30 @@ type PollOptionProps = Pick<PollProps, 'disabled' | 'lang'> & {
 const PollOption: React.FC<PollOptionProps> = (props) => {
   const { active, lang, disabled, poll, option, index, showResults, onChange } =
     props;
-  const voted = option.get('voted') || poll.get('own_votes')?.includes(index);
-  const title =
-    (option.getIn(['translation', 'title']) as string) || option.get('title');
+  const voted = option.voted || poll.own_votes?.includes(index);
+  const title = option.translation?.title ?? option.title;
 
   const intl = useIntl();
 
   // Derived values
   const percent = useMemo(() => {
-    const pollVotesCount = poll.get('voters_count') || poll.get('votes_count');
+    const pollVotesCount = poll.voters_count ?? poll.votes_count;
     return pollVotesCount === 0
       ? 0
-      : (option.get('votes_count') / pollVotesCount) * 100;
+      : (option.votes_count / pollVotesCount) * 100;
   }, [option, poll]);
   const isLeading = useMemo(
     () =>
-      poll
-        .get('options')
-        .filterNot((other) => other.get('title') === option.get('title'))
-        .every(
-          (other) => option.get('votes_count') >= other.get('votes_count'),
-        ),
+      poll.options
+        .filter((other) => other.title !== option.title)
+        .every((other) => option.votes_count >= other.votes_count),
     [poll, option],
   );
   const titleHtml = useMemo(() => {
-    let titleHtml =
-      (option.getIn(['translation', 'titleHtml']) as string) ||
-      option.get('titleHtml');
+    let titleHtml = option.translation?.titleHtml ?? option.titleHtml;
 
     if (!titleHtml) {
-      const emojiMap = makeEmojiMap(poll.get('emojis'));
+      const emojiMap = makeEmojiMap(poll.emojis);
       titleHtml = emojify(escapeTextContentForBrowser(title), emojiMap);
     }
 
@@ -290,7 +284,7 @@ const PollOption: React.FC<PollOptionProps> = (props) => {
       >
         <input
           name='vote-options'
-          type={poll.get('multiple') ? 'checkbox' : 'radio'}
+          type={poll.multiple ? 'checkbox' : 'radio'}
           value={index}
           checked={active}
           onChange={handleOptionChange}
@@ -300,11 +294,11 @@ const PollOption: React.FC<PollOptionProps> = (props) => {
         {!showResults && (
           <span
             className={classNames('poll__input', {
-              checkbox: poll.get('multiple'),
+              checkbox: poll.multiple,
               active,
             })}
             tabIndex={0}
-            role={poll.get('multiple') ? 'checkbox' : 'radio'}
+            role={poll.multiple ? 'checkbox' : 'radio'}
             onKeyDown={handleOptionKeyPress}
             aria-checked={active}
             aria-label={title}
@@ -316,7 +310,7 @@ const PollOption: React.FC<PollOptionProps> = (props) => {
           <span
             className='poll__number'
             title={intl.formatMessage(messages.votes, {
-              votes: option.get('votes_count'),
+              votes: option.votes_count,
             })}
           >
             {Math.round(percent)}%
diff --git a/app/javascript/mastodon/containers/media_container.jsx b/app/javascript/mastodon/containers/media_container.jsx
index df162730cf2..9c07341faad 100644
--- a/app/javascript/mastodon/containers/media_container.jsx
+++ b/app/javascript/mastodon/containers/media_container.jsx
@@ -13,6 +13,7 @@ import Card from 'mastodon/features/status/components/card';
 import MediaModal from 'mastodon/features/ui/components/media_modal';
 import { Video } from 'mastodon/features/video';
 import { IntlProvider } from 'mastodon/locales';
+import { createPollFromServerJSON } from 'mastodon/models/poll';
 import { getScrollbarWidth } from 'mastodon/utils/scrollbar';
 
 const MEDIA_COMPONENTS = { MediaGallery, Video, Card, Poll, Hashtag, Audio };
@@ -88,7 +89,7 @@ export default class MediaContainer extends PureComponent {
             Object.assign(props, {
               ...(media   ? { media:   fromJS(media)   } : {}),
               ...(card    ? { card:    fromJS(card)    } : {}),
-              ...(poll    ? { poll:    fromJS(poll)    } : {}),
+              ...(poll    ? { poll:    createPollFromServerJSON(poll)    } : {}),
               ...(hashtag ? { hashtag: fromJS(hashtag) } : {}),
 
               ...(componentName === 'Video' ? {
diff --git a/app/javascript/mastodon/models/poll.ts b/app/javascript/mastodon/models/poll.ts
index b4ba38a9c6f..6f5655680d6 100644
--- a/app/javascript/mastodon/models/poll.ts
+++ b/app/javascript/mastodon/models/poll.ts
@@ -1,6 +1,3 @@
-import type { RecordOf } from 'immutable';
-import { Record, List } from 'immutable';
-
 import escapeTextContentForBrowser from 'escape-html';
 
 import type { ApiPollJSON, ApiPollOptionJSON } from 'mastodon/api_types/polls';
@@ -9,19 +6,12 @@ import emojify from 'mastodon/features/emoji/emoji';
 import { CustomEmojiFactory, makeEmojiMap } from './custom_emoji';
 import type { CustomEmoji, EmojiMap } from './custom_emoji';
 
-interface PollOptionTranslationShape {
+interface PollOptionTranslation {
   title: string;
   titleHtml: string;
 }
 
-export type PollOptionTranslation = RecordOf<PollOptionTranslationShape>;
-
-export const PollOptionTranslationFactory = Record<PollOptionTranslationShape>({
-  title: '',
-  titleHtml: '',
-});
-
-interface PollOptionShape extends Required<ApiPollOptionJSON> {
+export interface PollOption extends ApiPollOptionJSON {
   voted: boolean;
   titleHtml: string;
   translation: PollOptionTranslation | null;
@@ -31,45 +21,30 @@ export function createPollOptionTranslationFromServerJSON(
   translation: { title: string },
   emojiMap: EmojiMap,
 ) {
-  return PollOptionTranslationFactory({
+  return {
     ...translation,
     titleHtml: emojify(
       escapeTextContentForBrowser(translation.title),
       emojiMap,
     ),
-  });
+  } as PollOptionTranslation;
 }
 
-export type PollOption = RecordOf<PollOptionShape>;
-
-export const PollOptionFactory = Record<PollOptionShape>({
-  title: '',
-  votes_count: 0,
-  voted: false,
-  titleHtml: '',
-  translation: null,
-});
-
-interface PollShape
+export interface Poll
   extends Omit<ApiPollJSON, 'emojis' | 'options' | 'own_votes'> {
-  emojis: List<CustomEmoji>;
-  options: List<PollOption>;
-  own_votes?: List<number>;
+  emojis: CustomEmoji[];
+  options: PollOption[];
+  own_votes?: number[];
 }
-export type Poll = RecordOf<PollShape>;
 
-export const PollFactory = Record<PollShape>({
-  id: '',
-  expires_at: '',
+const pollDefaultValues = {
   expired: false,
   multiple: false,
   voters_count: 0,
   votes_count: 0,
   voted: false,
-  emojis: List<CustomEmoji>(),
-  options: List<PollOption>(),
-  own_votes: List(),
-});
+  own_votes: [],
+};
 
 export function createPollFromServerJSON(
   serverJSON: ApiPollJSON,
@@ -77,33 +52,31 @@ export function createPollFromServerJSON(
 ) {
   const emojiMap = makeEmojiMap(serverJSON.emojis);
 
-  return PollFactory({
+  return {
+    ...pollDefaultValues,
     ...serverJSON,
-    emojis: List(serverJSON.emojis.map((emoji) => CustomEmojiFactory(emoji))),
-    own_votes: serverJSON.own_votes ? List(serverJSON.own_votes) : undefined,
-    options: List(
-      serverJSON.options.map((optionJSON, index) => {
-        const option = PollOptionFactory({
-          ...optionJSON,
-          voted: serverJSON.own_votes?.includes(index) || false,
-          titleHtml: emojify(
-            escapeTextContentForBrowser(optionJSON.title),
-            emojiMap,
-          ),
-        });
+    emojis: serverJSON.emojis.map((emoji) => CustomEmojiFactory(emoji)),
+    options: serverJSON.options.map((optionJSON, index) => {
+      const option = {
+        ...optionJSON,
+        voted: serverJSON.own_votes?.includes(index) || false,
+        titleHtml: emojify(
+          escapeTextContentForBrowser(optionJSON.title),
+          emojiMap,
+        ),
+      } as PollOption;
 
-        const prevOption = previousPoll?.options.get(index);
-        if (prevOption?.translation && prevOption.title === option.title) {
-          const { translation } = prevOption;
+      const prevOption = previousPoll?.options[index];
+      if (prevOption?.translation && prevOption.title === option.title) {
+        const { translation } = prevOption;
 
-          option.set(
-            'translation',
-            createPollOptionTranslationFromServerJSON(translation, emojiMap),
-          );
-        }
+        option.translation = createPollOptionTranslationFromServerJSON(
+          translation,
+          emojiMap,
+        );
+      }
 
-        return option;
-      }),
-    ),
-  });
+      return option;
+    }),
+  } as Poll;
 }
diff --git a/app/javascript/mastodon/reducers/polls.ts b/app/javascript/mastodon/reducers/polls.ts
index 9b9a5d2ff8e..aadf6741c13 100644
--- a/app/javascript/mastodon/reducers/polls.ts
+++ b/app/javascript/mastodon/reducers/polls.ts
@@ -1,5 +1,4 @@
 import type { Reducer } from '@reduxjs/toolkit';
-import { Map as ImmutableMap } from 'immutable';
 
 import { importPolls } from 'mastodon/actions/importer/polls';
 import { makeEmojiMap } from 'mastodon/models/custom_emoji';
@@ -11,57 +10,48 @@ import {
   STATUS_TRANSLATE_UNDO,
 } from '../actions/statuses';
 
-const initialState = ImmutableMap<string, Poll>();
+const initialState: Record<string, Poll> = {};
 type PollsState = typeof initialState;
 
-const statusTranslateSuccess = (
-  state: PollsState,
-  pollTranslation: Poll | undefined,
-) => {
-  if (!pollTranslation) return state;
+const statusTranslateSuccess = (state: PollsState, pollTranslation?: Poll) => {
+  if (!pollTranslation) return;
 
-  return state.withMutations((map) => {
-    const poll = state.get(pollTranslation.id);
+  const poll = state[pollTranslation.id];
 
-    if (!poll) return;
+  if (!poll) return;
 
-    const emojiMap = makeEmojiMap(poll.emojis);
+  const emojiMap = makeEmojiMap(poll.emojis);
 
-    pollTranslation.options.forEach((item, index) => {
-      map.setIn(
-        [pollTranslation.id, 'options', index, 'translation'],
-        createPollOptionTranslationFromServerJSON(item, emojiMap),
-      );
-    });
+  pollTranslation.options.forEach((item, index) => {
+    const option = poll.options[index];
+    if (!option) return;
+
+    option.translation = createPollOptionTranslationFromServerJSON(
+      item,
+      emojiMap,
+    );
   });
 };
 
 const statusTranslateUndo = (state: PollsState, id: string) => {
-  return state.withMutations((map) => {
-    const options = map.get(id)?.options;
-
-    if (options) {
-      options.forEach((item, index) =>
-        map.deleteIn([id, 'options', index, 'translation']),
-      );
-    }
+  state[id]?.options.forEach((option) => {
+    option.translation = null;
   });
 };
 
 export const pollsReducer: Reducer<PollsState> = (
-  state = initialState,
+  draft = initialState,
   action,
 ) => {
   if (importPolls.match(action)) {
-    return state.withMutations((polls) => {
-      action.payload.polls.forEach((poll) => polls.set(poll.id, poll));
+    action.payload.polls.forEach((poll) => {
+      draft[poll.id] = poll;
     });
   } else if (action.type === STATUS_TRANSLATE_SUCCESS)
-    return statusTranslateSuccess(
-      state,
-      (action.translation as { poll?: Poll }).poll,
-    );
-  else if (action.type === STATUS_TRANSLATE_UNDO)
-    return statusTranslateUndo(state, action.pollId as string);
-  else return state;
+    statusTranslateSuccess(draft, (action.translation as { poll?: Poll }).poll);
+  else if (action.type === STATUS_TRANSLATE_UNDO) {
+    statusTranslateUndo(draft, action.pollId as string);
+  }
+
+  return draft;
 };