diff --git a/activities/models/post.py b/activities/models/post.py
index 127626e..e3e3da2 100644
--- a/activities/models/post.py
+++ b/activities/models/post.py
@@ -329,6 +329,8 @@ class Post(StatorModel):
         action_unlike = "{view}unlike/"
         action_boost = "{view}boost/"
         action_unboost = "{view}unboost/"
+        action_bookmark = "{view}bookmark/"
+        action_unbookmark = "{view}unbookmark/"
         action_delete = "{view}delete/"
         action_edit = "{view}edit/"
         action_report = "{view}report/"
@@ -1059,7 +1061,7 @@ class Post(StatorModel):
 
     ### Mastodon API ###
 
-    def to_mastodon_json(self, interactions=None, identity=None):
+    def to_mastodon_json(self, interactions=None, bookmarks=None, identity=None):
         reply_parent = None
         if self.in_reply_to:
             # Load the PK and author.id explicitly to prevent a SELECT on the entire author Identity
@@ -1128,4 +1130,6 @@ class Post(StatorModel):
         if interactions:
             value["favourited"] = self.pk in interactions.get("like", [])
             value["reblogged"] = self.pk in interactions.get("boost", [])
+        if bookmarks:
+            value["bookmarked"] = self.pk in bookmarks
         return value
diff --git a/activities/models/timeline_event.py b/activities/models/timeline_event.py
index e94dd8e..2f62d19 100644
--- a/activities/models/timeline_event.py
+++ b/activities/models/timeline_event.py
@@ -221,10 +221,10 @@ class TimelineEvent(models.Model):
             raise ValueError(f"Cannot convert {self.type} to notification JSON")
         return result
 
-    def to_mastodon_status_json(self, interactions=None, identity=None):
+    def to_mastodon_status_json(self, interactions=None, bookmarks=None, identity=None):
         if self.type == self.Types.post:
             return self.subject_post.to_mastodon_json(
-                interactions=interactions, identity=identity
+                interactions=interactions, bookmarks=bookmarks, identity=identity
             )
         elif self.type == self.Types.boost:
             return self.subject_post_interaction.to_mastodon_status_json(
diff --git a/activities/services/timeline.py b/activities/services/timeline.py
index 8450dbf..734fa74 100644
--- a/activities/services/timeline.py
+++ b/activities/services/timeline.py
@@ -102,3 +102,13 @@ class TimelineService:
             )
             .order_by("-id")
         )
+
+    def bookmarks(self) -> models.QuerySet[Post]:
+        """
+        Return all bookmarked posts for an identity
+        """
+        return (
+            PostService.queryset()
+            .filter(bookmarks__identity=self.identity)
+            .order_by("-id")
+        )
diff --git a/activities/views/posts.py b/activities/views/posts.py
index fb8f099..d8e6fdc 100644
--- a/activities/views/posts.py
+++ b/activities/views/posts.py
@@ -146,6 +146,39 @@ class Boost(View):
         return redirect(post.urls.view)
 
 
+@method_decorator(identity_required, name="dispatch")
+class Bookmark(View):
+    """
+    Adds/removes a bookmark from the current identity to the post
+    """
+
+    undo = False
+
+    def post(self, request, handle, post_id):
+        identity = by_handle_or_404(self.request, handle, local=False)
+        post = get_object_or_404(
+            PostService.queryset()
+            .filter(author=identity)
+            .visible_to(request.identity, include_replies=True),
+            pk=post_id,
+        )
+        if self.undo:
+            request.identity.bookmarks.filter(post=post).delete()
+        else:
+            request.identity.bookmarks.get_or_create(post=post)
+        # Return either a redirect or a HTMX snippet
+        if request.htmx:
+            return render(
+                request,
+                "activities/_bookmark.html",
+                {
+                    "post": post,
+                    "bookmarks": set() if self.undo else {post.pk},
+                },
+            )
+        return redirect(post.urls.view)
+
+
 @method_decorator(identity_required, name="dispatch")
 class Delete(TemplateView):
     """
diff --git a/activities/views/timelines.py b/activities/views/timelines.py
index c748b76..ec75a5b 100644
--- a/activities/views/timelines.py
+++ b/activities/views/timelines.py
@@ -7,6 +7,7 @@ from activities.models import Hashtag, PostInteraction, TimelineEvent
 from activities.services import TimelineService
 from core.decorators import cache_page
 from users.decorators import identity_required
+from users.models import Bookmark
 
 from .compose import Compose
 
@@ -31,6 +32,9 @@ class Home(TemplateView):
                 event_page,
                 self.request.identity,
             ),
+            "bookmarks": Bookmark.for_identity(
+                self.request.identity, event_page, "subject_post_id"
+            ),
             "current_page": "home",
             "allows_refresh": True,
             "page_obj": event_page,
@@ -68,6 +72,9 @@ class Tag(ListView):
         context["interactions"] = PostInteraction.get_post_interactions(
             context["page_obj"], self.request.identity
         )
+        context["bookmarks"] = Bookmark.for_identity(
+            self.request.identity, context["page_obj"]
+        )
         return context
 
 
@@ -91,6 +98,9 @@ class Local(ListView):
         context["interactions"] = PostInteraction.get_post_interactions(
             context["page_obj"], self.request.identity
         )
+        context["bookmarks"] = Bookmark.for_identity(
+            self.request.identity, context["page_obj"]
+        )
         return context
 
 
@@ -112,6 +122,9 @@ class Federated(ListView):
         context["interactions"] = PostInteraction.get_post_interactions(
             context["page_obj"], self.request.identity
         )
+        context["bookmarks"] = Bookmark.for_identity(
+            self.request.identity, context["page_obj"]
+        )
         return context
 
 
@@ -173,4 +186,7 @@ class Notifications(ListView):
             context["page_obj"],
             self.request.identity,
         )
+        context["bookmarks"] = Bookmark.for_identity(
+            self.request.identity, context["page_obj"], "subject_post_id"
+        )
         return context
diff --git a/api/schemas.py b/api/schemas.py
index 087bee1..fd5b89d 100644
--- a/api/schemas.py
+++ b/api/schemas.py
@@ -165,10 +165,13 @@ class Status(Schema):
         cls,
         post: activities_models.Post,
         interactions: dict[str, set[str]] | None = None,
+        bookmarks: set[str] | None = None,
         identity: users_models.Identity | None = None,
     ) -> "Status":
         return cls(
-            **post.to_mastodon_json(interactions=interactions, identity=identity)
+            **post.to_mastodon_json(
+                interactions=interactions, bookmarks=bookmarks, identity=identity
+            )
         )
 
     @classmethod
@@ -180,8 +183,11 @@ class Status(Schema):
         interactions = activities_models.PostInteraction.get_post_interactions(
             posts, identity
         )
+        bookmarks = users_models.Bookmark.for_identity(identity, posts)
         return [
-            cls.from_post(post, interactions=interactions, identity=identity)
+            cls.from_post(
+                post, interactions=interactions, bookmarks=bookmarks, identity=identity
+            )
             for post in posts
         ]
 
@@ -190,11 +196,12 @@ class Status(Schema):
         cls,
         timeline_event: activities_models.TimelineEvent,
         interactions: dict[str, set[str]] | None = None,
+        bookmarks: set[str] | None = None,
         identity: users_models.Identity | None = None,
     ) -> "Status":
         return cls(
             **timeline_event.to_mastodon_status_json(
-                interactions=interactions, identity=identity
+                interactions=interactions, bookmarks=bookmarks, identity=identity
             )
         )
 
@@ -207,8 +214,13 @@ class Status(Schema):
         interactions = activities_models.PostInteraction.get_event_interactions(
             events, identity
         )
+        bookmarks = users_models.Bookmark.for_identity(
+            identity, events, "subject_post_id"
+        )
         return [
-            cls.from_timeline_event(event, interactions=interactions, identity=identity)
+            cls.from_timeline_event(
+                event, interactions=interactions, bookmarks=bookmarks, identity=identity
+            )
             for event in events
         ]
 
diff --git a/api/urls.py b/api/urls.py
index 0b1553b..13cc9dc 100644
--- a/api/urls.py
+++ b/api/urls.py
@@ -91,6 +91,8 @@ urlpatterns = [
     path("v1/statuses/<id>/favourited_by", statuses.favourited_by),
     path("v1/statuses/<id>/reblog", statuses.reblog_status),
     path("v1/statuses/<id>/unreblog", statuses.unreblog_status),
+    path("v1/statuses/<id>/bookmark", statuses.bookmark_status),
+    path("v1/statuses/<id>/unbookmark", statuses.unbookmark_status),
     # Tags
     path("v1/followed_tags", tags.followed_tags),
     # Timelines
diff --git a/api/views/bookmarks.py b/api/views/bookmarks.py
index ca382eb..b2079c7 100644
--- a/api/views/bookmarks.py
+++ b/api/views/bookmarks.py
@@ -1,8 +1,11 @@
 from django.http import HttpRequest
 from hatchway import api_view
 
+from activities.models import Post
+from activities.services import TimelineService
 from api import schemas
 from api.decorators import scope_required
+from api.pagination import MastodonPaginator, PaginatingApiResponse, PaginationResult
 
 
 @scope_required("read:bookmarks")
@@ -14,5 +17,17 @@ def bookmarks(
     min_id: str | None = None,
     limit: int = 20,
 ) -> list[schemas.Status]:
-    # We don't implement this yet
-    return []
+    queryset = TimelineService(request.identity).bookmarks()
+    paginator = MastodonPaginator()
+    pager: PaginationResult[Post] = paginator.paginate(
+        queryset,
+        min_id=min_id,
+        max_id=max_id,
+        since_id=since_id,
+        limit=limit,
+    )
+    return PaginatingApiResponse(
+        schemas.Status.map_from_post(pager.results, request.identity),
+        request=request,
+        include_params=["limit"],
+    )
diff --git a/api/views/statuses.py b/api/views/statuses.py
index 5ce6e36..287d5e2 100644
--- a/api/views/statuses.py
+++ b/api/views/statuses.py
@@ -267,3 +267,25 @@ def unreblog_status(request, id: str) -> schemas.Status:
     return schemas.Status.from_post(
         post, interactions=interactions, identity=request.identity
     )
+
+
+@scope_required("write:bookmarks")
+@api_view.post
+def bookmark_status(request, id: str) -> schemas.Status:
+    post = post_for_id(request, id)
+    request.identity.bookmarks.get_or_create(post=post)
+    interactions = PostInteraction.get_post_interactions([post], request.identity)
+    return schemas.Status.from_post(
+        post, interactions=interactions, bookmarks={post.pk}, identity=request.identity
+    )
+
+
+@scope_required("write:bookmarks")
+@api_view.post
+def unbookmark_status(request, id: str) -> schemas.Status:
+    post = post_for_id(request, id)
+    request.identity.bookmarks.filter(post=post).delete()
+    interactions = PostInteraction.get_post_interactions([post], request.identity)
+    return schemas.Status.from_post(
+        post, interactions=interactions, identity=request.identity
+    )
diff --git a/takahe/urls.py b/takahe/urls.py
index 9cb157d..a6e368b 100644
--- a/takahe/urls.py
+++ b/takahe/urls.py
@@ -242,6 +242,10 @@ urlpatterns = [
     path("@<handle>/posts/<int:post_id>/unlike/", posts.Like.as_view(undo=True)),
     path("@<handle>/posts/<int:post_id>/boost/", posts.Boost.as_view()),
     path("@<handle>/posts/<int:post_id>/unboost/", posts.Boost.as_view(undo=True)),
+    path("@<handle>/posts/<int:post_id>/bookmark/", posts.Bookmark.as_view()),
+    path(
+        "@<handle>/posts/<int:post_id>/unbookmark/", posts.Bookmark.as_view(undo=True)
+    ),
     path("@<handle>/posts/<int:post_id>/delete/", posts.Delete.as_view()),
     path("@<handle>/posts/<int:post_id>/report/", report.SubmitReport.as_view()),
     path("@<handle>/posts/<int:post_id>/edit/", compose.Compose.as_view()),
diff --git a/templates/activities/_bookmark.html b/templates/activities/_bookmark.html
new file mode 100644
index 0000000..ab9731d
--- /dev/null
+++ b/templates/activities/_bookmark.html
@@ -0,0 +1,9 @@
+{% if post.pk in bookmarks %}
+    <a title="Unbookmark" class="active" hx-trigger="click, keyup[key=='Enter']" hx-post="{{ post.urls.action_unbookmark }}" hx-swap="outerHTML" tabindex="0">
+        <i class="fa-solid fa-bookmark"></i>
+    </a>
+{% else %}
+    <a title="Bookmark" hx-trigger="click, keyup[key=='Enter']" hx-post="{{ post.urls.action_bookmark }}" hx-swap="outerHTML" tabindex="0">
+        <i class="fa-regular fa-bookmark"></i>
+    </a>
+{% endif %}
diff --git a/templates/activities/_post.html b/templates/activities/_post.html
index 1c1a6e6..a983004 100644
--- a/templates/activities/_post.html
+++ b/templates/activities/_post.html
@@ -82,6 +82,7 @@
             {% include "activities/_reply.html" %}
             {% include "activities/_like.html" %}
             {% include "activities/_boost.html" %}
+            {% include "activities/_bookmark.html" %}
             <a title="Menu" class="menu" _="on click or keyup[key is 'Enter'] toggle .enabled on the next <menu/> then halt" role="menuitem" aria-haspopup="menu" tabindex="0">
                 <i class="fa-solid fa-bars"></i>
             </a>
diff --git a/users/admin.py b/users/admin.py
index 7494c7a..76b1ec7 100644
--- a/users/admin.py
+++ b/users/admin.py
@@ -8,6 +8,7 @@ from activities.admin import IdentityLocalFilter
 from users.models import (
     Announcement,
     Block,
+    Bookmark,
     Domain,
     Follow,
     Identity,
@@ -221,3 +222,9 @@ class ReportAdmin(admin.ModelAdmin):
 class AnnouncementAdmin(admin.ModelAdmin):
     list_display = ["id", "published", "start", "end", "text"]
     autocomplete_fields = ["seen"]
+
+
+@admin.register(Bookmark)
+class BookmarkAdmin(admin.ModelAdmin):
+    list_display = ["id", "identity", "post", "created"]
+    raw_id_fields = ["identity", "post"]
diff --git a/users/migrations/0015_bookmark.py b/users/migrations/0015_bookmark.py
new file mode 100644
index 0000000..2ff3789
--- /dev/null
+++ b/users/migrations/0015_bookmark.py
@@ -0,0 +1,49 @@
+# Generated by Django 4.1.7 on 2023-03-11 00:11
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("activities", "0012_in_reply_to_index"),
+        ("users", "0014_domain_notes"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Bookmark",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("created", models.DateTimeField(auto_now_add=True)),
+                (
+                    "identity",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="bookmarks",
+                        to="users.identity",
+                    ),
+                ),
+                (
+                    "post",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="bookmarks",
+                        to="activities.post",
+                    ),
+                ),
+            ],
+            options={
+                "unique_together": {("identity", "post")},
+            },
+        ),
+    ]
diff --git a/users/models/__init__.py b/users/models/__init__.py
index f564ed8..b1eed6c 100644
--- a/users/models/__init__.py
+++ b/users/models/__init__.py
@@ -1,5 +1,6 @@
 from .announcement import Announcement  # noqa
 from .block import Block, BlockStates  # noqa
+from .bookmark import Bookmark  # noqa
 from .domain import Domain  # noqa
 from .follow import Follow, FollowStates  # noqa
 from .identity import Identity, IdentityStates  # noqa
diff --git a/users/models/bookmark.py b/users/models/bookmark.py
new file mode 100644
index 0000000..66f7f7a
--- /dev/null
+++ b/users/models/bookmark.py
@@ -0,0 +1,39 @@
+from django.db import models
+
+
+class Bookmark(models.Model):
+    """
+    A (private) bookmark of a Post by an Identity
+    """
+
+    identity = models.ForeignKey(
+        "users.Identity",
+        on_delete=models.CASCADE,
+        related_name="bookmarks",
+    )
+    post = models.ForeignKey(
+        "activities.Post",
+        on_delete=models.CASCADE,
+        related_name="bookmarks",
+    )
+
+    created = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        unique_together = [("identity", "post")]
+
+    def __str__(self):
+        return f"#{self.id}: {self.identity} → {self.post}"
+
+    @classmethod
+    def for_identity(cls, identity, posts=None, field="id"):
+        """
+        Returns a set of bookmarked Post IDs for the given identity. If `posts` is
+        specified, it is used to filter bookmarks matching those in the list.
+        """
+        if identity is None:
+            return set()
+        queryset = cls.objects.filter(identity=identity)
+        if posts:
+            queryset = queryset.filter(post_id__in=[getattr(p, field) for p in posts])
+        return set(queryset.values_list("post_id", flat=True))