diff --git a/borgmatic/actions/compact.py b/borgmatic/actions/compact.py
index 00585b0b..7a25b829 100644
--- a/borgmatic/actions/compact.py
+++ b/borgmatic/actions/compact.py
@@ -2,6 +2,7 @@ import logging
 
 import borgmatic.borg.compact
 import borgmatic.borg.feature
+import borgmatic.config.validate
 import borgmatic.hooks.command
 
 logger = logging.getLogger(__name__)
@@ -24,6 +25,11 @@ def run_compact(
     '''
     Run the "compact" action for the given repository.
     '''
+    if compact_arguments.repository and not borgmatic.config.validate.repositories_match(
+        repository, compact_arguments.repository
+    ):
+        return
+
     borgmatic.hooks.command.execute_hook(
         hooks.get('before_compact'),
         hooks.get('umask'),
diff --git a/borgmatic/commands/arguments.py b/borgmatic/commands/arguments.py
index fbf71685..6991db58 100644
--- a/borgmatic/commands/arguments.py
+++ b/borgmatic/commands/arguments.py
@@ -357,6 +357,10 @@ def make_parsers():
         add_help=False,
     )
     compact_group = compact_parser.add_argument_group('compact arguments')
+    compact_group.add_argument(
+        '--repository',
+        help='Path of specific existing repository to compact (must be already specified in a borgmatic configuration file)',
+    )
     compact_group.add_argument(
         '--progress',
         dest='progress',
diff --git a/tests/unit/actions/test_compact.py b/tests/unit/actions/test_compact.py
index bc2b9406..fab21f32 100644
--- a/tests/unit/actions/test_compact.py
+++ b/tests/unit/actions/test_compact.py
@@ -3,13 +3,67 @@ from flexmock import flexmock
 from borgmatic.actions import compact as module
 
 
-def test_compact_actions_calls_hooks():
+def test_compact_actions_calls_hooks_for_configured_repository():
     flexmock(module.logger).answer = lambda message: None
     flexmock(module.borgmatic.borg.feature).should_receive('available').and_return(True)
     flexmock(module.borgmatic.borg.compact).should_receive('compact_segments')
     flexmock(module.borgmatic.hooks.command).should_receive('execute_hook').times(2)
     compact_arguments = flexmock(
-        progress=flexmock(), cleanup_commits=flexmock(), threshold=flexmock()
+        repository=None, progress=flexmock(), cleanup_commits=flexmock(), threshold=flexmock()
+    )
+    global_arguments = flexmock(monitoring_verbosity=1, dry_run=False)
+
+    module.run_compact(
+        config_filename='test.yaml',
+        repository='repo',
+        storage={},
+        retention={},
+        hooks={},
+        hook_context={},
+        local_borg_version=None,
+        compact_arguments=compact_arguments,
+        global_arguments=global_arguments,
+        dry_run_label='',
+        local_path=None,
+        remote_path=None,
+    )
+
+
+def test_compact_runs_with_select_repository():
+    flexmock(module.logger).answer = lambda message: None
+    flexmock(module.borgmatic.config.validate).should_receive('repositories_match').and_return(True)
+    flexmock(module.borgmatic.borg.feature).should_receive('available').and_return(True)
+    flexmock(module.borgmatic.borg.compact).should_receive('compact_segments')
+    compact_arguments = flexmock(
+        repository='repo', progress=flexmock(), cleanup_commits=flexmock(), threshold=flexmock()
+    )
+    global_arguments = flexmock(monitoring_verbosity=1, dry_run=False)
+
+    module.run_compact(
+        config_filename='test.yaml',
+        repository='repo',
+        storage={},
+        retention={},
+        hooks={},
+        hook_context={},
+        local_borg_version=None,
+        compact_arguments=compact_arguments,
+        global_arguments=global_arguments,
+        dry_run_label='',
+        local_path=None,
+        remote_path=None,
+    )
+
+
+def test_compact_bails_if_repository_does_not_match():
+    flexmock(module.logger).answer = lambda message: None
+    flexmock(module.borgmatic.borg.feature).should_receive('available').and_return(True)
+    flexmock(module.borgmatic.config.validate).should_receive('repositories_match').and_return(
+        False
+    )
+    flexmock(module.borgmatic.borg.compact).should_receive('compact_segments').never()
+    compact_arguments = flexmock(
+        repository='repo2', progress=flexmock(), cleanup_commits=flexmock(), threshold=flexmock()
     )
     global_arguments = flexmock(monitoring_verbosity=1, dry_run=False)