diff --git a/api/v1/announcements/PKPAnnouncementHandler.php b/api/v1/announcements/PKPAnnouncementHandler.php
index d0f2a48a3e1..7e835274545 100644
--- a/api/v1/announcements/PKPAnnouncementHandler.php
+++ b/api/v1/announcements/PKPAnnouncementHandler.php
@@ -22,6 +22,7 @@
 use APP\facades\Repo;
 use Exception;
 use Illuminate\Support\Facades\Bus;
+use PKP\config\Config;
 use PKP\context\Context;
 use PKP\db\DAORegistry;
 use PKP\facades\Locale;
@@ -94,6 +95,10 @@ public function __construct()
      */
     public function authorize($request, &$args, $roleAssignments)
     {
+        if (!Config::getVar('features', 'site_announcements') && !$request->getContext()) {
+            return false;
+        }
+
         if (!$request->getContext()) {
             $roleAssignments = $this->getSiteRoleAssignments($roleAssignments);
         }
diff --git a/pages/admin/AdminHandler.php b/pages/admin/AdminHandler.php
index 49e44852e11..98066ec30b6 100644
--- a/pages/admin/AdminHandler.php
+++ b/pages/admin/AdminHandler.php
@@ -269,6 +269,13 @@ private function siteSettingsAvailability($request)
             'announcements',
         ];
 
+        if (!Config::getVar('features', 'site_announcements')) {
+            $tabs = array_filter(
+                $tabs,
+                function($tab) { return $tab !== 'announcements'; }
+            );
+        }
+
         $singleContextSite = (Services::get('context')->getCount() == 1);
 
         $tabsAvailability = [];
diff --git a/pages/announcement/AnnouncementHandler.php b/pages/announcement/AnnouncementHandler.php
index 564bd3e7cbb..5b2ff2f28e1 100644
--- a/pages/announcement/AnnouncementHandler.php
+++ b/pages/announcement/AnnouncementHandler.php
@@ -21,6 +21,7 @@
 use APP\facades\Repo;
 use APP\handler\Handler;
 use APP\template\TemplateManager;
+use PKP\config\Config;
 use PKP\core\PKPRequest;
 use PKP\security\authorization\ContextRequiredPolicy;
 
@@ -100,6 +101,10 @@ protected function getContextId(Request $request): int
 
     protected function isAnnouncementsEnabled(Request $request): bool
     {
+        if (!Config::getVar('features', 'site_announcements') && !$request->getContext()) {
+            return false;
+        }
+
         $contextOrSite = $request->getContext() ?? $request->getSite();
         return $contextOrSite->getData('enableAnnouncements');
     }