diff -u b/core/modules/views/src/Plugin/views/display/Page.php b/core/modules/views/src/Plugin/views/display/Page.php
--- b/core/modules/views/src/Plugin/views/display/Page.php
+++ b/core/modules/views/src/Plugin/views/display/Page.php
@@ -238,8 +238,8 @@
 
     // If the display path starts with 'admin/' the page will be
     // rendered with the Administration theme regardless of the
-    // 'use_admin_theme' option therefore, we need to set the summary message 
-    // to reflect this.    
+    // 'use_admin_theme' option therefore, we need to set the summary message to
+    //  reflect this.
     $display_path = $this->getOption('path');
     if (!empty($display_path) && stripos($display_path, 'admin/') === 0) {
       $admin_theme_text = $this->t("Yes (Forced by path)");
@@ -473,9 +473,13 @@
         $form['use_admin_theme'] = [
           '#type' => 'checkbox',
           '#title' => $this->t('Use the administration theme'),
-          '#description' => $this->t('Paths starting with "admin/" use the admin theme even when this option is not checked.'),
+          '#description' => $this->t('Paths starting with "admin/" uses the admin theme.'),
           '#default_value' => $this->getOption('use_admin_theme'),
         ];
+        $display_path = $this->getOption('path');
+        if (!empty($display_path) && stripos($display_path, 'admin/') === 0) {
+          $form['use_admin_theme']['#attributes'] = array('disabled' => 'disabled');
+        }
         break;
     }
   }