diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index c9dad00bdc..23359c7f52 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -59,6 +59,7 @@ Yii Framework 2 Change Log
 - Enh #9337: Added `yii\db\ColumnSchemaBuilder::defaultExpression()` to support DB Expression as default value (kotchuprik)
 - Enh #9465: ./yii migrate/create now generates code based on migration name and --fields (pana1990)
 - Enh #9476: Added DI injection via controller action method signature (mdmunir)
+- Enh #9573: Added `yii\rbac\ManagerInterface::getUserIDsByRole()` and implementations (samdark)
 - Enh #9635: Added default CSS class for `\yii\grid\ActionColumn` header (arogachev, dynasource)
 - Enh #9643: Added migrations for DB cache (mdmunir)
 - Enh #9711: Added `yii\widgets\LinkPager::$pageCssClass` that allows to set default page class (ShNURoK42)
diff --git a/framework/UPGRADE.md b/framework/UPGRADE.md
index c53c9224c9..16989310f4 100644
--- a/framework/UPGRADE.md
+++ b/framework/UPGRADE.md
@@ -36,6 +36,7 @@ the event.
 with global variable `yii` instead.
 * Traversable objects are now formatted as arrays in XML response to support SPL objects and Generators. Previous
   behavior could be turned on by setting `XmlResponseFormatter::$useTraversableAsArray` to `false`.
+* If you've implemented `yii\rbac\ManagerInterface` you need to implement additional method `getUserIDsByRole($roleName)`.
 
 Upgrade from Yii 2.0.5
 ----------------------
diff --git a/framework/rbac/DbManager.php b/framework/rbac/DbManager.php
index 9fa9c7e065..0b86449d21 100644
--- a/framework/rbac/DbManager.php
+++ b/framework/rbac/DbManager.php
@@ -955,4 +955,21 @@ class DbManager extends BaseManager
 
         $this->cache->set($this->cacheKey, [$this->items, $this->rules, $this->parents]);
     }
+
+    /**
+     * Returns all role assignment information for the specified role.
+     * @param string $roleName
+     * @return Assignment[] the assignments. An empty array will be
+     * returned if role is not assigned to any user.
+     */
+    public function getUserIDsByRole($roleName)
+    {
+        if (empty($roleName)) {
+            return [];
+        }
+
+        return (new Query)->select('[[user_id]]')
+            ->from($this->assignmentTable)
+            ->where(['item_name' => $roleName])->column($this->db);
+    }
 }
diff --git a/framework/rbac/ManagerInterface.php b/framework/rbac/ManagerInterface.php
index 072bbd898e..1a870c03ab 100644
--- a/framework/rbac/ManagerInterface.php
+++ b/framework/rbac/ManagerInterface.php
@@ -210,6 +210,13 @@ interface ManagerInterface
      */
     public function getAssignments($userId);
 
+    /**
+     * Returns all user IDs assigned to the role specified.
+     * @param string $roleName
+     * @return array array of user ID strings
+     */
+    public function getUserIDsByRole($roleName);
+
     /**
      * Removes all authorization data, including roles, permissions, rules, and assignments.
      */
diff --git a/framework/rbac/PhpManager.php b/framework/rbac/PhpManager.php
index da95a0aa98..0b0ddca223 100644
--- a/framework/rbac/PhpManager.php
+++ b/framework/rbac/PhpManager.php
@@ -809,4 +809,20 @@ class PhpManager extends BaseManager
         }
         $this->saveToFile($rules, $this->ruleFile);
     }
+
+    /**
+     * @inheritdoc
+     */
+    public function getUserIDsByRole($roleName)
+    {
+        $result = [];
+        foreach ($this->assignments as $userID => $assignments) {
+            foreach ($assignments as $userAssignment) {
+                if ($userAssignment->roleName === $roleName && $userAssignment->userId === $userID) {
+                    $result[] = (string)$userID;
+                }
+            }
+        }
+        return $result;
+    }
 }
diff --git a/tests/framework/rbac/ManagerTestCase.php b/tests/framework/rbac/ManagerTestCase.php
index a94a615a67..fca21dbe98 100644
--- a/tests/framework/rbac/ManagerTestCase.php
+++ b/tests/framework/rbac/ManagerTestCase.php
@@ -298,4 +298,18 @@ abstract class ManagerTestCase extends TestCase
         $this->assertEquals(1, count($this->auth->getAssignments(42)));
         $this->assertEquals(2, count($this->auth->getAssignments(1337)));
     }
+
+    public function testGetAssignmentsByRole()
+    {
+        $this->prepareData();
+        $reader = $this->auth->getRole('reader');
+        $this->auth->assign($reader, 123);
+
+        $this->auth = $this->createManager();
+
+        $this->assertEquals([], $this->auth->getUserIDsByRole('nonexisting'));
+        $this->assertEquals(['reader A', '123'], $this->auth->getUserIDsByRole('reader'), '', 0.0, 10, true);
+        $this->assertEquals(['author B'], $this->auth->getUserIDsByRole('author'));
+        $this->assertEquals(['admin C'], $this->auth->getUserIDsByRole('admin'));
+    }
 }