diff --git a/moto/cognitoidp/responses.py b/moto/cognitoidp/responses.py
index 80247b076..a170b7541 100644
--- a/moto/cognitoidp/responses.py
+++ b/moto/cognitoidp/responses.py
@@ -279,9 +279,13 @@ class CognitoIdpResponse(BaseResponse):
         user_pool_id = self._get_param("UserPoolId")
         limit = self._get_param("Limit")
         token = self._get_param("PaginationToken")
+        filt = self._get_param("Filter")
         users, token = cognitoidp_backends[self.region].list_users(
             user_pool_id, limit=limit, pagination_token=token
         )
+        if filt:
+            name, value = filt.replace('"', '').split('=')
+            users = [user for user in users for attribute in user.attributes if attribute['Name'] == name and attribute['Value'] == value]
         response = {"Users": [user.to_json(extended=True) for user in users]}
         if token:
             response["PaginationToken"] = str(token)