diff --git a/airflow/providers/google/common/hooks/base_google.py b/airflow/providers/google/common/hooks/base_google.py
index 77fd9394cfc62..3bde53571a939 100644
--- a/airflow/providers/google/common/hooks/base_google.py
+++ b/airflow/providers/google/common/hooks/base_google.py
@@ -267,6 +267,8 @@ def get_credentials_and_project_id(self) -> tuple[google.auth.credentials.Creden
 
         if not self.impersonation_chain:
             self.impersonation_chain = self._get_field("impersonation_chain", None)
+            if isinstance(self.impersonation_chain, str) and "," in self.impersonation_chain:
+                self.impersonation_chain = [s.strip() for s in self.impersonation_chain.split(",")]
 
         target_principal, delegates = _get_target_principal_and_delegates(self.impersonation_chain)
 
diff --git a/docs/apache-airflow-providers-google/connections/gcp.rst b/docs/apache-airflow-providers-google/connections/gcp.rst
index 83bab9ca90b75..cc82f5639126c 100644
--- a/docs/apache-airflow-providers-google/connections/gcp.rst
+++ b/docs/apache-airflow-providers-google/connections/gcp.rst
@@ -131,7 +131,7 @@ Impersonation Chain
     of the last account in the list, which will be impersonated in all requests leveraging this connection.
     If set as a string, the account must grant the originating account
     the Service Account Token Creator IAM role.
-    If set as a sequence, the identities from the list must grant
+    If set as a comma-separated list, the identities from the list must grant
     Service Account Token Creator IAM role to the directly preceding identity, with first
     account from the list granting this role to the originating account.
 
diff --git a/tests/providers/google/common/hooks/test_base_google.py b/tests/providers/google/common/hooks/test_base_google.py
index 06d04f63187b1..bd4342ec66d78 100644
--- a/tests/providers/google/common/hooks/test_base_google.py
+++ b/tests/providers/google/common/hooks/test_base_google.py
@@ -683,6 +683,20 @@ def test_authorize_assert_http_timeout_is_present(self, mock_get_credentials):
                 ["ACCOUNT_2", "ACCOUNT_3"],
                 id="multiple_elements_list_with_override",
             ),
+            pytest.param(
+                None,
+                "ACCOUNT_1,ACCOUNT_2,ACCOUNT_3",
+                "ACCOUNT_3",
+                ["ACCOUNT_1", "ACCOUNT_2"],
+                id="multiple_elements_list_as_string",
+            ),
+            pytest.param(
+                None,
+                "ACCOUNT_1, ACCOUNT_2, ACCOUNT_3",
+                "ACCOUNT_3",
+                ["ACCOUNT_1", "ACCOUNT_2"],
+                id="multiple_elements_list_as_string_with_space",
+            ),
         ],
     )
     @mock.patch(MODULE_NAME + ".get_credentials_and_project_id")