diff --git a/superset/db_engine_specs/bigquery.py b/superset/db_engine_specs/bigquery.py
index 42561f05cbb..97e331b1be3 100644
--- a/superset/db_engine_specs/bigquery.py
+++ b/superset/db_engine_specs/bigquery.py
@@ -728,15 +728,17 @@ class BigQueryEngineSpec(BaseEngineSpec):  # pylint: disable=too-many-public-met
                 "Could not import libraries needed to connect to BigQuery."
             )
 
+        project: str | None = engine.url.host or None
+
         if credentials_info := engine.dialect.credentials_info:
             credentials = service_account.Credentials.from_service_account_info(
                 credentials_info
             )
-            return bigquery.Client(credentials=credentials)
+            return bigquery.Client(credentials=credentials, project=project)
 
         try:
             credentials = google.auth.default()[0]
-            return bigquery.Client(credentials=credentials)
+            return bigquery.Client(credentials=credentials, project=project)
         except google.auth.exceptions.DefaultCredentialsError as ex:
             raise SupersetDBAPIConnectionError(
                 "The database credentials could not be found."
diff --git a/tests/unit_tests/db_engine_specs/test_bigquery.py b/tests/unit_tests/db_engine_specs/test_bigquery.py
index 69a9923e995..a8402bc8bb4 100644
--- a/tests/unit_tests/db_engine_specs/test_bigquery.py
+++ b/tests/unit_tests/db_engine_specs/test_bigquery.py
@@ -430,6 +430,78 @@ def test_get_default_catalog(mocker: MockerFixture) -> None:
     assert BigQueryEngineSpec.get_default_catalog(database) == "project"
 
 
+@pytest.mark.parametrize(
+    ("sqlalchemy_uri", "schema", "expected_project"),
+    [
+        ("bigquery://uri-project", None, "uri-project"),
+        ("bigquery:///uri-project", None, "uri-project"),
+        ("bigquery://", "dataset_name", None),
+    ],
+)
+def test_get_client_resolves_uri_project_with_service_account_credentials(
+    mocker: MockerFixture,
+    sqlalchemy_uri: str,
+    schema: str | None,
+    expected_project: str | None,
+) -> None:
+    """Test that service-account clients use the project from the engine URI."""
+    from superset.db_engine_specs.bigquery import BigQueryEngineSpec
+
+    credentials_info = {"project_id": "credential-project"}
+    credentials = mock.Mock()
+    engine = mock.MagicMock()
+    engine.url = BigQueryEngineSpec.adjust_engine_params(
+        make_url(sqlalchemy_uri), {}, schema=schema
+    )[0]
+    engine.dialect.credentials_info = credentials_info
+    create_credentials = mocker.patch(
+        "superset.db_engine_specs.bigquery.service_account.Credentials."
+        "from_service_account_info",
+        return_value=credentials,
+    )
+    client = mocker.patch("superset.db_engine_specs.bigquery.bigquery.Client")
+
+    BigQueryEngineSpec._get_client(engine, mock.Mock())
+
+    create_credentials.assert_called_once_with(credentials_info)
+    client.assert_called_once_with(credentials=credentials, project=expected_project)
+
+
+@pytest.mark.parametrize(
+    ("sqlalchemy_uri", "schema", "expected_project"),
+    [
+        ("bigquery://uri-project", None, "uri-project"),
+        ("bigquery:///uri-project", None, "uri-project"),
+        ("bigquery://", "dataset_name", None),
+    ],
+)
+def test_get_client_resolves_uri_project_with_application_default_credentials(
+    mocker: MockerFixture,
+    sqlalchemy_uri: str,
+    schema: str | None,
+    expected_project: str | None,
+) -> None:
+    """Test that ADC clients use the project from the engine URI."""
+    from superset.db_engine_specs.bigquery import BigQueryEngineSpec
+
+    credentials = mock.Mock()
+    engine = mock.MagicMock()
+    engine.url = BigQueryEngineSpec.adjust_engine_params(
+        make_url(sqlalchemy_uri), {}, schema=schema
+    )[0]
+    engine.dialect.credentials_info = None
+    get_default_credentials = mocker.patch(
+        "superset.db_engine_specs.bigquery.google.auth.default",
+        return_value=(credentials, "credential-project"),
+    )
+    client = mocker.patch("superset.db_engine_specs.bigquery.bigquery.Client")
+
+    BigQueryEngineSpec._get_client(engine, mock.Mock())
+
+    get_default_credentials.assert_called_once_with()
+    client.assert_called_once_with(credentials=credentials, project=expected_project)
+
+
 def test_get_time_partition_column_uses_catalog_in_table_reference(
     mocker: MockerFixture,
 ) -> None: