Saint-Jean-de-Luz (Basque Donibane Lohizune) is a commune in the Pyrénées-Atlantiques department in south-western France.
It is in the traditional province of Lapurdi of the Basque Country.

Saint-Jean-de-Luz is a fishing port on the Basque coast and now a famous resort, known for its architecture, sandy bay, the quality of the light and the cuisine. The town is located south of Biarritz, on the right bank of the river Nivelle (French for Urdazuri) opposite to Ciboure. The port lies on the estuary just before the river joins the ocean.