Ustaritz is a town in the traditional Basque province of Labourd, now a commune in the Pyrénées-Atlantiques department, southwestern France. It is located on the river Nive some 13 kilometres (8.1 mi) inland from Bayonne. Ustaritz station has rail connections to Saint-Jean-Pied-de-Port, Cambo-les-Bains and Bayonne.