town, Pyrénées-Atlantiques département, Aquitaine région, southwestern France. It lies along the Bay of Biscay (Biscay, Bay of), adjacent to Bayonne and Anglet and 11 miles (18 km) from the Spanish border.

Once a small fishing village, Biarritz was made fashionable after 1854 by Napoleon III and his Spanish empress, Eugénie. The British are largely responsible for its growth as a winter residence. Visited by Queen Victoria, Edward VII, and Alfonso XIII of Spain, Biarritz began to call itself “the queen of resorts and the resort of kings.”

The region's mild climate, the variety of beaches and scenery, and the town's luxurious tourist accommodations continue to draw an international clientele, but the exclusive, upmarket image of Biarritz has changed. Tourism is more diversified, with the organization of festivals, conference facilities, and a centre for thalassotherapy (the use of seawater, algae, mud, and other marine items as therapeutic treatment). A promenade runs between the sandy beaches of the Grand Plage, facing northwest, and the Côte des Basques. The beaches are split by a rocky promontory, and the town is a popular resort for windsurfers and surfers, who descend on Biarritz in July when it conducts a surfing festival and hosts the European longboard championships. The folklore and traditions of the Basques of the district are an added attraction. Pop. (1999) 30,055; (2005 est.) 31,000.