La Teste-de-Buch

La Teste-de-Buch (French pronunciation:; Occitan: La Tèsta (de Bug), ; lit. 'La Teste-of-Buch') is a coastal commune in the Girondedepartment in the Nouvelle-Aquitaineregion in Southwestern France. Until 13 June 1994, it was officially known simply as La Teste.

The commune is located on the south shore of Arcachon Bay (Bassin d'Arcachon) and on the Atlantic coast of France, lying in the southwestern part of Gironde, on the departmental border with Landes. It is the eighth-largest commune in metropolitan France in geographical area at 180.20 km (69.58 sq mi). It is the largest and most populated of the four communes that make up the Communauté d'agglomération Bassin d'Arcachon Sud (COBAS), which coincides with the urban unit (agglomeration) of La Teste-de-Buch-Arcachon, population 67,563 (2018). As of 2023, the population of the commune was 27,566.

La Teste-de-Buch is famous for the Dune of Pilat (Dune du Pilat), the highest sand dune in Europe.