- a department in SW France. 3,615 sq. mi. (9,365 sq. km). Capital: Mont-de-Marsan.
- a department of SW France, in Aquitaine region. Capital: Mont-de-Marsan. Pop: 341 254 (2003 est). Area: 9364 sq km (3652 sq miles)
- a region of SW France, on the Bay of Biscay: occupies most of the Landes department and parts of Gironde and Lot-et-Garonne; consists chiefly of the most extensive forest in France. Area: 14 000 sq km (5400 sq miles)
