Grenade-sur-l'Adour (, literally Grenade on the Adour; , before 1962: Grenade) is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France.
The town is located between two larger towns of Aire-sur-l'Adour and Mont-de-Marsan.
Areas of interest include a 15th-century bastide and a Catholic church of the same era.