Saint-Sever (French pronunciation: [sɛ̃səve], Gascon Sent Sever [sensebe][3]) is a commune in the Landes department in Nouvelle-Aquitaine in southwestern France.

Neighboring communes: Benquet, Bas-Mauco, Audignon, Cauna, Aurice, Montaut, Banos, Coudures, Eyres-Moncube, Montsoué, Montgaillard.

According to the monastic chronicles, this was as the result of a vow he made after the battle of Taller, in Gascony, in which he defeated the Vikings (982).

The promenade of Morlanne laid out on the site of a Roman camp called Palestrion commands a fine view of the Adour and the pine forests of the Landes.

The public institutions of the town include the sub-prefecture, a tribunal of first instance, and a practical school of agriculture and viticulture which occupies a former Dominican convent.