Sorde-l'Abbaye (French pronunciation: [sɔʁd labei]; Occitan: Sòrda l'Abadia) is a commune, in the department of Landes and the region of Nouvelle-Aquitaine in southwestern France.

Situated on the via Turonensis, an ancient road between Landes and Pyrénées, Sorde l'Abbaye was visited from the Upper Paleolithic and experienced a revival in the Middle Ages as a result of pilgrimage to Compostella.

The site of Barat-de-Vin (in Gascon, "barat de bi") not far from the village, has been a thoroughfare for at least two thousand years, and was inhabited by ancient man who would have been attracted by the fertility of the Adour river valley.

Prehistoric remains of the Upper Paleolithic period have been recovered at nearby Duruthy cave, which was classified as a historic monument on 13 April 1962.

excavations along the Roman road leading to Spain via the Col de Cize also revealed a Gallo-Roman villa decorated with mosaics.