Étang d'Aureilhan or Lac d'Aureilhan is a lake at Aureilhan in the Landes department, France. At an elevation of 10 m, its surface area is 3.4 km2.

Landes is a department in the Nouvelle-Aquitaine region, Southwestern France, with a long coastline on the Atlantic Ocean to the west. It also borders Gers to the east, Pyrénées-Atlantiques to the sou