Lago Coipasa is a lake in Sabaya Province, Oruro Department, Bolivia. At an elevation of 3657 m, its surface area is 806 km². It is located on the western part of Altiplano, 20 km north of Salar de Uyuni and south of the main road linking Oruro and Huara (Chile).
Lake Coipasa is a tectonic saline lake with a depth of 3.5 metres that is surrounded by the Salar de Coipasa ("Coipasa Salt Flats"), and dominated by the volcanic cone of the 4,920 m high Wila Pukarani.