San Martín de los Andes is a city in the province of Neuquén, Argentina. It is located in the Lácar Department in the south-west of the province, at the foot of the Andes, beside the Lácar Lake, 45 km from the border with Chile and about 1,545 km (960 mi) from Buenos Aires. It has a population of about 24,000 inhabitants in town and throughout its surrounding area (2001 census [INDEC]).