Lake Parinacochas (possibly from Aymara parina flamingo, Quechua qucha lake, lagoon, "flamingo lake") is a lake in Ayacucho Region in Peru. It is located west of Sara Sara volcano at an elevation of above sea level. The lake is 12 km long and 9 km wide, and has a catchment area of .
Lake Parinacochas is a shallow brackish lake, with some salt pan areas appearing at low water levels.
Inkawasi, a ruined village of Inca origin, lies on the north-western shore of Lake Parinacochas.
The lake is located in a dry puna grassland region. Aquatic vegetation is represented by reeds of Typha sp. and submerged plants of genus Potamogeton.