Lake Beyşehir (Turkish: Beyşehir Gölü) is a large freshwater lake in Isparta and Konya provinces, southwestern part of Turkey. It is located at around 37°47′0″N 31°33′0″E / 37.78333°N 31.55000°E. It has an area of 650.00 km² and is 45 km long and 20 km wide. It carries the same name as the principal urban centre of its region, Beyşehir.