Lake Yenişehir ( Turkish: Yenişehir Gölü, aka Lake Reyhanlı) is a small lake in Turkey.

The lake is at 36°14′15″N 36°34′10″E / 36.23750°N 36.56944°E / 36.23750; 36.56944 in Reyhanlı ilçe (district) of Hatay Province. Its distance Reyhanlı centrum is 4 kilometres (2.5 mi).

The surface area of the lake is 20 decares (0.020 km; 0.0077 sq mi) and its maximum dept is 8 metres (26 ft). It is fed by underground water. The lake is an artificial lake . It was formed in 1865 to reduce marsh land and later to provide water to the city. Now the lake is a popular picnic area of Reyhanlı citizens.