Chetpet lake (Chethupattu Aeri) is a lake spread over 16 acres in Chetput, Chennai, India. It is located to the north of Chetpet railway station. It is the only existing lake at the centre of the city. The lake belongs to the Department of Fisheries of the Tamil Nadu government. Of the total area of the lake, the waterbody is spread across 9.1 acres and the land area covers 6.9 acres. An anglers club was functioning till the 1940s in the lake, whose members visited the small island in the midst of the waterbody for fishing.