Esnagi Lake is a large "V"-shaped lake in the Lake Superior drainage basin in Algoma District, Ontario, Canada. It is about 45 kilometres (28 mi) long and 5.0 kilometres (3.1 mi) wide and lies at an elevation of 344 metres (1,129 ft), with the "V" on its side and the apex facing west. The primary inflows are the Magpie River from Mosambik Lake at the north end of the lake, Tripoli Creek on the west side, and other unnamed creeks.