Hatchet Lake is a remote lake in the north-eastern part of the Canadian province of Saskatchewan. It is north of Wollaston Lake along the course of the Fond du Lac River. The Fond du Lac River flows from Wollaston Lake through Hatchet Lake north-west to Black Lake and Lake Athabasca.
The lake is served by the Hatchet Lake Airport and Hatchet Lake Water Aerodrome, both operated by the Hatchet Lake Lodge. There is no highway access to the lake.
In 1963, the Hatchet Lake Lodge was constructed on Sandy Island, one of the islands near the eastern shore of Hatchet Lake. Hatchet Lake Lodge is a fly-in fishing lodge.
Fish commonly found in Hatchet Lake include cisco, lake whitefish, round whitefish, burbot, walleye, Arctic grayling, lake trout, northern pike, white sucker, longnose sucker, and yellow perch.