Cumberland Lake is a glacial lake in the Canadian province of Saskatchewan. It is situated in the Cumberland Delta in east-central Saskatchewan about 60 kilometres (37 mi) from the Manitoba border. Cumberland House and Cumberland House Provincial Historic Park are on the south shore and are accessed by Highway 123. The community has been subject to floods from the Saskatchewan River. The lake was an interior hub of fur trade routes travelled by Voyageurs during the fur trade era.

The lake supports a variety of fish species. These include walleye, sauger, yellow perch, northern pike, lake whitefish, goldeye, mooneye, white sucker, shorthead redhorse, longnose sucker, lake sturgeon, and burbot.

• List of lakes of Saskatchewan