Island Lake is a shallow lake in the west-central part of the Canadian province of Saskatchewan. The lake is in the Mid-boreal Upland ecozone of Canada. There are two large islands and one small island in the lake. On the south-eastern shore is a provincial campground. From the northernmost point of the lake, a creek flows out and to the east where it meets Tea Creek. Tea Creek flows north into Green Lake, which is part of the Beaver River watershed.

Island Lake Recreation Site (53°58′28″N 107°44′17″W / 53.9745°N 107.7381°W / 53.9745; -107.7381) is a small, rustic provincial campground. The park includes the south-eastern shore of the lake and the three islands within the lake. Access is from a 6-kilometre (3.7 mi) gravel road that starts at the intersection of Highways 943 and 945.

• List of lakes of Saskatchewan
• Tourism in Saskatchewan