Townsend Lake is a lake in the Canadian province of Saskatchewan. It is located in the east-central part of the province in the Porcupine Hills and Porcupine Provincial Forest. The lake is in the Woody River Block of Porcupine Hills Provincial Park. Highway 980 provides access to the east side of the lake and its amenities. Several small creeks feed into the lake from the surrounding hills, lakes, and muskeg. The outflow is a short river at the eastern end of the lake that flows into the western end of Woody Lake.