Colville Lake is the 20th largest lake in Canada's Northwest Territories. The lake is located 100 km (62 mi) northwest of Great Bear Lake in the Sahtu Region. The lake has a perimeter of 121 km (75 mi) and a net area of 416 km² (161 sq mi) and a total area of 439 km² (169 sq mi).
In Canada's Northwest Territories, Colville Lake is the 20th in size.