Colonsay /kəˈlɒnziː/ is a town in the rural municipality of Colonsay No. 342, Saskatchewan, in the Canadian province of Saskatchewan. Colonsay is located on Highway 16 (the Yellowhead Highway part of the Trans-Canada Highway) running east-west in central Saskatchewan near the intersection with Highway 2.Colonsay derived its name from the Inner Hebrides Scottish island of Colonsay All the streets in the village are also named after islands located along the west coast of Scotland.