CGS Simcoe was a lighthouse supply and buoy vessel of the Canadian government acquired for service on the Great Lakes.

Entering service in 1909, Simcoe was active until 1917 when the vessel foundered while transiting to Saint John, New Brunswick with the loss of 44 persons.

Simcoe was a lighthouse supply and buoy vessel of steel construction designed for service on the Great Lakes.

The vessel was powered by two triple expansion steam engines driving two screws generating 217 horsepower (162 kW) (nominal).

[1] Simcoe was ordered from Swan Hunter and Wigham Richardson Limited to be constructed in their yard at Wallsend, England.