SS Cornwallis was a 5,438 gross register tons (GRT) steam merchant ship built in 1921 for the Canadian Government as Canadian Transporter. In 1932 she was transferred to Canadian National Steamships Ltd and renamed SS Cornwallis. She was sunk on 3 December 1944 after being torpedoed by the German submarine U-1230 on its way to St John with a loss of 43 crew.