Molson's Island Lighthouse was located on the southwest point of Molson's Island, approximately southeast of the Chateau de Silva lighthouse. This was on the eastern side of the lake, near Georgeville. It was built in 1878 as a white square wooden tower with a fixed white catoptric light located at a height of above the high water mark and with a range of . The light had a focal plane of . It was rebuilt in 1914 and demolished on an unknown date. The light was replaced with a lighted buoy.