Howe Island is an island located in the St. Lawrence River east of Kingston in Frontenac County, Ontario, Canada. It is part of the Thousand Islands chain. Together with Wolfe Island and Simcoe Island, Howe Island is part of the township of Frontenac Islands, created through municipal amalgamation in 1998.
Howe Island measures 13 km (8 mi) long and 5 km (3 mi) wide and has an area of 31 km² (12 mi²). The main channel of the St. Lawrence River passes to the south of the island, while the Bateau Channel passes on the north between the Canadian mainland and the island.