Howe Island is an island located in Lake Ontario 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.

The Thousand Islands constitute a North American archipelago of 1,864 islands that straddles the Canada–US border in the Saint Lawrence River as it emerges from the northeast corner of Lake Ontario. They stretch for about 50 miles (80 km) downstream from Kingston, Ontario. The Canadian islands are in the province of Ontario and the U.S. islands in the state of New York.