Fawn Island is a small Canadian island located in the St. Clair River between Sombra, Ontario and Marine City, Michigan.

The island is approximately 50 miles (80 km) northeast of Detroit, Michigan and Windsor, Ontario.

The canals divide the island into three islets, joined by two small bridges.

The island was frequented by tourists who would enjoy the hotel, dancing, and picnics, but it was eventually abandoned.

In 1955, J.L Thompson, the mayor of Wallaceburg, Ontario, began developing the item as a summer resort community, eventually owning most of the island.