A civil parish (served by St James, Isle of Grain Parish Council) on the eastern part of the Hoo Peninsula in Medway borough, Kent, England.

An island area, the larger northern part of Lewis and Harris, in the Outer Hebrides, Western Isles council area, Scotland.

An island and special municipality south of the island of Cuba, across the Gulf of Batabanó.

A barrier island in Jefferson Parish, Louisiana, United States, on the coast of the Gulf of Mexico / A town in Jefferson Parish, Louisiana, United States, on the eponymous island

A large island in the Firth of Clyde, North Ayrshire council area, Scotland.

A peninsula (not an island) on the coast of Dorset, England.

A county in East Anglia, England, created in 1965 by the merger of the administrative counties of Cambridgeshire and Isle of Ely and absorbed into an enlarged Cambridgeshire in 1974.

One of 95 counties in Virginia, United States. County seat: Isle of Wight.

One of 14 counties in Vermont, United States. Shire town: North Hero. The county is composed of islands and a peninsula in Lake Champlain.

One of 83 counties in Michigan, United States. County seat: Rogers City.