Kelleys Island is both a village in Erie County, Ohio, and the island which it fully occupies in Lake Erie. The island has a total area of 4.41 square miles (11.42 km2) and was formed by glacial action on limestone and dolomite.

Middle Bass Island is an island of the U.S. state of Ohio, located in Lake Erie. A small town, Middle Bass, lies on the island. The 805-acre (3.258 km2) island is shaped like the Big Dipper and is one of three Bass Islands located at the center of a group of 23 smaller islands. It is located in Put-in-Bay Township, Ottawa County, Ohio.