Kelleys Island is located in the western basin of Lake Erie about four miles north of Marblehead and twelve miles from Sandusky on the Ohio mainland. The entire island measures more than four square miles and is the largest American island in Lake Erie. A short drive from major cities makes Kelleys seem right next door, yet the Canadian Border lies only a few miles north of the island.
Today, Kelleys Island is primarily a vacation destination, and sees thousands of visitors each summer. Notable attractions include its various beaches, parks, and campgrounds. Several ferries provide regular transport for most travelers; the island also features a number of marinas, as well as a small airfield for private planes. It is the largest of the American Lake Erie Islands, and is a part of the Sandusky, Ohio Metropolitan Statistical Area.
Kelleys Island features a number of public beaches. Many areas allow swimming, boating, and fishing.
Kelleys is listed as the 7th most ecologically threatened island in the Great Lakes.