Kelleys Island, Ohio is the largest U.S. island in Lake Erie. It is located about 5 miles north of the Marblehead Peninsula and about 12 miles NW of the city of Sandusky. It lies roughly equidistant between Detroit, MI/Toledo, OH and Cleveland, OH.

Kelleys Island has two notable historic monuments: Glacial Grooves and Inscription Rock. Historic industries in the 19th and 20th centuries were quarrying limestone, vineyards, commercial fishing, and farming. Today only quarrying limestone remains. The island received its name when brothers in the Kelley family purchased much of the acreage around 1833. The island had previously been known as Cunningham's Island.

Kelleys Island was initially a township and on July 27, 1887 the whole island was incorporated by the State of Ohio as the Village of Kelleys Island, in Erie County.

Kelleys Island is composed of 2,888 acres of limestone bedrock. It is roughly 2 1/2 by 4 miles. The perimeter is about 18 miles around.

The village owns and maintains a municipal airport on Monaghan Road. The island can be reached by local airlines (located off-island), ferry service from Marblehead, and private boats and planes.

For tourist information, contact the Kelleys Island Chamber of Commerce at 419-746-2360, at Seaway Marina. The State of Ohio operates a State Park on Kelleys Island. For information call 419-746-2546. There are two churches on Kelleys Island: Zion United Methodist Church at 103 Chappel Street (419-746-2514) and St. Michael's Roman Catholic Church at 219 Chappel Street (419-746-2481).