| Island | County |
|---|---|
| Ballast Island | Ottawa |
| Catawba Island | Ottawa |
| Gilbraltar Island | Ottawa |
| Green Island | Ottawa |
| Kelleys Island | Erie |
| Middle Bass Island | Ottawa |
| Mouse Island | Ottawa |
| North Bass Island | Ottawa |
| Rattlesnake Island | Ottawa |
| South Bass Island | Ottawa |
| Starve Island | Ottawa |
| Sugar Island | Ottawa |
| The Rattles Island | Ottawa |
| Turtle Island | Lucas |
| Island | County | Waters |
|---|---|---|
| Abbotts Island | Seneca | Sandusky River |
| Artist Island | Logan | Indian Lake |
| Austin Island | Clinton | Cowan Lake |
| Bank Island | Logan | Indian Lake |
| *Bass Island | Hamilton | Little Miami River |
| Beach Island | Licking | Buckeye Lake |
| Bellefontaine Island | Logan | Indian Lake |
| Big Walnut Island | Logan | Indian Lake |
| Blackberry Island | Shelby | Lake Loramie |
| Blackhawk Island | Logan | Indian Lake |
| Blue Grass Island | Lucas | Maumee River |
| Bope Island | Licking | Buckeye Lake |
| Bradys Island | Sandusky | Sandusky River |
| Brundage Island | Perry | Buckeye Lake |
| Butler Island | Lucas | Maumee River |
| Buttonwood Island | Wood | Maumee River |
| Campobello Island | Montgomery | Great Miami River |
| Caseys Island | Wood | Maumee River |
| Castle Island | Fairfield | Buckeye Lake |
| Charleston Island | Perry | Buckeye Lake |
| Chippewa Island | Logan | Indian Lake |
| Circle Island | Fairfield | Buckeye Lake |
| Clark Island | Lucas | Maumee River |
| Copeland Island | Muskingum | Muskingum River |
| Corbutt Island | Lucas | Maumee River |
| *Crane Island | Licking | Buckeye Lake |
| Crane Town Island | Logan | Indian Lake |
| Crawford Island | Shelby | Lake Loramie |
| Crystal Beach Island | Logan | Indian Lake |
| *Dana Island | Washington | Muskingum River |
| Delaware Island | Lucas | Maumee River |
| Elm Island | Licking | Buckeye Lake |
| Ewing Island | Logan | Indian Lake |
| Ewing Island | Lucas | Maumee River |
| Fantasy Island | Logan | Indian Lake |
| Fawn Island | Logan | Indian Lake |
| Fox Island | Lucas | Maumee River |
| Fox Island | Logan | Indian Lake |
| Gibson Island | Fairfield | Buckeye Lake |
| Girty Island | Henry | Maumee River |
| Goose Island | Portage | Michael J. Kirwan Reservoir |
| Governor's Island | Logan | Indian Lake |
| Granger Island | Lucas | Maumee River |
| Grape Island | Lucas | Maumee River |
| Grassy Island | Lucas | Maumee Bay |
| Grassy Island | Wood | Maumee River |
| Grave Island | Lucas | Maumee River |
| Graveyard Island | Sandusky | Muddy Creek Bay |
| Hedges Island | Wood | Maumee River |
| Hickory Island | Perry | Buckeye Lake |
| Hickory Island | Sandusky | Muddy Creek Bay |
| Hickory Island | Portage | Michael J. Kirwan Reservoir |
| Howard Island | Wood | Maumee River |
| Indian Island | Lucas | Maumee River |
| Jackson Island | Muskingum | Muskingum River |
| Johnson Island | Ottawa | Sandusky Bay |
| Journal Island | Fairfield | Buckeye Lake |
| Keller Island | Fairfield | Buckeye Lake |
| Lake Ridge Island | Logan | Indian Lake |
| Liebs Island | Fairfield | Buckeye Lake |
| Little Walnut Isle | Logan | Indian Lake |
| Long Island | Logan | Indian Lake |
| Marengo Island | Lucas | Maumee River |
| McConnells Island | Morgan | Muskingum River |
| Millers Island | Wood | Maumee River |
| Minnewauken Island | Logan | Indian Lake |
| Missionary Island | Lucas | Maumee River |
| Moose Island | Tuscarawas | Tuscarawas River |
| Mud Island | Fairfield | Buckeye Lake |
| Myers Island | Summit | Hower Lake |
| Neely Island | Logan | Indian Lake |
| Number 3 Island | Wood | Maumee River |
| Orchard Island | Fairfield | Buckeye Lake |
| Otter Island | Wood | Maumee River |
| Peach Island | Sandusky | Muddy Creek Bay |
| Pew Island | Logan | Indian Lake |
| Pony Island | Logan | Indian Lake |
| Preston Island | Defiance | Maumee River |
| Ram Island | Lake | Grand River |
| Red Oak Island | Logan | Indian Lake |
| Richard Island | Logan | Indian Lake |
| Preston Island | Defiance | Maumee River |
| Roche de Boeuf | Lucas | Maumee River |
| Rohrers Island | Montgomery | Mad River |
| Round Island | Fairfield | Buckeye Lake |
| Safety Island | Mercer | Grand Lake |
| Sand Island | Henry | Maumee River |
| Seminole Island | Logan | Indian Lake |
| Shawnee Island | Logan | Indian Lake |
| Sheets Island | Wood | Maumee River |
| Sherman Island | Licking | Buckeye Lake |
| Snake Island | Pickaway | Big Darby Creek |
| Snow Island | Logan | Indian Lake |
| South Walnut Isle | Logan | Indian Lake |
| Squaw Island | Sandusky | Muddy Creek Bay |
| Strauch Island | Hamilton | Unknown Pond |
| Tecumseh Island | Logan | Indian Lake |
| Turkey Foot Island | Logan | Indian Lake |
| Turkeyfoot Island | Summit | Turkeyfoot Lake |
| Turtle Shell Island | Logan | Indian Lake |
| Vienna Island | Washington | Ohio River |
| Watkins Island | Licking | Buckeye Lake |
| Wolf Island | Logan | Indian Lake |
| Woodcock Island | Lucas | Maumee River |