Towns
| State | City/Town | Town Title |
|---|---|---|
| Ohio | Summit Station | Summit Station, OH |
| Ohio | Summitville | Summitville, OH |
| Ohio | Sunbury | Sunbury, OH |
| Ohio | Swanton | Swanton, OH |
| Ohio | Sycamore | Sycamore, OH |
| Ohio | Sylvania | Sylvania, OH |
| Ohio | Syracuse | Syracuse, OH |
| Ohio | Tallmadge | Tallmadge, OH |
| Ohio | Tarlton | Tarlton, OH |
| Ohio | Terrace Park | Terrace Park, OH |
| Ohio | The Plains | The Plains, OH |
| Ohio | Thompson | Thompson, OH |
| Ohio | Thornville | Thornville, OH |
| Ohio | Thurman | Thurman, OH |
| Ohio | Thurston | Thurston, OH |
| Ohio | Tiffin | Tiffin, OH |
| Ohio | Tiltonsville | Tiltonsville, OH |
| Ohio | Tipp City | Tipp City, OH |
| Ohio | Tippecanoe | Tippecanoe, OH |
| Ohio | Tiro | Tiro, OH |
| Ohio | Toledo | Toledo, OH |
| Ohio | Tontogany | Tontogany, OH |
| Ohio | Toronto | Toronto, OH |
| Ohio | Tremont City | Tremont City, OH |
| Ohio | Trenton | Trenton, OH |