Towns
| State | City/Town | Town Title |
|---|---|---|
| Ohio | Irwin | Irwin, OH |
| Ohio | Isle Saint George | Isle Saint George, OH |
| Ohio | Jackson | Jackson, OH |
| Ohio | Jackson Center | Jackson Center, OH |
| Ohio | Jacksontown | Jacksontown, OH |
| Ohio | Jacksonville | Jacksonville, OH |
| Ohio | Jacobsburg | Jacobsburg, OH |
| Ohio | Jamestown | Jamestown, OH |
| Ohio | Jasper | Jasper, OH |
| Ohio | Jefferson | Jefferson, OH |
| Ohio | Jeffersonville | Jeffersonville, OH |
| Ohio | Jenera | Jenera, OH |
| Ohio | Jeromesville | Jeromesville, OH |
| Ohio | Jerry City | Jerry City, OH |
| Ohio | Jerusalem | Jerusalem, OH |
| Ohio | Jewell | Jewell, OH |
| Ohio | Jewett | Jewett, OH |
| Ohio | Johnstown | Johnstown, OH |
| Ohio | Junction City | Junction City, OH |
| Ohio | Kalida | Kalida, OH |
| Ohio | Kansas | Kansas, OH |
| Ohio | Keene | Keene, OH |
| Ohio | Kelleys Island | Kelleys Island, OH |
| Ohio | Kensington | Kensington, OH |
| Ohio | Kent | Kent, OH |