16 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Jackson | Jackson County | 6,217 |
| Johnstown | Licking County | 5,396 |
| Jefferson | Ashtabula County | 3,180 |
| Jamestown | Greene County | 2,128 |
| Jackson Center | Shelby County | 1,437 |
| Jeffersonville | Fayette County | 1,231 |
| Junction City | Perry County | 723 |
| Jeromesville | Ashland County | 527 |
| Jewett | Harrison County | 527 |
| Jerry City | Wood County | 463 |
| Jersey | Fairfield County | 424 |
| Jacksonville | Athens County | 396 |
| Jacksontown | Licking County | 265 |
| Jenera | Hancock County | 243 |
| Jerusalem | Monroe County | 120 |
| Jacksonburg | Butler County | 53 |