16 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Jackson | Jackson County | 6,209 |
| Johnstown | Licking County | 5,437 |
| Jefferson | Ashtabula County | 3,173 |
| Jamestown | Greene County | 2,143 |
| Jackson Center | Shelby County | 1,436 |
| Jeffersonville | Fayette County | 1,227 |
| Junction City | Perry County | 723 |
| Jeromesville | Ashland County | 526 |
| Jewett | Harrison County | 522 |
| Jerry City | Wood County | 465 |
| Jersey | Fairfield County | 438 |
| Jacksonville | Athens County | 395 |
| Jacksontown | Licking County | 319 |
| Jenera | Hancock County | 242 |
| Jerusalem | Monroe County | 119 |
| Jacksonburg | Butler County | 53 |