15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Athens | 1 | 25,239 | 23,824 | 1.13% | 2,538 | 9.95 | City |
| Nelsonville | 2 | 4,464 | 4,598 | -0.6% | 954 | 4.68 | City |
| The Plains | 3 | 2,635 | 2,813 | -1.13% | 1,156 | 2.28 | CDP |
| Glouster | 4 | 1,608 | 1,660 | -0.62% | 1,228 | 1.31 | Village |
| Chauncey | 5 | 933 | 960 | -0.53% | 1,696 | 0.55 | Village |
| Albany | 6 | 922 | 926 | -0.11% | 692 | 1.33 | Village |
| Buchtel | 7 | 509 | 519 | -0.39% | 1,083 | 0.47 | Village |
| Coolville | 8 | 440 | 452 | -0.45% | 449 | 0.98 | Village |
| Jacksonville | 9 | 390 | 404 | -0.76% | 1,625 | 0.24 | Village |
| Stewart | 10 | 338 | 326 | 1.81% | 1,142 | 0.30 | CDP |
| Trimble | 11 | 320 | 325 | -0.31% | 471 | 0.68 | Village |
| Millfield | 12 | 237 | 293 | -2.87% | 418 | 0.57 | CDP |
| Amesville | 13 | 168 | 173 | -0.59% | 740 | 0.23 | Village |
| New Marshfield | 14 | 148 | 236 | -7.5% | 378 | 0.39 | CDP |
| Hockingport | 15 | 15 | 144 | -46.43% | 35 | 0.43 | CDP |
Athens is the largest city in Athens County, with a population of 25,239.
Hockingport is the smallest city in Athens County.
There are 15 cities in Athens County, Ohio.