10 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Athens | 1 | 25,325 | 23,821 | 1% | 2,546 | 10 | City |
| Nelsonville | 2 | 4,532 | 4,600 | -0.24% | 969 | 5 | City |
| Glouster | 3 | 1,638 | 1,665 | -0.24% | 1,251 | 1 | Village |
| Albany | 4 | 1,016 | 1,003 | 0.2% | 763 | 1 | Village |
| Chauncey | 5 | 948 | 954 | -0.11% | 1,724 | 1 | Village |
| Buchtel | 6 | 517 | 522 | -0.19% | 1,100 | 0 | Village |
| Coolville | 7 | 444 | 452 | -0.22% | 453 | 1 | Village |
| Jacksonville | 8 | 395 | 401 | -0.25% | 1,646 | 0 | Village |
| Trimble | 9 | 329 | 328 | 0% | 484 | 1 | Village |
| Amesville | 10 | 166 | 171 | -0.6% | 731 | 0 | Village |
Athens is the largest city in Athens County, with a population of 25,325.
Amesville is the smallest city in Athens County, with a population of 166.
There are 10 cities in Athens County, Ohio.