7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chillicothe | 1 | 21,633 | 22,041 | -0.31% | 2,060 | 11 | City |
| Kingston | 2 | 1,225 | 1,258 | -0.41% | 3,311 | 0 | Village |
| Frankfort | 3 | 1,087 | 1,116 | -0.46% | 2,165 | 1 | Village |
| Bainbridge | 4 | 740 | 760 | -0.4% | 1,454 | 1 | Village |
| Clarksburg | 5 | 396 | 407 | -0.5% | 2,491 | 0 | Village |
| Adelphi | 6 | 308 | 317 | -0.32% | 1,124 | 0 | Village |
| South Salem | 7 | 207 | 212 | -0.48% | 1,150 | 0 | Village |
Chillicothe is the largest city in Ross County, with a population of 21,633.
South Salem is the smallest city in Ross County, with a population of 207.
There are 7 cities in Ross County, Ohio.