| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Circleville | 1 | 14,765 | 13,951 | 0.9% | 2,046 | 7 | City |
| Ashville | 2 | 4,870 | 4,552 | 1.06% | 1,967 | 2 | Village |
| Commercial Point | 3 | 3,305 | 3,093 | 1.04% | 709 | 5 | Village |
| Williamsport | 4 | 1,036 | 976 | 0.88% | 584 | 2 | Village |
| New Holland | 5 | 838 | 800 | 0.6% | 532 | 2 | Village |
| Tarlton | 6 | 271 | 254 | 0.74% | 706 | 0 | Village |
Circleville is the largest city in Pickaway County, with a population of 14,765.
Tarlton is the smallest city in Pickaway County, with a population of 271.
There are 6 cities in Pickaway County, Ohio.