15 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Circleville | 1 | 14,673 | 13,952 | 0.82% | 2,033 | 7 | City |
| Scioto | 2 | 12,187 | 11,719 | 1.15% | 275 | 44 | Township |
| Ashville | 3 | 4,861 | 4,552 | 1.08% | 1,963 | 2 | Village |
| Darby | 4 | 3,481 | 3,217 | 1.69% | 102 | 34 | Township |
| Commercial Point | 5 | 3,285 | 3,092 | 0.98% | 705 | 5 | Village |
| Washington | 6 | 3,214 | 3,006 | 1.52% | 135 | 24 | Township |
| Walnut | 7 | 3,169 | 2,958 | 1.57% | 78 | 41 | Township |
| Saltcreek | 8 | 2,935 | 2,746 | 1.49% | 82 | 36 | Township |
| Circleville | 9 | 2,705 | 2,529 | 1.54% | 287 | 9 | Township |
| Pickaway | 10 | 2,166 | 2,031 | 1.45% | 44 | 49 | Township |
| Deercreek | 11 | 1,713 | 1,600 | 1.54% | 47 | 36 | Township |
| Williamsport | 12 | 1,035 | 978 | 0.98% | 583 | 2 | Village |
| Muhlenberg | 13 | 882 | 833 | 1.26% | 39 | 23 | Township |
| New Holland | 14 | 843 | 806 | 0.72% | 536 | 2 | Village |
| Tarlton | 15 | 271 | 255 | 1.12% | 706 | 0 | Village |
Circleville is the largest city in Pickaway County, with a population of 14,673.
Tarlton is the smallest city in Pickaway County, with a population of 271.
There are 15 cities in Pickaway County, Ohio.