17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Meigs | 1 | 3,789 | 3,787 | 0.21% | 61 | 63 | Township |
| West Union | 2 | 3,108 | 3,006 | 0.65% | 1,098 | 3 | Village |
| Winchester | 3 | 2,256 | 2,220 | 0.94% | 69 | 33 | Township |
| Liberty | 4 | 2,103 | 2,073 | 0.38% | 49 | 43 | Township |
| Manchester | 5 | 1,907 | 1,883 | 0.37% | 793 | 2 | Township |
| Manchester | 6 | 1,862 | 1,841 | 0.22% | 1,470 | 1 | Village |
| Sprigg | 7 | 1,760 | 1,752 | 0.23% | 40 | 44 | Township |
| Peebles | 8 | 1,757 | 1,770 | -0.17% | 1,447 | 1 | Village |
| Bratton | 9 | 1,378 | 1,381 | 0.07% | 43 | 32 | Township |
| Oliver | 10 | 1,346 | 1,344 | 0.3% | 46 | 29 | Township |
| Brush Creek | 11 | 1,097 | 1,096 | 0.09% | 26 | 41 | Township |
| Winchester | 12 | 1,001 | 985 | 0.3% | 383 | 3 | Village |
| Seaman | 13 | 969 | 972 | -0.1% | 908 | 1 | Village |
| Blue Creek | 14 | 698 | 706 | 0% | 19 | 36 | Township |
| Bentonville | 15 | 165 | 178 | -4.62% | 95 | 2 | CDP |
| Manchester | 16 | 118 | 122 | -0.84% | 6 | 18 | Township |
| Cherry Fork | 17 | 44 | 59 | 7.32% | 146 | 0 | CDP |
Meigs is the largest city in Adams County, with a population of 3,789.
Cherry Fork is the smallest city in Adams County, with a population of 44.
There are 17 cities in Adams County, Ohio.