18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Meigs township | 1 | 3,761 | 3,787 | -0.08% | 60 | 62.59 | Township |
| West Union | 2 | 3,081 | 3,005 | 0.49% | 1,088 | 2.83 | Village |
| Winchester township | 3 | 2,220 | 2,220 | 0.09% | 68 | 32.67 | Township |
| Liberty township | 4 | 2,085 | 2,074 | 0.19% | 48 | 43.21 | Township |
| Manchester township | 5 | 1,892 | 1,882 | 0.16% | 787 | 2.40 | Township |
| Manchester | 6 | 1,844 | 1,838 | 0.05% | 1,455 | 1.27 | Village |
| Peebles | 7 | 1,751 | 1,771 | -0.23% | 1,442 | 1.21 | Village |
| Sprigg township | 8 | 1,736 | 1,751 | -0.17% | 39 | 44.35 | Township |
| Bratton township | 9 | 1,374 | 1,380 | -0.07% | 43 | 32.15 | Township |
| Oliver township | 10 | 1,343 | 1,346 | -0.07% | 46 | 28.96 | Township |
| Brush Creek township | 11 | 1,097 | 1,093 | 0.09% | 26 | 41.48 | Township |
| Winchester | 12 | 977 | 986 | -0.2% | 373 | 2.62 | Village |
| Seaman | 13 | 968 | 973 | -0.1% | 907 | 1.07 | Village |
| Blue Creek township | 14 | 695 | 707 | -0.43% | 19 | 36.31 | Township |
| Bentonville | 15 | 165 | 178 | -4.62% | 95 | 1.74 | CDP |
| Manchester township | 16 | 123 | 121 | 0.82% | 7 | 18.22 | Township |
| Rome (Stout) | 17 | 83 | 82 | 0% | 361 | 0.23 | Village |
| Cherry Fork | 18 | 44 | 59 | 7.32% | 146 | 0.30 | CDP |
Meigs township is the largest city in Adams County, with a population of 3,761.
Cherry Fork is the smallest city in Adams County.
There are 18 cities in Adams County, Ohio.