| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hastings | 1 | 25,128 | 25,137 | 0.03% | 1,668 | 15 | City |
| Kenesaw | 2 | 908 | 905 | 0.33% | 859 | 1 | Village |
| Juniata | 3 | 736 | 747 | 0% | 1,090 | 1 | Village |
| Roseland | 4 | 257 | 261 | -0.39% | 931 | 0 | Village |
| Holstein | 5 | 181 | 186 | -0.55% | 715 | 0 | Village |
| Ayr | 6 | 83 | 87 | -1.19% | 343 | 0 | Village |
| Prosser | 7 | 78 | 79 | 0% | 318 | 0 | Village |
| Cowles | 8 | 21 | 21 | 0% | 38 | 1 | Village |
Hastings is the largest city in Adams County, with a population of 25,128.
Cowles is the smallest city in Adams County, with a population of 21.
There are 8 cities in Adams County, Nebraska.