10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Anamosa | 1 | 5,872 | 5,451 | 1.45% | 2,326 | 2.52 | City |
| Monticello | 2 | 4,062 | 4,046 | 0.07% | 722 | 5.63 | City |
| Olin | 3 | 654 | 656 | 0% | 640 | 1.02 | City |
| Wyoming | 4 | 529 | 524 | 0.19% | 1,091 | 0.48 | City |
| Oxford Junction | 5 | 422 | 427 | -0.24% | 651 | 0.65 | City |
| Martelle | 6 | 245 | 249 | -0.41% | 788 | 0.31 | City |
| Onslow | 7 | 194 | 198 | -0.51% | 1,000 | 0.19 | City |
| Center Junction | 8 | 169 | 102 | 6.96% | 230 | 0.73 | CDP |
| Morley | 9 | 94 | 94 | 0% | 1,093 | 0.09 | City |
| Stone City | 10 | 84 | 60 | -8.7% | 48 | 1.76 | CDP |
Anamosa is the largest city in Jones County, with a population of 5,872.
Stone City is the smallest city in Jones County.
There are 10 cities in Jones County, Iowa.