8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Anamosa | 1 | 6,043 | 5,448 | 1.67% | 2,394 | 3 | City |
| Monticello | 2 | 4,118 | 4,048 | 0.29% | 732 | 6 | City |
| Olin | 3 | 650 | 655 | -0.15% | 636 | 1 | City |
| Wyoming | 4 | 525 | 527 | 0% | 1,082 | 0 | City |
| Oxford Junction | 5 | 422 | 427 | -0.24% | 651 | 1 | City |
| Martelle | 6 | 249 | 251 | 0% | 801 | 0 | City |
| Onslow | 7 | 197 | 199 | 0% | 1,015 | 0 | City |
| Morley | 8 | 94 | 94 | 0% | 1,093 | 0 | City |
Anamosa is the largest city in Jones County, with a population of 6,043.
Morley is the smallest city in Jones County, with a population of 94.
There are 8 cities in Jones County, Iowa.