12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dodgeville | 1 | 5,154 | 4,981 | 0.68% | 1,269 | 4.06 | City |
| Mineral Point | 2 | 2,551 | 2,580 | -0.24% | 830 | 3.08 | City |
| Barneveld | 3 | 1,329 | 1,328 | 0% | 693 | 1.92 | Village |
| Highland | 4 | 862 | 874 | -0.23% | 757 | 1.14 | Village |
| Arena | 5 | 859 | 843 | 0.35% | 744 | 1.15 | Village |
| Ridgeway | 6 | 685 | 630 | 1.63% | 534 | 1.28 | Village |
| Avoca | 7 | 547 | 557 | -0.36% | 243 | 2.25 | Village |
| Linden | 8 | 493 | 502 | -0.4% | 632 | 0.78 | Village |
| Cobb | 9 | 483 | 482 | 0% | 470 | 1.03 | Village |
| Hollandale | 10 | 300 | 310 | -0.66% | 412 | 0.73 | Village |
| Rewey | 11 | 263 | 258 | 0.38% | 519 | 0.51 | Village |
| Edmund | 12 | 173 | 117 | 0% | 506 | 0.34 | CDP |
Dodgeville is the largest city in Iowa County, with a population of 5,154.
Edmund is the smallest city in Iowa County.
There are 12 cities in Iowa County, Wisconsin.