11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Dodgeville | 1 | 5,124 | 4,983 | 0.47% | 1,261 | 4 | City |
| Mineral Point | 2 | 2,550 | 2,579 | -0.2% | 829 | 3 | City |
| Barneveld | 3 | 1,334 | 1,325 | 0.15% | 636 | 2 | Village |
| Arena | 4 | 916 | 849 | 1.22% | 794 | 1 | Village |
| Highland | 5 | 866 | 875 | -0.12% | 761 | 1 | Village |
| Ridgeway | 6 | 669 | 633 | 0.9% | 521 | 1 | Village |
| Avoca | 7 | 547 | 558 | -0.36% | 243 | 2 | Village |
| Linden | 8 | 491 | 500 | -0.2% | 629 | 1 | Village |
| Cobb | 9 | 485 | 485 | 0% | 472 | 1 | Village |
| Hollandale | 10 | 301 | 310 | -0.33% | 413 | 1 | Village |
| Rewey | 11 | 250 | 255 | -0.4% | 493 | 1 | Village |
Dodgeville is the largest city in Iowa County, with a population of 5,124.
Rewey is the smallest city in Iowa County, with a population of 250.
There are 11 cities in Iowa County, Wisconsin.