9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lac Flambeau | 1 | 1,702 | 1,737 | -0.99% | 344 | 5 | CDP |
| Hurley | 2 | 1,621 | 1,564 | 0.68% | 524 | 3 | City |
| Hurley | 3 | 1,621 | 1,566 | 0.68% | 524 | 3 | City |
| Montreal | 4 | 790 | 801 | -0.38% | 356 | 2 | City |
| Montreal | 5 | 790 | 802 | -0.38% | 356 | 2 | City |
| Mercer | 6 | 537 | 507 | 0.19% | 121 | 4 | CDP |
| Iron Belt | 7 | 174 | 151 | 0% | 71 | 2 | CDP |
| Pence | 8 | 119 | 95 | 0% | 111 | 1 | CDP |
| Saxon | 9 | 72 | 58 | 5.88% | 59 | 1 | CDP |
Lac Flambeau is the largest city in Iron County, with a population of 1,702.
Saxon is the smallest city in Iron County, with a population of 72.
There are 9 cities in Iron County, Wisconsin.