12 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Iron River | 1 | 3,025 | 3,000 | 0.13% | 449 | 7 | City |
| Crystal Falls | 2 | 1,667 | 1,656 | -0.06% | 7 | 228 | Township |
| Crystal Falls | 3 | 1,605 | 1,592 | 0.12% | 460 | 3 | City |
| Stambaugh | 4 | 1,206 | 1,198 | -0.08% | 7 | 182 | Township |
| Iron River | 5 | 1,040 | 1,033 | -0.1% | 4 | 238 | Township |
| Bates | 6 | 938 | 930 | -0.11% | 7 | 126 | Township |
| Caspian | 7 | 821 | 811 | 0.24% | 575 | 1 | City |
| Mastodon | 8 | 585 | 578 | 0% | 5 | 127 | Township |
| Gaastra | 9 | 319 | 316 | 0.31% | 195 | 2 | City |
| Hematite | 10 | 271 | 270 | -0.37% | 2 | 153 | Township |
| Mansfield | 11 | 238 | 235 | 0% | 2 | 99 | Township |
| Alpha | 12 | 126 | 123 | 0.8% | 134 | 1 | Village |
Iron River is the largest city in Iron County, with a population of 3,025.
Alpha is the smallest city in Iron County, with a population of 126.
There are 12 cities in Iron County, Michigan.