| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Iron River | 1 | 3,034 | 3,005 | 0.23% | 450 | 7 | City |
| Crystal Falls | 2 | 1,674 | 1,656 | -0.12% | 7.0 | 228 | Township |
| Crystal Falls | 3 | 1,611 | 1,594 | 0.25% | 461 | 3 | City |
| Stambaugh | 4 | 1,211 | 1,196 | -0.08% | 7.0 | 182 | Township |
| Iron River | 5 | 1,052 | 1,038 | 0% | 4.0 | 238 | Township |
| Bates | 6 | 943 | 930 | 0% | 8.0 | 126 | Township |
| Caspian | 7 | 820 | 810 | 0.24% | 575 | 1 | City |
| Mastodon | 8 | 587 | 578 | 0% | 5.0 | 127 | Township |
| Gaastra | 9 | 320 | 316 | 0.31% | 196 | 2 | City |
| Hematite | 10 | 275 | 271 | 0% | 2.0 | 153 | Township |
| Mansfield | 11 | 241 | 236 | 0% | 2.0 | 99 | Township |
| Alpha | 12 | 124 | 123 | 0% | 132 | 1 | Village |
Iron River is the largest city in Iron County, with a population of 3,034.
Alpha is the smallest city in Iron County, with a population of 124.
There are 12 cities in Iron County, Michigan.