This table ranks all 18 ZIP codes in the Iron Mountain, MI-WI MSA by estimated 2022 population, from highest to lowest.
| # | ZIP Code | Place Name | Population (2022) |
|---|---|---|---|
| 1 | ZIP 49801 | Iron Mountain | 11,504 |
| 2 | ZIP 49802 | Kingsford | 6,034 |
| 3 | ZIP 49920 | Crystal Falls | 4,207 |
| 4 | ZIP 49870 | Norway | 3,510 |
| 5 | ZIP 54151 | Niagara | 3,484 |
| 6 | ZIP 54121 | Florence | 3,165 |
| 7 | ZIP 49892 | Vulcan | 2,057 |
| 8 | ZIP 49876 | Quinnesec | 1,262 |
| 9 | ZIP 54542 | Long Lake | 648 |
| 10 | ZIP 49834 | Foster City | 583 |
| 11 | ZIP 49831 | Felch | 569 |
| 12 | ZIP 54103 | Armstrong Creek | 499 |
| 13 | ZIP 49881 | Sagola | 357 |
| 14 | ZIP 49815 | Channing | 205 |
| 15 | ZIP 54120 | Fence | 182 |
| 16 | ZIP 49852 | Loretto | 133 |
| 17 | ZIP 49873 | Perronville | 99 |
| 18 | ZIP 49877 | Ralph | 10 |