42 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 55811 | Duluth | 27,832 |
| 55803 | Duluth | 17,734 |
| 55746 | Hibbing | 16,963 |
| 55804 | Duluth | 16,118 |
| 55812 | Duluth | 11,391 |
| 55805 | Duluth | 10,057 |
| 55792 | Virginia | 9,983 |
| 55807 | Duluth | 9,496 |
| 55806 | Duluth | 9,269 |
| 55810 | Duluth | 8,026 |
| 55734 | Eveleth | 6,437 |
| 55719 | Chisholm | 5,678 |
| 55808 | Duluth | 5,312 |
| 55779 | Saginaw | 3,933 |
| 55705 | Aurora | 3,235 |
| 55741 | Gilbert | 3,112 |
| 55802 | Duluth | 2,692 |
| 55768 | Mountain Iron | 2,649 |
| 55750 | Hoyt Lakes | 2,100 |
| 55723 | Cook | 1,925 |
| 55790 | Tower | 1,871 |
| 55706 | Babbitt | 1,716 |
| 55771 | Orr | 1,601 |
| 55710 | Britt | 1,470 |
| 55732 | Embarrass | 1,455 |
| 55751 | Iron | 1,343 |
| 55736 | Floodwood | 1,251 |
| 55713 | Buhl | 1,081 |
| 55703 | Angora | 898 |
| 55724 | Cotton | 784 |
| 55708 | Biwabik | 749 |
| 55765 | Meadowlands | 735 |
| 55738 | Forbes | 603 |
| 55711 | Brookston | 560 |
| 55763 | Makinen | 464 |
| 55702 | Alborn | 458 |
| 55782 | Soudan | 431 |
| 55814 | Duluth | 380 |
| 55602 | Brimson | 321 |
| 55717 | Canyon | 252 |
| 55758 | Kinney | 148 |
| 55725 | Crane Lake | 99 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 42 ZCTAs in St. Louis County, Minnesota (US Census).