County ZIP codes · Minnesota · FIPS 27137
St. Louis County, MN ZIP Codes
St. Louis County, Minnesota has 58 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 51 residential and 7 for PO boxes or a single organization. 42 of the residential ones lie mainly in St. Louis County and 9 mainly in a neighboring county; 15 cross the county line. Median household income ranges from $42,833 in 55806 to $111,228 in 55804 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of St. Louis County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $59,036 and $76,127.
They carry 41 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 51 residential ZIP codes in St. Louis County
42 ZIP codes lie mainly in St. Louis County; 9 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 55811 | Duluth | 28,118 | 436 | $80k | $321k | 100% |
| 55803 | Duluth | 17,662 | 60 | $106k | $336k | 100% |
| 55746 | Hibbing | 16,730 | 48 | $56k | $135k | 93% |
| 55804 | Duluth | 15,922 | 169 | $111k | $315k | 100% |
| 55812 | Duluth | 10,859 | 5,609 | $66k | $323k | 100% |
| 55805 | Duluth | 10,602 | 7,347 | $43k | $189k | 100% |
| 55807 | Duluth | 9,763 | 1,686 | $62k | $178k | 100% |
| 55792 | Virginia | 9,663 | 101 | $54k | $130k | 100% |
| 55806 | Duluth | 9,356 | 2,734 | $43k | $161k | 100% |
| 55810 | Duluth | 8,285 | 175 | $85k | $242k | 94% |
| 55734 | Eveleth | 6,265 | 80 | $63k | $159k | 100% |
| 55808 | Duluth | 5,691 | 474 | $62k | $174k | 100% |
| 55719 | Chisholm | 5,613 | 67 | $54k | $123k | 100% |
| 55779 | Saginaw | 3,905 | 32 | $94k | $283k | 100% |
| 55705 | Aurora | 3,211 | 38 | $56k | $124k | 100% |
| 55768 | Mountain Iron | 2,964 | 33 | $86k | $199k | 100% |
| 55741 | Gilbert | 2,947 | 42 | $70k | $165k | 100% |
| 55802 | Duluth | 2,399 | 928 | $52k | $494k | 100% |
| 55750 | Hoyt Lakes | 2,068 | 12 | $66k | $93k | 100% |
| 55723 | Cook | 1,927 | 5 | $65k | $190k | 72% |
| 55790 | Tower | 1,847 | 13 | $77k | $329k | 100% |
| 55706 | Babbitt | 1,703 | 13 | $57k | $113k | 100% |
| 55771 | Orr | 1,484 | 1 | $68k | $169k | 72% |
| 55732 | Embarrass | 1,453 | 7 | $65k | $179k | 100% |
| 55751 | Iron | 1,388 | 23 | $75k | $202k | 100% |
| 55710 | Britt | 1,362 | 16 | $87k | $280k | 100% |
| 55736 | Floodwood | 1,344 | 4 | $65k | $165k | 93% |
| 55713 | Buhl | 1,048 | 141 | $59k | $129k | 100% |
| 55708 | Biwabik | 929 | 192 | $66k | $110k | 100% |
| 55703 | Angora | 906 | 6 | $72k | $175k | 100% |
| 55765 | Meadowlands | 803 | 6 | $75k | $203k | 100% |
| 55724 | Cotton | 707 | 3 | $75k | $227k | 100% |
| 55738 | Forbes | 599 | 5 | $83k | $167k | 100% |
| 55711 | Brookston | 540 | 7 | $61k | $208k | 100% |
| 55763 | Makinen | 495 | 3 | $81k | $210k | 100% |
| 55782 | Soudan | 420 | 39 | $56k | $110k | 100% |
| 55702 | Alborn | 412 | 8 | $78k | $295k | 100% |
| 55602 | Brimson | 346 | 1 | $74k | $248k | 92% |
| 55814 | Duluth | 319 | 4,090 | – | – | 100% |
| 55717 | Canyon | 287 | 2 | $97k | $317k | 100% |
| 55758 | Kinney | 121 | 72 | $57k | $151k | 100% |
| 55725 | Crane Lake | 89 | 1 | $73k | $407k | 100% |
Partly in St. Louis County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 55731 | Ely | 5,361 | 3 | $62k | $206k | 50% |
| 55796 | Winton | 135 | 616 | $52k | $96k | 44% |
| 55781 | Side Lake | 821 | 10 | $101k | $393k | 44% |
| 55720 | Cloquet | 17,448 | 112 | $64k | $223k | 41% |
| 56649 | International Falls | 8,825 | 31 | $65k | $154k | 38% |
| 55798 | Wright | 627 | 6 | $78k | $233k | 17% |
| 55616 | Two Harbors | 7,250 | 15 | $76k | $259k | 9% |
| 56669 | Kabetogama | 264 | 1 | $65k | $272k | 8% |
| 55772 | Nett Lake | 77 | 374 | – | $157k | 7% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
15 ZIP codes of St. Louis County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In St. Louis | Elsewhere |
|---|---|---|
| 55720 | 41% | Carlton County 59% |
| 55746 | 93% | Itasca County 7% |
| 56649 | 38% | Koochiching County 62% |
| 55810 | 94% | Carlton County 6% |
| 55616 | 9% | Lake County 91% |
| 55731 | 50% | Lake County 50% |
| 55723 | 72% | Itasca County 28% |
| 55771 | 72% | Koochiching County 28% |
| 55736 | 93% | Itasca County 7% |
| 55781 | 44% | Itasca County 56% |
| 55798 | 17% | Carlton County 73%; Aitkin County 10% |
| 55602 | 92% | Lake County 8% |
| 56669 | 8% | Koochiching County 92% |
| 55796 | 44% | Lake County 56% |
| 55772 | 7% | Koochiching County 93% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do St. Louis County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. St. Louis County's ZIP codes use 4 prefixes: 556, 557, 558 and 566.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 556 | Duluth, MN (SCF 556) | 2 | 13 |
| 557 | Duluth, MN (SCF 556) | 40 | 75 |
| 558 | Duluth, MN (SCF 556) | 14 | 14 |
| 566 | St Paul, MN (SCF 550) | 2 | 53 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.