ZIP codes

ZIP codes in St. Louis County, Minnesota

St. Louis County has 51 ZIP codes. 36 lie entirely inside it and 15 are shared with neighboring counties, so part of their land and their people are elsewhere. About 199,704 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 51; 1 more just touches the border (under 1% of their land)
Entirely inside: 36; 99% or more of their land
Shared with other counties: 15; Most with Itasca County (4)
Most populated ZIP: 55811; 28,118 people · Hermantown
Least populated ZIP: 55725; 89 people
Largest ZIP by land: 55771; 1,115 sq mi · Nett Lake

Map of the ZIP codes in St. Louis County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in St. Louis County

51 ZIP codes in St. Louis County, MN, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
55602	—	346	92%	≈ 276
55616	Two Harbors	7,250	9.0%	≈ 930
55702	—	412	100%	412
55703	—	906	100%	906
55705	Biwabik	3,211	100%	3,211
55706	Babbitt	1,703	100%	1,703
55708	Biwabik	929	100%	929
55710	Mountain Iron	1,362	100%	1,362
55711	Brookston	540	100%	540
55713	Buhl	1,048	100%	1,048
55717	—	287	100%	287
55719	Chisholm	5,613	100%	5,613
55720	Cloquet	17,448	41%	≈ 2,283
55723	Cook	1,927	72%	≈ 1,656
55724	—	707	100%	707
55725	—	89	100%	89
55731	Ely	5,361	50%	≈ 4,630
55732	Babbitt	1,453	100%	1,453
55734	Eveleth	6,265	100%	6,265
55736	Floodwood	1,344	93%	≈ 1,200
55738	—	599	100%	599
55741	Gilbert	2,947	100%	2,947
55746	Hibbing	16,730	93%	≈ 16,466
55750	Hoyt Lakes	2,068	100%	2,068
55751	Mountain Iron	1,388	100%	1,388
55758	Kinney	121	100%	121
55763	—	495	100%	495
55765	Meadowlands	803	100%	803
55768	Mountain Iron	2,964	100%	2,964
55771	Nett Lake	1,484	72%	≈ 962
55772	Nett Lake	77	6.8%	≈ 2
55779	—	3,905	100%	3,905
55781	—	821	44%	≈ 560
55782	Soudan	420	100%	420
55790	Tower	1,847	100%	1,847
55792	Virginia	9,663	100%	9,663
55796	Winton	135	44%	≈ 116
55798	Wright	627	17%	≈ 89
55802	Duluth	2,399	100%	2,399
55803	Rice Lake	17,662	100%	17,662
55804	Duluth	15,922	100%	15,922
55805	Duluth	10,602	100%	10,602
55806	Duluth	9,356	100%	9,356
55807	Duluth	9,763	100%	9,763
55808	Duluth	5,691	100%	5,691
55810	Hermantown	8,285	94%	≈ 7,938
55811	Hermantown	28,118	100%	28,118
55812	Duluth	10,859	100%	10,859
55814	Hermantown	319	100%	319
56649	International Falls	8,825	38%	≈ 134
56669	—	264	7.6%	≈ 6

They also touch the county with under 1% of their land, so they aren’t counted: 55733.

ZIP codes shared with other counties

These 15 ZIP codes have part of their land in another county. The first figure is the share of their land in St. Louis County; then, where the rest lies.

55602: 92% here; 7.7% in Lake County.
55616 (Two Harbors): 9.0% here; 91% in Lake County.
55720 (Cloquet): 41% here; 59% in Carlton County.
55723 (Cook): 72% here; 28% in Itasca County.
55731 (Ely): 50% here; 50% in Lake County.
55736 (Floodwood): 93% here; 7.1% in Itasca County.
55746 (Hibbing): 93% here; 7.3% in Itasca County.
55771 (Nett Lake): 72% here; 28% in Koochiching County.
55772 (Nett Lake): 6.8% here; 93% in Koochiching County.
55781: 44% here; 56% in Itasca County.
55796 (Winton): 44% here; 56% in Lake County.
55798 (Wright): 17% here; 73% in Carlton County and 10.0% in Aitkin County.
55810 (Hermantown): 94% here; 6.1% in Carlton County.
56649 (International Falls): 38% here; 62% in Koochiching County.
56669: 7.6% here; 92% in Koochiching County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Duluth (7), Hermantown (3), Mountain Iron (3), Babbitt (2), Biwabik (2), and Nett Lake (2); 27 places in all.

They start with 4 different three-digit prefixes, one per USPS sorting center: 556, 557, 558, and 566.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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