ZIP codes in St. Louis County
59 ZIPs touch St. Louis County, Minnesota. The blue dashed line is the county border; orange ZIPs reach into it.
59
ZIP codes
16
cross the county line
238,499
people in these ZIPs
87
counties in MN
Most people
St. Louis County ZIP list
More counties in Minnesota
- Rice County17
- Rock County11
- Roseau County12
- Scott County10
- Sherburne County10
- Sibley County16
- Stearns County42
- Steele County11
- Stevens County8
- Swift County11
- Todd County19
- Traverse County9
Questions people actually ask
How many ZIP codes are in St. Louis County, Minnesota?
59 ZIP codes reach into St. Louis County, including 7 PO Box or single-address ZIPs placed by the town they serve. 16 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in St. Louis County has the most people?
55811 (Duluth) has about 28,118 residents, the most of any ZIP touching St. Louis County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in St. Louis County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in St. Louis County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from