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U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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St. Louis County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in St. Louis County.

County State ZIP Code City Area Codes
St. Louis County MN 55777 Virginia 218
St. Louis County MN 55779 Saginaw 218
St. Louis County MN 55781 Side Lake 218
St. Louis County MN 55782 Soudan 218
St. Louis County MN 55790 Tower 218
St. Louis County MN 55792 Virginia 218
St. Louis County MN 55796 Winton 218
St. Louis County MN 55802 Duluth 218, 534, 715
St. Louis County MN 55803 Duluth 218
St. Louis County MN 55804 Duluth 218
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About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.