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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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Aitkin County ZIP Codes

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

County State ZIP Code City Area Codes
Aitkin County MN 55748 Hill City 218
Aitkin County MN 55752 Jacobson 218
Aitkin County MN 55760 Mcgregor 218, 320
Aitkin County MN 55785 Swatara 218
Aitkin County MN 55787 Tamarack 218
Aitkin County MN 56350 Mc Grath 218, 320
Aitkin County MN 56431 Aitkin 218, 320
Aitkin County MN 56469 Palisade 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.