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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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Polk County ZIP Codes

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

County State ZIP Code City Area Codes
Polk County WI 54024 Saint Croix Falls 534, 651, 715
Polk County WI 54026 Star Prairie 534, 715
Polk County WI 54810 Balsam Lake 534, 715
Polk County WI 54824 Centuria 534, 715
Polk County WI 54837 Frederic 534, 715
Polk County WI 54853 Luck 534, 715
Polk County WI 54858 Milltown 534, 715
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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.