U.S. postal lookup

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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Wisconsin ZIP Codes

Complete postal directory, details, and geographic map for the State of Wisconsin.

State ZIP Code City County Area Codes
WI 54447 Lublin Taylor County 534, 715
WI 54448 Marathon Marathon County 534, 715
WI 54449 Marshfield Wood County 534, 715
WI 54450 Mattoon Shawano County 534, 715
WI 54451 Medford Taylor County 534, 715
WI 54452 Merrill Lincoln County 534, 715
WI 54454 Milladore Wood County 534, 715
WI 54455 Mosinee Marathon County 534, 715
WI 54456 Neillsville Clark County 534, 715
WI 54457 Nekoosa Wood County 534, 608, 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.