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.

42,735 verified records
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State directory

Wisconsin ZIP Codes

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

State ZIP Code City County Area Codes
WI 53535 Edmund Iowa County 608
WI 53536 Evansville Rock County 608
WI 53537 Footville Rock County 608
WI 53538 Fort Atkinson Jefferson County 262, 608, 920
WI 53540 Gotham Richland County 608
WI 53541 Gratiot Lafayette County 608, 779, 815
WI 53542 Hanover Rock County 608
WI 53543 Highland Iowa County 608
WI 53544 Hollandale Iowa County 608
WI 53545 Janesville Rock County 608
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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.