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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Wisconsin ZIP Codes

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

State ZIP Code City County Area Codes
WI 54726 Boyd Chippewa County 534, 715
WI 54727 Cadott Chippewa County 534, 715
WI 54728 Chetek Barron County 534, 715
WI 54729 Chippewa Falls Chippewa County 534, 715
WI 54730 Colfax Dunn County 534, 715
WI 54731 Conrath Rusk County 534, 715
WI 54732 Cornell Chippewa County 534, 715
WI 54733 Dallas Barron County 534, 715
WI 54734 Downing Dunn County 534, 715
WI 54735 Downsville Dunn County 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.