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
All states and U.S. territories
Maps and coordinates
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 54648 Norwalk Monroe County 608
WI 54649 Oakdale Monroe County 608
WI 54650 Onalaska La Crosse County 608
WI 54651 Ontario Vernon County 608
WI 54652 Readstown Vernon County 608
WI 54653 Rockland La Crosse County 608
WI 54654 Seneca Crawford County 608
WI 54655 Soldiers Grove Crawford County 608
WI 54656 Sparta Monroe County 534, 608, 715
WI 54657 Steuben Crawford County 608
Page 70 of 90

Geographic Map of Wisconsin

Postal context

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.