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

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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	53408	Racine	Racine County	`262`
WI	53501	Afton	Rock County	`608`
WI	53502	Albany	Green County	`608`
WI	53503	Arena	Iowa County	`608`
WI	53504	Argyle	Lafayette County	`608`
WI	53505	Avalon	Rock County	`608`
WI	53506	Avoca	Iowa County	`608`
WI	53507	Barneveld	Iowa County	`608`
WI	53508	Belleville	Dane County	`608`
WI	53510	Belmont	Lafayette 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.