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	54205	Casco	Kewaunee County	`920`
WI	54207	Collins	Manitowoc County	`920`
WI	54208	Denmark	Brown County	`920`
WI	54209	Egg Harbor	Door County	`920`
WI	54210	Ellison Bay	Door County	`920`
WI	54211	Ephraim	Door County	`920`
WI	54212	Fish Creek	Door County	`920`
WI	54213	Forestville	Door County	`920`
WI	54214	Francis Creek	Manitowoc County	`920`
WI	54215	Kellnersville	Manitowoc County	`920`

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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.