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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.

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Winnebago County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Winnebago County.

County State ZIP Code City Area Codes
Winnebago County WI 54927 Butte Des Morts 920
Winnebago County WI 54934 Eureka 920
Winnebago County WI 54947 Larsen 920
Winnebago County WI 54952 Menasha 920
Winnebago County WI 54956 Neenah 920
Winnebago County WI 54957 Neenah 920
Winnebago County WI 54963 Omro 920
Winnebago County WI 54964 Pickett 920
Winnebago County WI 54980 Waukau 920
Winnebago County WI 54985 Winnebago 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.