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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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Ozaukee County ZIP Codes

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

County State ZIP Code City Area Codes
Ozaukee County WI 53004 Belgium 262, 920
Ozaukee County WI 53012 Cedarburg 262
Ozaukee County WI 53021 Fredonia 262, 920
Ozaukee County WI 53024 Grafton 262
Ozaukee County WI 53074 Port Washington 262
Ozaukee County WI 53080 Saukville 262
Ozaukee County WI 53092 Mequon 262, 414
Ozaukee County WI 53097 Mequon 262, 414

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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.