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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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Oakland County ZIP Codes

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

County State ZIP Code City Area Codes
Oakland County MI 48323 West Bloomfield 248, 947
Oakland County MI 48324 West Bloomfield 248, 947
Oakland County MI 48325 West Bloomfield 248
Oakland County MI 48326 Auburn Hills 248, 947
Oakland County MI 48327 Waterford 248, 947
Oakland County MI 48328 Waterford 248, 947
Oakland County MI 48329 Waterford 248, 947
Oakland County MI 48330 Drayton Plains 248
Oakland County MI 48331 Farmington 248, 947
Oakland County MI 48332 Farmington 248
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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.