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.

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Orange County ZIP Codes

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

County State ZIP Code City Area Codes
Orange County CA 90720 Los Alamitos 562, 657, 714
Orange County CA 90721 Los Alamitos 562
Orange County CA 90740 Seal Beach 562, 657, 714
Orange County CA 90742 Sunset Beach 562, 657, 714
Orange County CA 90743 Surfside 562
Orange County CA 92602 Irvine 657, 714, 949
Orange County CA 92603 Irvine 949
Orange County CA 92604 Irvine 949
Orange County CA 92605 Huntington Beach 714
Orange County CA 92606 Irvine 657, 714, 949
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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.