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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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Sonoma County ZIP Codes

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

County State ZIP Code City Area Codes
Sonoma County CA 95407 Santa Rosa 707
Sonoma County CA 95409 Santa Rosa 707
Sonoma County CA 95412 Annapolis 707
Sonoma County CA 95416 Boyes Hot Springs 707
Sonoma County CA 95419 Camp Meeker 707
Sonoma County CA 95421 Cazadero 707
Sonoma County CA 95425 Cloverdale 707
Sonoma County CA 95430 Duncans Mills 707
Sonoma County CA 95431 Eldridge 707
Sonoma County CA 95433 El Verano 707
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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.