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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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Amador County ZIP Codes

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

County State ZIP Code City Area Codes
Amador County CA 95689 Volcano 209, 350, 530
Amador County CA 95699 Drytown 209, 350
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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.