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U.S. ZIP Codes Database 2026

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Siskiyou County ZIP Codes

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

County State ZIP Code City Area Codes
Siskiyou County CA 96094 Weed 530
Siskiyou County CA 96097 Yreka 530
Siskiyou County CA 96134 Tulelake 458, 530, 541
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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.