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U.S. ZIP Codes Database 2026

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San Luis Obispo County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in San Luis Obispo County.

County State ZIP Code City Area Codes
San Luis Obispo County CA 93401 San Luis Obispo 805, 820
San Luis Obispo County CA 93402 Los Osos 805, 820
San Luis Obispo County CA 93403 San Luis Obispo 805
San Luis Obispo County CA 93405 San Luis Obispo 805, 820
San Luis Obispo County CA 93406 San Luis Obispo 805
San Luis Obispo County CA 93407 San Luis Obispo 805, 820
San Luis Obispo County CA 93408 San Luis Obispo 805, 820
San Luis Obispo County CA 93409 San Luis Obispo 805, 820
San Luis Obispo County CA 93410 San Luis Obispo 805, 820
San Luis Obispo County CA 93412 Los Osos 805
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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.