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U.S. ZIP Codes Database 2026

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San Juan County ZIP Codes

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

County State ZIP Code City Area Codes
San Juan County NM 87417 Kirtland 505
San Juan County NM 87418 La Plata 505, 970
San Juan County NM 87419 Navajo Dam 505, 575, 970
San Juan County NM 87420 Shiprock 505, 928, 970
San Juan County NM 87421 Waterflow 505
San Juan County NM 87455 Newcomb 505, 928
San Juan County NM 87461 Sanostee 505, 928
San Juan County NM 87499 Farmington 505
San Juan County UT 84510 Aneth 435
San Juan County UT 84511 Blanding 435
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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.