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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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Costilla County ZIP Codes

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

County State ZIP Code City Area Codes
Costilla County CO 81123 Blanca 719
Costilla County CO 81126 Chama 719
Costilla County CO 81133 Fort Garland 719
Costilla County CO 81134 San Luis 719
Costilla County CO 81138 Jaroso 575, 719
Costilla County CO 81152 San Luis 575, 719
Costilla County CO 81153 San Pablo 719

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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.