U.S. postal lookup

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.

42,735 verified records
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State directory

Colorado ZIP Codes

Complete postal directory, details, and geographic map for the State of Colorado.

State ZIP Code City County Area Codes
CO 81081 Trinchera Las Animas County 575, 719
CO 81082 Trinidad Las Animas County 575, 719
CO 81084 Two Buttes Baca County 719
CO 81087 Vilas Baca County 719
CO 81089 Walsenburg Huerfano County 719
CO 81090 Walsh Baca County 620, 719
CO 81091 Weston Las Animas County 575, 719
CO 81092 Wiley Prowers County 719
CO 81101 Alamosa Alamosa County 719
CO 81102 Alamosa Alamosa County 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.