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
All states and U.S. territories
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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 80425 Buffalo Creek Jefferson County 303, 720, 983
CO 80426 Burns Eagle County 970
CO 80427 Central City Gilpin County 303, 720, 983
CO 80428 Clark Routt County 307, 970
CO 80429 Climax Lake County 719
CO 80430 Coalmont Jackson County 970
CO 80432 Como Park County 719, 970
CO 80433 Conifer Jefferson County 303, 720, 983
CO 80434 Cowdrey Jackson County 307, 970
CO 80435 Dillon Summit County 303, 719, 720, 970, 983
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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.