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 80436 Dumont Clear Creek County 303, 720, 970, 983
CO 80437 Evergreen Jefferson County 303
CO 80438 Empire Clear Creek County 303, 720, 970, 983
CO 80439 Evergreen Jefferson County 303, 720, 983
CO 80440 Fairplay Park County 719, 970
CO 80442 Fraser Grand County 970
CO 80443 Frisco Summit County 719, 970
CO 80444 Georgetown Clear Creek County 303, 720, 970, 983
CO 80446 Granby Grand County 303, 720, 970, 983
CO 80447 Grand Lake Grand County 303, 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.