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 80123 Littleton Jefferson County 303, 720, 983
CO 80124 Lone Tree Douglas County 303, 720, 983
CO 80125 Littleton Douglas County 303, 720, 983
CO 80126 Littleton Douglas County 303, 720, 983
CO 80127 Littleton Jefferson County 303, 720, 983
CO 80128 Littleton Jefferson County 303, 720, 983
CO 80129 Littleton Douglas County 303, 720, 983
CO 80130 Littleton Douglas County 303, 720, 983
CO 80131 Louviers Douglas County 303, 720, 983
CO 80132 Monument El Paso County 303, 719, 720, 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.