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 80237 Denver Denver County 303, 720, 983
CO 80238 Denver Denver County 303, 720, 983
CO 80239 Denver Denver County 303, 720, 983
CO 80241 Thornton Adams County 303, 720, 983
CO 80243 Denver Denver County 303
CO 80244 Denver Denver County 303
CO 80246 Denver Denver County 303, 720, 983
CO 80247 Denver Arapahoe County 303, 720, 983
CO 80248 Denver Denver County 303
CO 80249 Denver Denver County 303, 720, 983
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Geographic Map of Colorado

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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.