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	80720	Akron	Washington County	`970`
CO	80721	Amherst	Phillips County	`308, 970`
CO	80722	Atwood	Logan County	`970`
CO	80723	Brush	Morgan County	`970`
CO	80726	Crook	Logan County	`308, 970`
CO	80727	Eckley	Yuma County	`970`
CO	80728	Fleming	Logan County	`970`
CO	80729	Grover	Weld County	`307, 308, 970`
CO	80731	Haxtun	Phillips County	`970`
CO	80732	Hereford	Weld County	`307, 970`

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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.