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	81427	Ouray	Ouray County	`970`
CO	81428	Paonia	Delta County	`970`
CO	81429	Paradox	Montrose County	`435, 970`
CO	81430	Placerville	San Miguel County	`970`
CO	81431	Redvale	Montrose County	`970`
CO	81432	Ridgway	Ouray County	`970`
CO	81433	Silverton	San Juan County	`970`
CO	81434	Somerset	Gunnison County	`970`
CO	81435	Telluride	San Miguel County	`970`
CO	81501	Grand Junction	Mesa County	`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.