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 81247 Gunnison Gunnison County 970
CO 81248 Sargents Saguache County 719, 970
CO 81251 Twin Lakes Lake County 719, 970
CO 81252 Westcliffe Custer County 719
CO 81253 Wetmore Custer County 719
CO 81290 Florence Fremont County 719
CO 81301 Durango La Plata County 970
CO 81302 Durango La Plata County 970
CO 81303 Durango La Plata County 505, 970
CO 81320 Cahone Dolores 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.