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.

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Denver County ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in Denver County.

County State ZIP Code City Area Codes
Denver County CO 80225 Denver 303
Denver County CO 80230 Denver 303, 720, 983
Denver County CO 80231 Denver 303, 720, 983
Denver County CO 80236 Denver 303, 720, 983
Denver County CO 80237 Denver 303, 720, 983
Denver County CO 80238 Denver 303, 720, 983
Denver County CO 80239 Denver 303, 720, 983
Denver County CO 80243 Denver 303
Denver County CO 80244 Denver 303
Denver County CO 80246 Denver 303, 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.