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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District of Columbia ZIP Codes

Browse all ZIP Codes, cities, and associated area codes registered in District of Columbia.

County State ZIP Code City Area Codes
District of Columbia DC 20011 Washington 202, 227, 240, 301, 771
District of Columbia DC 20012 Washington 202, 227, 240, 301, 771
District of Columbia DC 20013 Washington 202
District of Columbia DC 20015 Washington 202, 227, 240, 301, 771
District of Columbia DC 20016 Washington 202, 227, 240, 301, 571, 703, 771
District of Columbia DC 20017 Washington 202, 227, 240, 301, 771
District of Columbia DC 20018 Washington 202, 227, 240, 301, 771
District of Columbia DC 20019 Washington 202, 227, 240, 301, 771
District of Columbia DC 20020 Washington 202, 227, 240, 301, 771
District of Columbia DC 20022 Washington 202
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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.