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
Maps and coordinates
County directory

Ward County ZIP Codes

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

County State ZIP Code City Area Codes
Howard County MD 21043 Ellicott City 410, 443, 667
Howard County MD 21044 Columbia 227, 240, 301, 410, 443, 667
Howard County MD 21045 Columbia 410, 443, 667
Howard County MD 21046 Columbia 227, 240, 301, 410, 443, 667
Howard County MD 21075 Elkridge 410, 443, 667
Howard County MD 21104 Marriottsville 410, 443, 667
Howard County MD 21150 Simpsonville 410
Howard County MD 21163 Woodstock 410, 443, 667
Howard County MD 21723 Cooksville 410, 443, 667
Howard County MD 21737 Glenelg 227, 240, 301, 410, 443, 667
Page 13 of 20

Geographic Map of Ward County

Postal context

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.