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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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Cecil County ZIP Codes

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

County State ZIP Code City Area Codes
Cecil County MD 21917 Colora 410, 443, 667
Cecil County MD 21918 Conowingo 223, 410, 443, 667, 717
Cecil County MD 21919 Earleville 410, 443, 667
Cecil County MD 21920 Elk Mills 410, 443, 667
Cecil County MD 21921 Elkton 302, 410, 443, 484, 610, 667, 835
Cecil County MD 21922 Elkton 410
Cecil County MD 21930 Georgetown 410, 443, 667
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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.