Find the last 4 digits (ZIP+4) for an address in 21918

ZIP 21918, Conowingo, MD is filled in. Just type the street address.

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ZIP Code 21918 – Conowingo, MD

Conowingo, Maryland · Cecil County · Eastern time

ZIP code21918
CityConowingo
StateMaryland
CountyCecil County
Population4,169
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area17.57 sq mi
Center (lat, long)39.6782, -76.1759

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21918 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

21034 Darlington · 3.6 mi21917 Colora · 4.2 mi17563 Peach Bottom · 5.8 mi21160 Whiteford · 7.1 mi21904 Port Deposit · 7.2 mi19362 Nottingham · 7.5 mi21911 Rising Sun · 7.7 mi21078 Havre De Grace · 8.4 mi

About ZIP 21918

ZIP code 21918 is assigned to Conowingo, Maryland. It lies in Cecil County. Its Census area covers about 17.57 square miles of land. The closest neighboring ZIP is 21034 (Darlington), about 3.6 miles away.

Every address in 21918 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources