Find the last 4 digits (ZIP+4) for an address in 21639

ZIP 21639, Greensboro, MD is filled in. Just type the street address.

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ZIP Code 21639 – Greensboro, MD

Greensboro, Maryland · Caroline County · Eastern time

ZIP code21639
CityGreensboro
StateMaryland
CountyCaroline County
Population4,682
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area33.09 sq mi
Center (lat, long)38.9587, -75.7825

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21639 (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

21636 Goldsboro · 3.9 mi21660 Ridgely · 5.7 mi21629 Denton · 7.3 mi21640 Henderson · 7.8 mi21641 Hillsboro · 9 mi19952 Harrington · 9.6 mi19943 Felton · 9.9 mi19964 Marydel · 10 mi

About ZIP 21639

ZIP code 21639 is assigned to Greensboro, Maryland. It lies in Caroline County. Its Census area covers about 33.09 square miles of land. The closest neighboring ZIP is 21636 (Goldsboro), about 3.9 miles away.

Every address in 21639 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