Find the last 4 digits (ZIP+4) for an address in 21640

ZIP 21640, Henderson, MD is filled in. Just type the street address.

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ZIP Code 21640 – Henderson, MD

Henderson, Maryland · Caroline County · Eastern time

ZIP code21640
CityHenderson
StateMaryland
CountyCaroline CountyQueen Anne's County
Population1,163
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area25.66 sq mi
Center (lat, long)39.0681, -75.8209

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21640 (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 mi21644 Ingleside · 4.4 mi21607 Barclay · 4.9 mi19964 Marydel · 5.5 mi21670 Templeville · 5.5 mi21649 Marydel · 5.7 mi21639 Greensboro · 7.8 mi21660 Ridgely · 8.5 mi

About ZIP 21640

ZIP code 21640 is assigned to Henderson, Maryland. It crosses 2 counties; most of its land is in Caroline County. Its Census area covers about 25.66 square miles of land. The closest neighboring ZIP is 21636 (Goldsboro), about 3.9 miles away.

Every address in 21640 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