Find the last 4 digits (ZIP+4) for an address in 21057

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ZIP Code 21057 – Glen Arm, MD

Glen Arm, Maryland · Baltimore County · Eastern time

ZIP code21057
CityGlen Arm
StateMaryland
CountyBaltimore County
Population4,386
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area15.89 sq mi
Center (lat, long)39.4487, -76.5125

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21057 (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

21092 Long Green · 1.8 mi21082 Hydes · 2.9 mi21051 Fork · 3.4 mi21234 Parkville · 4 mi21286 Towson · 4.1 mi21094 Lutherville Timonium · 4.3 mi21236 Nottingham · 4.4 mi21013 Baldwin · 4.5 mi

About ZIP 21057

ZIP code 21057 is assigned to Glen Arm, Maryland. It lies in Baltimore County. Its Census area covers about 15.89 square miles of land. The closest neighboring ZIP is 21092 (Long Green), about 1.8 miles away.

Every address in 21057 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