Find the last 4 digits (ZIP+4) for an address in 21738

ZIP 21738, Glenwood, MD is filled in. Just type the street address.

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ZIP Code 21738 – Glenwood, MD

Glenwood, Maryland · Howard County · Eastern time

ZIP code21738
CityGlenwood
StateMaryland
CountyHoward County
Population3,696
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area6.98 sq mi
Center (lat, long)39.2798, -77.0267

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21738 (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

21737 Glenelg · 2.2 mi21036 Dayton · 3.3 mi21794 West Friendship · 3.5 mi21723 Cooksville · 3.6 mi21797 Woodbine · 4.2 mi21765 Lisbon · 4.7 mi20833 Brookeville · 5.1 mi21041 Ellicott City · 5.4 mi

About ZIP 21738

ZIP code 21738 is assigned to Glenwood, Maryland. It lies in Howard County. Its Census area covers about 6.98 square miles of land. The closest neighboring ZIP is 21737 (Glenelg), about 2.2 miles away.

Every address in 21738 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