Find the last 4 digits (ZIP+4) for an address in 21042

ZIP 21042, Ellicott City, MD is filled in. Just type the street address.

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ZIP Code 21042 – Ellicott City, MD

Ellicott City, Maryland · Howard County · Eastern time

ZIP code21042
CityEllicott City
StateMaryland
CountyHoward County
Population43,327
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area37 sq mi
Center (lat, long)39.2772, -76.8946

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21042 (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

21041 Ellicott City · 3.8 mi21150 Simpsonville · 3.8 mi21794 West Friendship · 4.1 mi21163 Woodstock · 4.8 mi21104 Marriottsville · 4.9 mi21044 Columbia · 5 mi21043 Ellicott City · 5.2 mi21029 Clarksville · 5.6 mi

About ZIP 21042

ZIP code 21042 is assigned to Ellicott City, Maryland. It lies in Howard County. Its Census area covers about 37 square miles of land. The closest neighboring ZIP is 21041 (Ellicott City), about 3.8 miles away.

Every address in 21042 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