Find the last 4 digits (ZIP+4) for an address in 21155

ZIP 21155, Upperco, MD is filled in. Just type the street address.

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ZIP Code 21155 – Upperco, MD

Upperco, Maryland · Baltimore County · Eastern time

ZIP code21155
CityUpperco
StateMaryland
CountyBaltimore CountyCarroll County
Population3,313
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area22.12 sq mi
Center (lat, long)39.5736, -76.8061

Area codes in this area

410443667

These are the area codes that most often serve ZIP 21155 (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

21020 Boring · 3.6 mi21074 Hampstead · 3.8 mi21023 Butler · 4.9 mi21071 Glyndon · 6.2 mi21152 Sparks Glencoe · 6.5 mi21030 Cockeysville · 7 mi21048 Finksburg · 8.1 mi21102 Manchester · 8.5 mi

About ZIP 21155

ZIP code 21155 is assigned to Upperco, Maryland. It crosses 2 counties; most of its land is in Baltimore County. Its Census area covers about 22.12 square miles of land. The closest neighboring ZIP is 21020 (Boring), about 3.6 miles away.

Every address in 21155 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