Find the last 4 digits (ZIP+4) for an address in 21555

ZIP 21555, Oldtown, MD is filled in. Just type the street address.

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ZIP Code 21555 – Oldtown, MD

Oldtown, Maryland · Allegany County · Eastern time

ZIP code21555
CityOldtown
StateMaryland
CountyAllegany County
Population1,470
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area98.29 sq mi
Center (lat, long)39.5751, -78.5626

Area codes in this area

227240301

These are the area codes that most often serve ZIP 21555 (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

25431 Levels · 6.3 mi26722 Green Spring · 6.5 mi21504 Cumberland · 6.8 mi21530 Flintstone · 7.3 mi21560 Spring Gap · 7.7 mi26763 Springfield · 10.1 mi25444 Slanesville · 10.3 mi25437 Points · 10.5 mi

About ZIP 21555

ZIP code 21555 is assigned to Oldtown, Maryland. It lies in Allegany County. Its Census area covers about 98.29 square miles of land. The closest neighboring ZIP is 25431 (Levels), about 6.3 miles away.

Every address in 21555 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