Find the last 4 digits (ZIP+4) for an address in 21757

ZIP 21757, Keymar, MD is filled in. Just type the street address.

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ZIP Code 21757 – Keymar, MD

Keymar, Maryland · Carroll County · Eastern time

ZIP code21757
CityKeymar
StateMaryland
CountyCarroll CountyFrederick County
Population2,671
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area35.17 sq mi
Center (lat, long)39.5939, -77.2581

Area codes in this area

227240301

These are the area codes that most often serve ZIP 21757 (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

21759 Ladiesburg · 2.4 mi21775 New Midway · 2.8 mi21778 Rocky Ridge · 4 mi21798 Woodsboro · 4.3 mi21791 Union Bridge · 5.6 mi21787 Taneytown · 7.4 mi21727 Emmitsburg · 7.6 mi21762 Libertytown · 7.8 mi

About ZIP 21757

ZIP code 21757 is assigned to Keymar, Maryland. It crosses 2 counties; most of its land is in Carroll County. Its Census area covers about 35.17 square miles of land. The closest neighboring ZIP is 21759 (Ladiesburg), about 2.4 miles away.

Every address in 21757 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