ZIP Code 21821 – Deal Island, MD
Deal Island, Maryland · Somerset County · Eastern time
| ZIP code | 21821 |
|---|---|
| City | Deal Island |
| State | Maryland |
| County | Somerset County |
| Population | 797 |
| Time zone | Eastern · local time |
| ZIP type | Standard (has a Census ZCTA area) |
| Land area | 14.74 sq mi |
| Center (lat, long) | 38.1646, -75.9167 |
Area codes in this area
These are the area codes that most often serve ZIP 21821 (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
About ZIP 21821
ZIP code 21821 is assigned to Deal Island, Maryland. It lies in Somerset County. Its Census area covers about 14.74 square miles of land. The closest neighboring ZIP is 21840 (Nanticoke), about 5.9 miles away.
Every address in 21821 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