Find the last 4 digits (ZIP+4) for an address in 20678

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ZIP Code 20678 – Prince Frederick, MD

Prince Frederick, Maryland · Calvert County · Eastern time

ZIP code20678
CityPrince Frederick
StateMaryland
CountyCalvert County
Population12,752
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area44.87 sq mi
Center (lat, long)38.5251, -76.5954

Area codes in this area

227240301

These are the area codes that most often serve ZIP 20678 (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

20610 Barstow · 1.1 mi20676 Port Republic · 3.8 mi20612 Benedict · 4.7 mi20639 Huntingtown · 5.3 mi20608 Aquasco · 6.9 mi20685 Saint Leonard · 7.2 mi20615 Broomes Island · 8.2 mi20637 Hughesville · 8.7 mi

About ZIP 20678

ZIP code 20678 is assigned to Prince Frederick, Maryland. It lies in Calvert County. Its Census area covers about 44.87 square miles of land. The closest neighboring ZIP is 20610 (Barstow), about 1.1 miles away.

Every address in 20678 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