City · Maryland · United States
Prince Frederick, MD — ZIP codes
1 ZIP code · Calvert County
- City
- Prince Frederick
- County
- Calvert
- State
- Maryland
- Country
- United States
- Postal code
- 20678Single source
- Coordinates
- 38.5336, -76.5955 View on OpenStreetMap
- Area codes
- 443, 410, 667
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 20678 | Prince Frederick | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.