ZIP Code 20678
Prince Frederick · Calvert, Maryland
20678 is the ZIP code of Prince Frederick in Calvert, Maryland, United States.
- ZIP Code
- 20678
- County
- Calvert
- State
- Maryland
- Country
- United States
Place with ZIP code 20678
| Place | County | Location |
|---|---|---|
| Prince Frederick | Calvert | 38.534, -76.596 |
Near Washington
The nearest major city is Washington, about 55 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 20678?
Prince Frederick.
Which county and state is 20678 in?
Calvert, Maryland, United States.
What is the nearest major city to 20678?
Washington, about 55 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.