ZIP Code 20620
Callaway · St. Mary's, Maryland
20620 is the ZIP code of Callaway in St. Mary's, Maryland, United States.
- ZIP Code
- 20620
- County
- St. Mary's
- State
- Maryland
- Country
- United States
Place with ZIP code 20620
| Place | County | Location |
|---|---|---|
| Callaway | St. Mary's | 38.227, -76.521 |
Near Washington
The nearest major city is Washington, about 87 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 20620?
Callaway.
Which county and state is 20620 in?
St. Mary's, Maryland, United States.
What is the nearest major city to 20620?
Washington, about 87 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.