ZIP Code 20634
Great Mills · St. Mary's, Maryland
20634 is the ZIP code of Great Mills in St. Mary's, Maryland, United States.
- ZIP Code
- 20634
- County
- St. Mary's
- State
- Maryland
- Country
- United States
Place with ZIP code 20634
| Place | County | Location |
|---|---|---|
| Great Mills | St. Mary's | 38.267, -76.495 |
Near Washington
The nearest major city is Washington, about 84 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 20634?
Great Mills.
Which county and state is 20634 in?
St. Mary's, Maryland, United States.
What is the nearest major city to 20634?
Washington, about 84 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.