ZIP Code 20659
Mechanicsville · St. Mary's, Maryland
20659 is the ZIP code of Mechanicsville in St. Mary's, Maryland, United States.
- ZIP Code
- 20659
- County
- St. Mary's
- State
- Maryland
- Country
- United States
Place with ZIP code 20659
| Place | County | Location |
|---|---|---|
| Mechanicsville | St. Mary's | 38.429, -76.725 |
Near Washington
The nearest major city is Washington, about 58 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 20659?
Mechanicsville.
Which county and state is 20659 in?
St. Mary's, Maryland, United States.
What is the nearest major city to 20659?
Washington, about 58 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.