ZIP Code 20899
Gaithersburg · Montgomery, Maryland
20899 is the ZIP code of Gaithersburg in Montgomery, Maryland, United States.
- ZIP Code
- 20899
- County
- Montgomery
- State
- Maryland
- Country
- United States
Place with ZIP code 20899
| Place | County | Location |
|---|---|---|
| Gaithersburg | Montgomery | 39.140, -77.222 |
Near Washington
The nearest major city is Washington, about 32 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 20899?
Gaithersburg.
Which county and state is 20899 in?
Montgomery, Maryland, United States.
What is the nearest major city to 20899?
Washington, about 32 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.