ZIP Code 21139
Riderwood · Baltimore, Maryland
21139 is the ZIP code of Riderwood in Baltimore, Maryland, United States.
- ZIP Code
- 21139
- County
- Baltimore
- State
- Maryland
- Country
- United States
Place with ZIP code 21139
| Place | County | Location |
|---|---|---|
| Riderwood | Baltimore | 39.409, -76.649 |
Near Baltimore
The nearest major city is Baltimore, about 14 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 21139?
Riderwood.
Which county and state is 21139 in?
Baltimore, Maryland, United States.
What is the nearest major city to 21139?
Baltimore, about 14 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.