21139 postal code
United StatesUpdated 2026-11-09Riderwood, MarylandBaltimore5 digits
Postal code details
1 placeCode
21139
Place
Riderwood
Region
Maryland
County
Baltimore
Coordinates
39.4093, -76.6486
Accuracy
4 / 6
Country
United States
Location
OpenStreetMap ↗
39.4093, -76.6486© OpenStreetMap
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Places under this code
1| Place | Region | County | Coordinates |
|---|---|---|---|
| Riderwood | Maryland | Baltimore | 39.4093, -76.6486 |
Same code in other countries
4| Country | Place | Region |
|---|---|---|
| ID Indonesia | Bah Kapul | North Sumatra |
| MX Mexico | Centinela | Baja California |
| PE Peru | Estacion de Pucara | Puno |
| SE Sweden | Malmö | Skåne |
FAQ
Which city is 21139 in?
Riderwood, Maryland, United States.
What are the coordinates of 21139?
39.4093, -76.6486
Is 21139 used in other countries?
Yes, 4 other countries.
Updated 2026-11-09. Attribution in Data & license.