CITY & SETTLEMENT
Riderwood Area Codes and ZIP Codes
Maryland · United States
- Country calling code
- +1
- ZIP Codes
- 21139
- Local time
- America/New York
- Country
- United States
A local area-code link is not listed here. The country calling code is shown separately when available.
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Riderwood ZIP Codes
Maryland · Baltimore County · US
Maryland · Baltimore · US
Map of Riderwood
Local time & call planner
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Riderwood Time Zone
- IANA time zone
- America/New_York
- Current UTC offset
- -05:00
- Daylight saving time
- Not in effect
Map & location
Latitude and Longitude
- Latitude
- 39.40927
- Longitude
- -76.64858
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International dialing format
+1 [national number]
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Local facts
- Recorded elevation
- 78 m
Names & history
Names, translations and spelling variants
English
- Riderwoodpreferred
Other spellings
- Rider
- Sherwood