Zip code 21139: Riderwood, Maryland
This zip has no delivery boundary. The map shows its post office location and nearby zip codes.
About 21139
21139 is a non-residential zip code for Riderwood, Maryland (Baltimore County). It has no delivery area of its own, so the Census Bureau doesn't publish population or housing figures for it. Codes like this are usually assigned to post office boxes, or to a single organization such as a university, hospital, government agency or large company that gets enough mail to need its own zip code.
For a picture of the people who live around 21139, see the residential zip codes in the nearby list below.
Geography
- City (USPS)
- Riderwood
- State
- Maryland
- County
- Baltimore County
- Center point
- 39.4093° N, 76.6486° W
- Time zone
- Eastern Time (UTC-5, UTC-4 in summer)
- Zip type
- PO box or unique zip
Zip codes near 21139
| Zip | City | Distance | IncomeMedian income |
|---|---|---|---|
| 21204 | Towson, MD | 1.2 mi | $99,606 |
| 21022 | Brooklandville, MD · PO box | 1.5 mi | — |
| 21093 | Lutherville Timonium, MD | 2 mi | $125,528 |
| 21252 | Towson, MD | 2.2 mi | — |
| 21285 | Towson, MD | 2.3 mi | — |
| 21209 | Baltimore, MD | 2.5 mi | $91,437 |
| 21284 | Towson, MD · PO box | 2.6 mi | — |
| 21153 | Stevenson, MD | 2.8 mi | $220,179 |
| 21212 | Baltimore, MD | 3.4 mi | $96,685 |
| 21094 | Lutherville Timonium, MD · PO box | 3.6 mi | — |
| 21210 | Baltimore, MD | 3.6 mi | $112,428 |
| 21286 | Towson, MD | 4 mi | $93,808 |
Questions about 21139
What city is zip code 21139?
21139 is assigned to Riderwood, Maryland. The city name is the one the Postal Service prefers for mail addressed to this zip code.
What county is 21139 in?
21139 is in Baltimore County, Maryland.
What time zone is 21139 in?
21139 is in Eastern Time.
What zip codes are near 21139?
The closest zip codes to 21139 are 21204, 21022, 21093, 21252, 21285.
Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 21139, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.