ZIP code 21139
Where is ZIP code 21139?
Riderwood, Maryland
Baltimore County · PO Box only ZIP code
ZIP code 21139 belongs to Riderwood, Maryland in Baltimore County. 21139 is a PO Box only ZIP code: it is used for post office boxes at the Riderwood post office, not for street addresses. It is in the Eastern Time zone and uses area code 410. The closest ZIP codes are 21022 (Brooklandville, 1.5 mi southwest), 21093 (Lutherville Timonium, 1.7 mi north) and 21204 (Towson, 2.4 mi east).
| ZIP code | 21139 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Riderwood |
| State | Maryland (MD) |
| County | Baltimore County |
| Time zone | Eastern Time · now |
| Area code | 410 |
| Coordinates | 39.4093, -76.6486 map |
| 3-digit prefix | 211 |
The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.
ZIP codes near 21139
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 21022 | Brooklandville, MD | 1.5 mi SW | PO Box only |
| 21093 | Lutherville Timonium, MD | 1.7 mi N | Standard |
| 21204 | Towson, MD | 2.4 mi E | Standard |
| 21252 | Towson, MD | 2.6 mi E | Unique |
| 21284 | Towson, MD | 2.6 mi E | PO Box only |
| 21285 | Towson, MD | 2.6 mi E | PO Box only |
| 21209 | Baltimore, MD | 2.9 mi SW | Standard |
| 21153 | Stevenson, MD | 3.4 mi W | PO Box only |
| 21094 | Lutherville Timonium, MD | 3.6 mi NE | PO Box only |
| 21212 | Baltimore, MD | 3.8 mi SE | Standard |
| 21286 | Towson, MD | 3.9 mi E | Standard |
| 21210 | Baltimore, MD | 4.1 mi S | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 21139 or measure the distance to another ZIP code.
How to address mail to 21139
PO BOX 123
RIDERWOOD MD 21139
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (21139-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 21139?
- 21139 is a Riderwood, Maryland ZIP code.
- What county is 21139 in?
- ZIP code 21139 is in Baltimore County, Maryland.
- What time zone is ZIP code 21139 in?
- 21139 is in the Eastern Time zone (America/New_York).
- What area code is 21139?
- Phone numbers in ZIP code 21139 use area code 410.
- Can I use 21139 for a street address?
- No. 21139 is only for PO Boxes. Street addresses in Riderwood use another ZIP code.
- What ZIP codes are near 21139?
- The nearest ZIP codes to 21139 are 21022 (Brooklandville, 1.5 miles), 21093 (Lutherville Timonium, 1.7 miles), 21204 (Towson, 2.4 miles) and 21252 (Towson, 2.6 miles).