ZIP code 20857
Where is ZIP code 20857?
Rockville, Maryland
Montgomery County · Unique ZIP code
ZIP code 20857 belongs to Rockville, Maryland in Montgomery County. 20857 is a unique ZIP code assigned to a single organization (Hhs) that gets a lot of mail. It is in the Eastern Time zone and uses area code 240. The closest ZIP codes are 20847 (Rockville, 0 mi north), 20849 (Rockville, 0 mi north) and 20883 (Gaithersburg, 0.4 mi northwest).
| ZIP code | 20857 |
|---|---|
| Type | Unique ZIP code for a single organization |
| Status | Active |
| City | Rockville |
| State | Maryland (MD) |
| County | Montgomery County |
| Time zone | Eastern Time · now |
| Area code | 240 |
| Coordinates | 39.084, -77.1528 map |
| 3-digit prefix | 208 |
The Census Bureau doesn’t publish population figures for unique 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 20857
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 20847 | Rockville, MD | 0 mi N | PO Box only |
| 20849 | Rockville, MD | 0 mi N | PO Box only |
| 20883 | Gaithersburg, MD | 0.4 mi NW | PO Box only |
| 20850 | Rockville, MD | 0.8 mi W | Standard |
| 20851 | Rockville, MD | 1.7 mi E | Standard |
| 20852 | Rockville, MD | 2.9 mi SE | Standard |
| 20853 | Rockville, MD | 3.1 mi E | Standard |
| 20855 | Derwood, MD | 3.5 mi N | Standard |
| 20854 | Potomac, MD | 3.8 mi SW | Standard |
| 20880 | Washington Grove, MD | 3.9 mi N | PO Box only |
| 20877 | Gaithersburg, MD | 4.4 mi NW | Standard |
| 20896 | Garrett Park, MD | 4.6 mi SE | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 20857 or measure the distance to another ZIP code.
How to address mail to 20857
123 MAIN ST
ROCKVILLE MD 20857
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (20857-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Rockville, MD
All Rockville ZIP codes with population and income →
Questions
- What city is ZIP code 20857?
- 20857 is a Rockville, Maryland ZIP code.
- What county is 20857 in?
- ZIP code 20857 is in Montgomery County, Maryland.
- What time zone is ZIP code 20857 in?
- 20857 is in the Eastern Time zone (America/New_York).
- What area code is 20857?
- Phone numbers in ZIP code 20857 use area code 240.
- Can I use 20857 for a street address?
- Only for mail to the organization it is assigned to. Other addresses in Rockville use a standard ZIP code.
- What ZIP codes are near 20857?
- The nearest ZIP codes to 20857 are 20847 (Rockville, 0 miles), 20849 (Rockville, 0 miles), 20883 (Gaithersburg, 0.4 miles) and 20850 (Rockville, 0.8 miles).