20857 ZIP Code — Rockville, MD
Montgomery County, Maryland
ZIP code 20857 is located in Rockville, Maryland, within Montgomery County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 301/240.
0
population
0.00
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
20857 ZIP code map
Cities in ZIP code 20857
Below are the cities the US Postal Service accepts for ZIP code 20857. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Rockville | Acceptable |
| Rockville | Preferred |
Nearby ZIP codes
20851 Rockville (1.6 mi)
20850 Rockville (2 mi)
20852 Rockville (2.7 mi)
20853 Rockville (3.3 mi)
20855 Derwood (4 mi)
20877 Gaithersburg (4.1 mi)
20899 Gaithersburg (4.9 mi)
20906 Silver Spring (5.1 mi)
20897 Suburb Maryland Fac (5.1 mi)
20878 Gaithersburg (5.3 mi)
20895 Kensington (5.5 mi)
20817 Bethesda (5.6 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 24 |
| County FIPS | 031 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 39.0839 |
| Longitude | -77.1534 |
| Timezone | Eastern (ET) |
| Area code | 301/240 |