ZIP Code 20818 is located in the county of Montgomery in the state of Maryland. 20818 ZIP Code is spread between the coordinates of +38.9762750 Latitude and -77.16148136 Longitude. 20818 ZIP Code is part of the 301, 24 area code. There is 1 postal office in zip code 20818.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20818. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.