ZIP Code 20813 is located in the county of Montgomery in the state of Maryland. 20813 ZIP Code is spread between the coordinates of +38.98 Latitude and -77.12 Longitude. 20813 ZIP Code is part of the 240 area code. There are 0 postal offices in zip code 20813.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20813. 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.