ZIP Code 20866 is located in the county of Montgomery in the state of Maryland. 20866 ZIP Code is spread between the coordinates of +39.0975829 Latitude and -76.93216427 Longitude. 20866 ZIP Code is part of the 301 area code. There are 2 postal offices in zip code 20866.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20866. 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.