Zip Code 21770 is located in Monrovia, Frederick county in the state of Maryland. 21770 Zip Code is spread between the coordinates of +39.351552 Latitude and -077.265818 Longitude. 21770 Zip Code is part of the 301 area code. There is 1 postal office in zip code 21770 which we have listed below
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21770. 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.