ZIP Code 21790 is located in the county of Frederick in the state of Maryland. 21790 ZIP Code is spread between the coordinates of +39.2613824 Latitude and -77.48791420 Longitude. 21790 ZIP Code is part of the 240 area code. There are 0 postal offices in zip code 21790.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21790. 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.