ZIP Code 21740 is located in the county of Washington in the state of Maryland. 21740 ZIP Code is spread between the coordinates of +39.6301312 Latitude and -77.73430801 Longitude. 21740 ZIP Code is part of the 240, 301 area code. There are 2 postal offices in zip code 21740.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21740. 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.