ZIP Code 20603 is located in the county of Charles in the state of Maryland. 20603 ZIP Code is spread between the coordinates of +38.6263798 Latitude and -76.96145116 Longitude. 20603 ZIP Code is part of the 240, 301 area code. There is 1 postal office in zip code 20603.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20603. 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.