ZIP Code 20688 is located in the county of Calvert in the state of Maryland. 20688 ZIP Code is spread between the coordinates of +38.3411258 Latitude and -76.46335624 Longitude. 20688 ZIP Code is part of the 410, 443, 667 area code. There is 1 postal office in zip code 20688.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20688. 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.