ZIP Code 20689 is located in the county of Calvert in the state of Maryland. 20689 ZIP Code is spread between the coordinates of +38.6636758 Latitude and -76.58481994 Longitude. 20689 ZIP Code is part of the 410 area code. There is 1 postal office in zip code 20689.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20689. 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.