ZIP Code 20678 is located in the county of Calvert in the state of Maryland. 20678 ZIP Code is spread between the coordinates of +38.5331799 Latitude and -76.58841770 Longitude. 20678 ZIP Code is part of the 410, 443 area code. There are 2 postal offices in zip code 20678.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20678. 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.