ZIP Code 21797 is located in the county of Howard in the state of Maryland. 21797 ZIP Code is spread between the coordinates of +39.3403079 Latitude and -77.06457867 Longitude. 21797 ZIP Code is part of the area code. There is 1 postal office in zip code 21797.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21797. 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.