Zip Code 20830 is located in Olney, Montgomery county in the state of Maryland. 20830 Zip Code is spread between the coordinates of +39.155220 Latitude and -077.066745 Longitude. 20830 Zip Code is part of the 301 area code. There are 0 postal offices in zip code 20830 which we have listed below
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20830. 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.