ZIP Code 20859
Potomac, Maryland · Montgomery County
No8822
Zip20859
TypePO BOX
Decommissioned0
Primary CityPotomac
Acceptable CitiesRockville
Unacceptable Cities—
StateMD
LstateMaryland
CountyMontgomery County
TimezoneAmerica/New_York
Area Codes240
World RegionNA
CountryUS
Latitude39,02
Longitude-77,19