ZIP Code 21104
Marriottsville, Maryland · Howard County
No8929
Zip21104
TypeSTANDARD
Decommissioned0
Primary CityMarriottsville
Acceptable CitiesHenryton, Marriottsvl, Woodstock
Unacceptable Cities—
StateMD
LstateMaryland
CountyHoward County
TimezoneAmerica/New_York
Area Codes410, 443, 667
World RegionNA
CountryUS
Latitude39,35
Longitude-76,89