ZIP Code 21770
Monrovia, Maryland · Frederick County
No9182
Zip21770
TypeSTANDARD
Decommissioned0
Primary CityMonrovia
Acceptable Cities—
Unacceptable Cities—
StateMD
LstateMaryland
CountyFrederick County
TimezoneAmerica/New_York
Area Codes227, 240, 301
World RegionNA
CountryUS
Latitude39,35
Longitude-77,25