ZIP Code 21641
Hillsboro, Maryland · Caroline County
No9094
Zip21641
TypePO BOX
Decommissioned0
Primary CityHillsboro
Acceptable Cities—
Unacceptable Cities—
StateMD
LstateMaryland
CountyCaroline County
TimezoneAmerica/New_York
Area Codes410, 443, 667
World RegionNA
CountryUS
Latitude38,92
Longitude-75,94