Magnolia Elementary School 901 Trimble Rd Joppa, MD 21085 Phone : (410) 612-1553 Business Category Schools Schools-Elementary Schools-Public Harford County--schools, Magnolia Elementary Edgewood, MD 21040 Phone : (410) 612-1553 Business Category Schools Government Offices-County Government Offices & Public Schools Harford County--pupil Services, Schools, Magnolia Elementary Edgewood, MD 21040 Phone : (410) 612-1553 Business Category Schools Government Offices-County Government Offices & Public Schools