Havre De Grace Middle School 401 Lewis Ln Havre De Grace, MD 21078 Phone : (410) 939-6608 Business Category Schools Schools-Junior High Schools-Public Harford County--pupil Services, Schools, Havre De Grace Middle Havre De Grace, MD 21078 Phone : (410) 939-6608 Business Category Schools Government Offices-County Government Offices & Public Schools Harford County--schools, Schools, Havre De Grace Middle Havre De Grace, MD 21078 Phone : (410) 939-6608 Business Category Schools Government Offices-County Government Offices & Public Schools