The school initially occupied a rented building on Hays Street in Bel Air before moving to its current location on Moores Mill Road in 1962.

Harford Day School enrolls boys and girls from 3 year olds through eighth grade on a 12-acre (49,000 m2) campus in Bel Air, MD.

The division heads are currently: The school teaches Science, Mathematics, History, English grammar and literature, along with two foreign languages.

The musical became a yearly event in 2000 after a generous contribution to the program by the family of Lyn Stacie Getz '81.

An award for outstanding achievement in the performing arts is given in Lyn Stacie Getz's name to an eighth grader at the end of each school year.