Harford Day School is an independent educational institution in Bel Air, Harford County, Maryland which is known for its dedicated faculty, strong philosophies, impressive academic record, and superior athletic program. Harford Day School is accredited by AIMS and a member of NAIS. The school was founded in 1957 by three women: Sara Brumfield, Sidney Tynan, and Mignon Cameron, the wife of a local judge.