With increasing population growth in this area of once-rural Harford County during the 1970s, the Board of Education determined the need for a secondary school to serve the youth of Fallston.

Fallston High School was designed by architect Richard Ayres and built by Cam Construction Company at a cost of $10 million.

The land was acquired from local Real Estate developer Mr. Joseph Deigert, with an adjacent four acres set aside as a new home for the Fallston Volunteer Fire Company.

The majority of the original Fallston students transferred from Bel Air schools.

Maryland Public Secondary Schools Athletic Association (MPSSAA) Sanctioned Sports Participate in the Upper Chesapeake Bay Athletic Conference Fall: Field Hockey, Football, Men's and Women's Soccer, Cross Country, Cheerleading, Men's and Women's Volleyball, Golf Winter: Men's and Women's Basketball, Wrestling, Cheerleading, Indoor Track, Men's and Women's Swimming Spring: Baseball, Softball, Men's and Women's Lacrosse, Track & Field, Tennis Non-Sanctioned Sports: Ice Hockey, Bowling Maryland State Championship Teams