Acton-Boxborough Regional High School (****ABRHS or simply AB) is an open-enrollment high school in Acton, Massachusetts, United States. A part of the Acton-Boxborough Regional School District, it serves the Massachusetts towns of Acton and Boxborough and has students in grades 9 through 12. It is situated downhill from the Raymond J. Grey Junior High School, at 36 Charter Road in Acton. Raymond J. Grey Junior High School occupies the facility that, until 1973, was the high school. In 1999 multiple fires were set at ABRHS. The first fire began near the gymnasium but was quickly extinguished. The second fire, a five-alarm blaze in the school auditorium, seriously damaged the auditorium and forced the evacuation of all 1,300 students and canceled school the following day. No students or staff were injured, but one firefighter was hospitalized after suffering from smoke inhalation. ABRHS underwent a $40 million renovation and expansion in 2005.

Mascot

In June of 2020, a change.org petition was started to change the AB "Colonials" mascot to "challenge the normalization of colonialism in our daily lives." A few months later, after a challenging debate, "the Acton-Boxborough Regional School Committee unanimously voted to retire the Colonial as the school mascot." After nearly two years, a new mascot was chosen from a narrowed down list of submissions resulting in the new mascot, the Acton Boxborough Revolution.

Notable alumni