Hoosac School was founded as an Episcopal church school in 1889 by Dr. Edward Dudley Tibbits, on land owned by his family. There were 19 students enrolled at Hoosac that year, with VI Formers graduating in the Class of 1890.

For over 130 years, Hoosac has maintained and upheld Dr. Tibbits core beliefs about a well-rounded boarding school experience - to educate the whole student, academically, athletically, socially as well as spiritually. It is Hoosac's mission to develop enthusiastic learners with creative minds and strong moral compasses who are ready to handle college and life with intelligence and grace. Hoosac is committed to sustaining the small scale preparatory school model in which each student receives an individualized education with attention, care and guidance and is offered the opportunity to grow socially within the Hoosac School community.

Students benefit from a rigorous academic program, experiential off-campus programs, fine and performing arts, championship athletics, and a wide selection of extracurricular activities.