The Pioneer Valley School District was formed in 1991 following an agreement by the four towns involved: Leyden, Northfield, Warwick, and Bernardston. All four elementary schools fed into Pioneer until the closure of Leyden and Warwick elementary schools.
A second expansion was made in 1992, expanding the high school portion and overhauling the auditorium.
Governance
Since the formation of the Pioneer Valley Regional School District, Pioneer Valley Regional School has fallen under the jurisdiction of the district's twelve-member school committee, made up of three members from each of the four towns. Though students from Vernon, Vermont are allowed to attend Pioneer, Vernon has no seat at the committee.