By 1913, the schools were operated under the single moniker "The Northfield Schools," but remained separate institutions until 1972, when the two schools merged to become Northfield Mount Hermon, continuing to operate with two coeducational campuses. In 2005, the school consolidated its students and classes onto the Mount Hermon campus. This decision by the board of trustees stemmed from a belief that students would receive the best possible education in a smaller, more close-knit community, and from a desire to focus the school's resources on educational programs and maintain one campus instead of two.