The MacDuffie School is a private, nonsectarian, coeducational college preparatory school for day and boarding students in grades 6–12. The school is located on over 250 acres in Granby, Massachusetts, United States, within close distance to the University of Massachusetts, and Amherst, Hampshire and Mount Holyoke colleges.

Granby is a town in Hampshire County, Massachusetts, United States. The population was 6,110 at the 2020 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. The census-designated place of Granby corresponds to the main village of Granby in the center of the town.