The Thayer School is located on the campus of Dartmouth College, which is situated in the rural, Upper Valley New England town of Hanover, New Hampshire. The campus of the Thayer School sits in a complex on the west side Dartmouth's campus near the Connecticut River. When classes first began in 1871, Sylvanus Thayer's endowment had not provided for a physical plant. Consequently, the school was an itinerant institution for many years, occupying parts of various College buildings and, at one point, a former structure of the New Hampshire College of Agriculture and the Mechanic Arts.