Francis Stuart Chapin (3 February 1888 – 7 July 1974) was an American sociologist and educator; he was a professor of sociology at the University of Minnesota from 1922 to 1953.
He received his bachelor's degree from Columbia University in 1909, as well as his PhD from the same school in 1911.
He then moved to Smith College where he taught sociology and served as department chair (1912–1921).
He was a prime mover in the creation of the Social Science Research Council.
His grandson, F. Stuart Chapin III, is a professor of ecology at the University of Alaska.