A township of Hampshire county, Massachusetts, U.S.A., on the Connecticut river, about 12 m. N. of Springfield. Pop. (1900), 4526, of whom 1119 were foreignborn; (1910 census), 4894. Area, 18.5 sq. m. There are no steam railways, but an electric line connects South Hadley and South Hadley Falls with the New York, New Haven & Hartford and the Boston & Maine railways at Holyoke. The village of South Hadley, or the Center, lies at the south base of Mount Holyoke, about 4 m. from Holyoke and about 3 m. from South Hadley Falls; it is the seat of Mount Holyoke College. South Hadley Falls are connected with Holyoke by a bridge across the Connecticut river. The falls of the river afford water-power for paper mills, cotton and woollen mills, and saw mills. South Hadley was originally a part of the township of Hadley, but in 1 753 the district of South Hadley was established, and in 1775 incorporated as a separate township.