The Nashawannuck Mills Historic District of Easthampton, Massachusetts encompasses a 19th-century industrial complex on Cottage Street in the heart of the town. Most of the connected series of brick buildings were built between about 1848 and 1870, although the facilities were used for industrial purposes until 1970. The oldest building erected was by Samuel Williston for a button factory. Powered by a dam that impounded Bound Brook, the facility expanded in both size and function, eventually becoming a major producer of elastic fabrics for goods such as suspenders and webbing. The industrial works were the major economic engine in Easthampton into the 20th century.