Harrisville is a town in Cheshire County, New Hampshire, United States. Besides the town center, it also includes the villages of Chesham and Eastview. The population of the town was 984 at the 2020 census. Harrisville is a unique, preserved 19th-century mill town located in the Monadnock region of southern New Hampshire. There are nine bodies of water in the town, many back roads and trails to explore, and two original train depots at Harrisville and Chesham.