The Wilder-Holton House is a historic house museum at 226 Main Street in Lancaster, New Hampshire. Built in 1780, this two story timber frame house is believed to be the first two story house built in the area, and to be the oldest surviving house in Coos County. The house is a vernacular farmhouse, built by its first owner, Jonas Wilder, with framing that is more typical of barn construction. The upstairs of the house is a large open space, which was used in the 1790s for religious services before a church was built. In the early 19th century it probably also served as a boarding house.