The Oneida Community Mansion House is a historic house and museum that was once the home of the Oneida Community, a religiously-based socialist Utopian group led by John Humphrey Noyes. Noyes and his followers moved to the site in Oneida from Putney, Vermont in 1848. The Community lived in the Mansion House communally until 1880, when they dissolved into a joint-stock company.

The Oneida Community was a perfectionist religious communal society founded by John Humphrey Noyes and his followers in 1848 near Oneida, New York. The community believed that Jesus had already returned in AD 70, making it possible for them to bring about Jesus's millennial kingdom themselves, and be perfect and free of sin in this world, not just in Heaven. The Oneida Community practiced communalism, group marriage, male sexual continence, Oneida stirpiculture, and mutual criticism.