The historical society for the town of Williamson, NY was originally founded in 1964 and chartered by the NYS Board of Regents in 1971 under the name Pultneyville Historical Society. In May 2010, the name of the Society was changed to Williamson-Pultneyville Historical Society.

The mission of the Society has been and continues to be preserving the history of the Town of Williamson. Williamson is comprised of three hamlets: East Williamson, Pultneyville and Williamson. The Society is located in the hamlet of Pultneyville on the Seaway Trail on the south shore of Lake Ontario at 4130 Mill Street in a landmark home c. 1858 purchased in 1996. The home was known as the Auchampaugh residence.

The home provides meeting and office space for the Society and houses the society's extensive archival and artifacts collection. Space within the facility is designated for permanent and traveling exhibits and a gift shop. A room is dediacated to the permanent collection of artifacts of Captain Throop. Another room houses articfacts recovered from the shipwreck of the St. Peter which are on loan from the State of New York. The shipwreck is on the National Register of Historic Places and located in Lake Ontario just north of Pultneyville.

As a result of merging with The Landmark Society in 2000, the Society also holds the deeds of nearby Centennial Park in the heart of Pultneyville and Gates Hall, a New York State and National Landmark listed on both the New York State Register and the National Register of Historic Places. Gates Hall is a cultural highlight of the area and bears distinction as the second oldest active little theatre in the United States. The Society has an ongoing relatioship with Gatesingers, the resident theatrical group that uses Gates Hall for their plays. Gates Hall is also available to the public for private functions.

The Society is open to the public on weekends throughout the summer months Fri-Sun afternoons and by special appointment.