The Bellport-Brookhaven Historical Society is a not-for-profit local organization devoted to the preservation and interpretation of Long Island’s past; in particular it is concerned with the history of the Bellport, Brookhaven, East Patchogue area. The Society pursues this goal through its museum, its historic house with its ancillary structures, its museum collections and gallery exhibitions, its educational programs, its outreach to the community, and its publication of studies on local history and material culture. Seeking to provide knowledge and insight into the cultural inheritance of the area, the Society is a resource encouraging and assisting individuals, the public sector, and private organizations concerned with historic preservation.

The Society was founded in 1958, and is governed by a 17-member board of trustees. It has over 400 members. The Society’s first president was Robert H. Pelletreau, a direct descendent of the well-known silversmith from the Revolutionary period, Robert Pelletreau. New members and volunteers are always welcome.