The Trustees of Reservations (also referred to as Trustees or The Trustees after a 2021 rebranding) is a non-profit land conservation and historic preservation organization dedicated to preserving natural and historical places in the Commonwealth of Massachusetts. It is the oldest land conservation nonprofit organization of its kind in the world and has 100,000 member households as of 2021. In addition to land stewardship, the organization is also active in conservation partnerships, community supported agriculture (CSA), environmental and conservation education, community preservation and development, and green building. The Trustees owns title to 120 properties on 27,000 acres (11,000 ha) in Massachusetts, all of which are open to the public. In addition, it holds 393 conservation restrictions to protect an additional 20,000 acres (8,100 ha). Properties include historic mansions, estates, and gardens; woodland preserves; waterfalls; mountain peaks; wetlands and riverways; coastal bluffs, beaches, and barrier islands; farmland and CSA projects; and archaeological sites.
The main office of the organization was formerly at Long Hill in Beverly. In 2017, a new headquarters was established in Boston. The Trustees Archives & Research Center (ARC) is located in Sharon. In June 2006, The Trustees earned gold-level recognition from the United States Green Building Council for its Doyle Conservation Center in Leominster.
