Signal Hill is a 150-acre (61 ha) open space preserve located in Canton, in the U.S. state of Massachusetts; it is centered on a 188-foot (57 m) rocky knoll by the same name.

The property, acquired in 2005 by the land conservation non-profit organization The Trustees of Reservations, offers frontage on the Neponset River and views of Great Blue Hill and Downtown Boston from open ledges.

The Signal Hill preserve also includes wetlands, open fields, and a car-top boating access point.

[1] Signal Hill contains the Wamsutta archaeological site, discovered during construction of Interstate 95, which was a seasonal camp for Paleo-Indians radiocarbon dated by nearby charcoal remains to 12,140 before present,[2] around the time of the last glacial retreat, when rapid melting of the Wisconsin continental glacier created the mile-wide channel through which today's Neponset River flows.

The preserve is open to non-motorized carry-in boating, hiking, picnicking, fishing, and similar pursuits.