Royalston Falls is a 50 foot (15 m) waterfall and granite gorge located in Royalston, Massachusetts along Falls Brook, a tributary of the Tully River which in turn is a tributary of the Millers River.

The falls are part of a 217-acre (88 ha) open space preserve acquired in 1951 by the land conservation non-profit organization The Trustees of Reservations.

[2] The falls were previously the site of a town recreation area which included a playground; it was also the location of a casino.

The preserve is open to fishing, walking, picnicking, mountain biking, horseback riding, hunting (in season), cross country skiing, and hiking.

Royalston Falls are part of a larger contiguous area of protected open space, connected by the Tully Trail and including the United States Army Corps of Engineers' Tully Lake flood control project, The Trustees of Reservations' Jacobs Hill and Doane's Falls properties, and Massachusetts state forest land.