The Chaubunagungamaug Reservation refers to the small parcel of land located in the town of Thompson, Connecticut, close to the border with the town of Webster, Massachusetts, and within the bounds of Lake Chaubunagungamaug to the east and the French River to the west. The reservation is used by the descendants of the Nipmuck Indians of the previous reservation, c. 1682–1869, that existed in the same area, who now identify as the Webster/Dudley Band of the Chaubunagungamaug Nipmuck.