Stone Zoo is a medium- to small-sized zoo of about 26 acres (11 ha) in Stoneham, Massachusetts, United States. Founded in 1905, the zoo includes low-lying areas densely developed with smaller exhibits for animals as well as rocky forested hillsides devoted to larger habitats for Species Survival Plan programs. It is operated by the Commonwealth Zoological Corporation, doing business as Zoo New England, which also operates the Franklin Park Zoo in Boston.