Belanglo State Forest is a planted forest, of mainly pine but some native forestry around the edges, open to the public, in the Australian state of New South Wales; its total area is about 3,800 hectares. The Belanglo State Forest is located south of Berrima in the Southern Highlands, three kilometres west of the Hume Highway between Sydney and Canberra. The forest is owned by the New South Wales Government and contains some of the earliest pine plantings in the state.