Belanglo State Forest is a planted forest in the Australian state of New South Wales covering an area of about 3,500 hectares. It is south of Berrima in the Southern Highlands, five kilometres west of the Hume Highway between Sydney and Canberra. The forest is owned by the New South Wales Government and has some of the earliest pine plantings in the state. The public has free access to the forest; it is popular with recreational trail bike riders.