ABSTRACT This study aims to analyze the agribusiness of Orange Siam in Pematang Tebih Village. This study was conducted in Ujung Batu Subdistrict, Rokan Hulu District. The respondent technique was taken by purposive sampling with 26 farmers. On farm agribusiness subsystem, total cost production of siam orange is IDR 30.621.581/year. Total income of siam orange is IDR 45.202.830/year. The value…