Rokan River is a river in Riau province, central-eastern Sumatra, Indonesia. The river sourced from the Barisan Mountains in the west, and drained northeast-ward along Rokan Hulu Regency and Rokan Hilir Regency with estuarine located near the port town of Bagansiapiapi draining the water to Malacca Strait. Tributaries include the Rokan-kiri River, Rokan-kanan River, Kumu River.