The Abitibi River is a river in northeastern Ontario, Canada, which flows northwest from Lake Abitibi to join the Moose River which empties into James Bay. This river is 540 kilometres (340 mi) long, and descends 265 metres (869 ft). It is the ninth longest river in Ontario, Behind the Ottawa River (1,271km), St. Lawrence River (1.197km), Severn River (982km), Albany River (982km), Winnipeg River (813km), Attawapiskat River (748km), English River (615km) and Moose River(547km).