The Broadback River (French: Rivière Broadback) is a river in northern Quebec, Canada. It drains into Rupert Bay (a smaller bay at the south end of James Bay), just south of the Rupert River and Cree community Waskaganish. The major lake on the river's course is Lac Evans.The Broadback, together with the Nottaway and Rupert Rivers, was initially considered to be dammed and diverted as part of the James Bay Project.