The Wannock River is a short river in the Central Coast region of British Columbia, Canada, draining Owikeno Lake and entering Rivers Inlet at the head of that inlet, adjacent to the town of the same name, which is the main modern settlement of the Wuikinuxv (Owikeno) people.  Katit Indian Reserve No. 1 is located around the banks of the river, including Katit Island, which is an island in the river.