Rainy River can refer to:
Rainy River (British Columbia), a short river that flows into the Howe Sound Rainy River (Marlborough), a tributary of the Pelorus River, Marlborough District, New Zealand Rainy River (Michigan), tributary of the Black River Rainy River (Minnesota–Ontario), part of the United States-Canada border between Minnesota and Ontario Rainy River (Tasman), a river in the Motueka River catchment, Tasman District, New Zealand Rainy River, Ontario, a town on the river Rainy River First Nations, an Ojibway First nation in Northwest Ontario Rainy River District