The Nun River is a river in Nigeria. The Nun is formed when the Niger River splits in two, forming the Nun and Forcados rivers.
The Nun River is immortalised in the poetry of Gabriel Okara. His poem "The Call of the River Nun" is a nostalgic ode to the river that passes through his home.
(Nun River may also be an alternative name for the Nen River in Manchuria.)