The Iriri River (Portuguese: Rio Iriri [ˈʁi.u iɾiˈɾi]; Mẽbêngôkre: Kororoti [kɔˌɾɔɾɔˈti][1]: 40 ) is a large tributary of the Xingu River in Brazil, in the state of Pará.

The river rises in the 342,192-hectare (845,570-acre) Nascentes da Serra do Cachimbo Biological Reserve, a strictly protected conservation unit established in 2005 in the Serra do Cachimbo.

[3] It flows for 900 kilometres (560 mi) before joining the Xingu, running through the 3,373,133.89-hectare (8,335,195.4-acre) Terra do Meio Ecological Station.

[5] The river is rich in fish, including many species found only there and in the Xingu.

This article related to a river in Pará, Brazil is a stub.