The Chiuni () is a coastal river in the west of the department of Corse-du-Sud, Corsica, France.
The Chiuni is long. It crosses the communes of Cargèse, Marignana and Piana. The Chiuni rises in the commune of Marignana to the west of the Capu a é Macenule. The source is at an altitude of . It flows in a generally east-southeast direction to enter the sea in the Golfe de Chiuni. There is a beach, the Plage de Chiuni, at the mouth of the river. From the beach there is a view of Capu d'Orchinu and its Genoese tower, the Torra d'Orchinu.
The following streams (ruisseaux) are tributaries of the Chiuni (ordered by length) and sub-tributaries: