Ivaí River

The Ivaí River (Portuguese, Rio Ivaí ) is a river of Paraná state in southern Brazil. It is a tributary of the Paraná River. Its official spelling is Ivaí, with variants including Ivahy and Ival.

The river basin is ecologically very degraded, with fragile and vulnerable soil. It contains the 8716 ha Perobas Biological Reserve, a strictly protected conservation unit created in 2006.