The Rio Tibagi is a river in Paraná state in southern Brazil, flowing northward as a tributary of the Paranapanema River. The river passes through the municipality of Tibagi and is notable for its irregular riverbed, which features hollows carved by erosive water action and rapids formed where diabase dykes intersect the channel. The river flows over sandstones and conglomerates of the Itararé Group as well as shales of the Ponta Grossa Formation, giving it a geologically varied character.

Rafting is the primary paddling activity on the Rio Tibagi, and the river is considered one of the more exciting whitewater destinations in Paraná. Several commercial operators run guided rafting trips in the Tibagi area, including TibagiAventuras and Orbitur Adventures. These operators provide safety equipment including life jackets, helmets, and paddles, and trips are led by experienced guides who give safety briefings before launching. Prior swimming ability is not required to participate in the commercial rafting trips. Operators also typically have facilities such as changing rooms and offer photography services on the water.

The river runs near the Cânion Guartelá, which is a notable natural landmark in the region and adds scenic interest to trips in the area. The Rio Tibagi also supports a variety of fish species, including trahira, spotted pimelodus, redbreast tilapia, speckled peacock bass, boga, and threespot leporinus, reflecting the river's ecological diversity.

The river carries historical significance as well, having served as an important geographic landmark for travelers moving through Paraná's second plateau since colonial times, and the region has historical associations with diamond prospecting along its banks and tributaries.