|Length||115 km (71 mi)|
|Basin area||2,210 km2 (850 sq mi)|
Piz River (Russian: Пизь) is a right tributary of the Buy River. It is 151 kilometres (94 mi) long, with a drainage basin of 2,210 square kilometres (850 sq mi). It starts in the Elovsky District of Perm Krai, then flows through Chaikovsky District on the border with Bashkortostan. It empties into the Buy River on the border between the Udmurt Republic and Bashkortostan, 20 kilometres (12 mi) from the larger river's mouth.
- Left: Bolshaya Usa
- Right: Posha