The Psefir (Russian: Псефирь) is a river in Krasnodar Krai, Russia, which flows into the Fars. It is 67 kilometres (42 mi) long, and has a drainage basin of 378 square kilometres (146 sq mi). The area around the river is populated by various Abadzekh and Circassian tribes. The stanitsa of Kostromskaya stands on the river.