Pyakupur River (Russian: Пякупур) is a river in Yamalo-Nenets Autonomous Okrug, Russia, the left tributary of the Pur River. The length of the Pyakupur River is 542 km. The area of its basin is 31,400 km². There are approximately 32,600 lakes in the river basin. The main tributaries: Vyngapur (right) and Purpe (left). The river's peak month of discharge is June.