The Nizhnyaya Tunguska (Russian: Ни́жняя Тунгу́ска, meaning Lower Tunguska) is a river in Siberia, Russia, that flows through the Irkutsk Oblast and the Krasnoyarsk Krai. The river is a right tributary of the Yenisey joining it at Turukhansk (see Siberian River Routes). The ice-free period on the Nizhnyaya Tunguska starts in mid-June and ends in the first half of October. The river forms the western limit of the Lena Plateau.
The Nizhnyaya Tunguska is the second largest right tributary of the Yenisey, and joins it near the town of Turukhansk. It is 2,989 kilometres (1,857 mi) long, and has a drainage basin of 473,000 square kilometres (183,000 sq mi).
