Onega River

Onega Russian: Онега
The Onega in Severoonezhsk
Country	Russia
Basin features
Main source	Lake Lacha 117 m (384 ft)
River mouth	White Sea 0 m (0 ft)
Basin size	56,900 square kilometres (22,000 sq mi)
Physical characteristics
Length	416 km (258 mi)
Discharge	Average rate: 505 cubic metres per second (17,800 cu ft/s)

Coordinates: 63°53′06″N 37°59′17″E / 63.88500°N 37.98806°E / 63.88500; 37.98806

The Onega (Russian: Оне́га; Finnish: Äänisjoki) is a river in Kargopolsky, Plesetsky, and Onezhsky Districts of Arkhangelsk Oblast in Russia. The Onega connects Lake Lacha with the Onega Bay in the White Sea southwest of Arkhangelsk, flowing in the northern direction. The discharge at the source is 74.1 cubic metres per second (2,620 cu ft/s) and at the mouth is 505 cubic metres per second (17,800 cu ft/s). The river is 416 kilometres (258 mi) long, and the area of its basin 56,900 square kilometres (22,000 sq mi). Its main tributaries are the Voloshka (right), the Kena (left), the Mosha (right), the Kodina (right), and the Kozha (left). The major tributary of the Lake Lacha is the Svid.

The name of the river is traditionally explained as related to Finnish Enojoki - the main river, stream.