The Kolyma River is a river in northeastern Siberia, whose basin covers parts of the Sakha Republic, Chukotka Autonomous Okrug, and Magadan Oblast of Russia. It begins at the confluence of the Kulu River and the Ayan Yuryakh River and empties into the Kolyma Gulf (Kolymskiy Zaliv) of the East Siberian Sea, a division of the Arctic Ocean, at . The Kolyma is long. The area of its basin is .