The Velikaya River, also known as Bolshaya and Onemen (Russian: Великая, Большая, Онемен), is a 556 km long river in Chukotka Autonomous Okrug in Russia. It flows north-eastwards from the Koryak Range through the Anadyrskiy Liman (the Anadyr River estuary) into the Bering Sea at the Gulf of Anadyr. The area of its drainage basin is 31,000 square kilometres (12,000 sq mi). Velikaya (Великая) translates to great in the Russian Language. Bolshaya (Большая) translates to big in Russian.
The Velikaya River and its tributaries belong to the Chukotka Autonomous Okrug.
Latitude: 64° N, Longitude: 176° 15' E
There is a small populated place in the area close to its estuary also called Velikaya. Beluga whales are common in its estuarian waters.
One of the native names of this river is Echinku, so that in some documents referring to this river in Soviet times, it was referred to as Velikaya-Echinku.
Coordinates: 64°00′N 176°15′E / 64.000°N 176.250°E