Bikin (Russian: Бики́н) is a river in Primorsky and Khabarovsk Krais in Russia. It is a right tributary of the Ussuri River, and is 560 kilometres (350 mi) long, with a drainage basin of 22,300 square kilometres (8,600 sq mi).
Main tributaries are the Alchan, Bachelaza and Zeva rivers.
The town Bikin is situated at the Bikin River.
In 2015, a significant portion of the Bikin River basin was incorporated into the creation of Bikin National Park, one of the major protected areas of the Russian Federation.
Coordinates: 46°51′07″N 134°02′12″E / 46.85194°N 134.03667°E