The Ussuri River (Chinese: Wūsūlǐ Jīang 乌苏里江, Russian: река Уссури) is a river in south east Russia, flowing north, forming part of the Chinese border, to the Amur River. It is approximately 897 km (500 miles) in length. The area of the Ussuri basin is 193,000 sq km. Its waters come from rain (60%), snow (30-35%) and subterranean springs. The Ussuri River is known for its catastrophic floods. It freezes up in November and stays under the ice until April. The river teems with different kinds of fish: grayling, sturgeon, humpback salmon (gorbusha), chum salmon (keta) and others.

The Sino-Soviet border conflict of 1969 took place on the Ussuri River.