The Wūsūn (literally "Grandchildren of The Crow") are a nomadic steppe people who, according to the Chinese histories, originally lived in western Gansu in northwest China near the Yuezhi people.

After being defeated by the Xiongnu (circa 176 BCE) they flee to the region of the Ili river and (lake) Issyk Kul where they remain for at least five centuries and form a powerful force.

They are mentioned in Chinese historical sources in 436 CE, when a Chinese envoy is sent to their country and the Wusun reciprocate.Their later fate is connected with the Turkic Kaganates and the sudden reversals of fortune that fall on Central Asia and, specifically, the Zhetysu area.

Considerable traces of their impact on surrounding peoples and events are left in Persian, Muslim, Turkic, and Russian sources extending from the 6th century CE to the present.

The modern Uysyn who number approximately 250,000 people, are regarded by some as the modern descendants of the Wusun.

The Uysyn have two branches, Dulat and Sary Uysyn ("Yellow Uysyn").Archaeological evidence and textual account suggest Wusun may be a Caucasian people, however, they are not conclusive evidence.

In the 7th century, Chinese commentator Yan Shigu describes the Wusun as having Europoid features which may indicate that they were of Tocharian stock.