Geng Kui, born in Xianyang, Shaanxi, was a Chinese general of the Eastern Han dynasty. He was sent by Dou Xian to defeat the unnamed Northern Chanyu, leader of the Xiongnu. He achieved this in 91 AD, shortly after the Battle of the Altai Mountains. The Northern Chanyu was defeated once more and fled away, abandoning his kingdom. It is unknown where he went or what became of him.