Tadun (died 207) was a leader of the Wuhuan tribes during the late Eastern Han dynasty of China.
Throughout the 190s, Tadun supported the warlord Yuan Shao in his power struggle against Gongsun Zan for supremacy in northern China.
After Louban had grown up, Tadun gave the reins of power to him but continued to remain in charge of the Wuhuan tribes in Liaoxi Commandery.
The other Wuhuan chieftains, such as Nanlou (難樓), Supuyan (蘇僕延) and Wuyan (烏延), pledged allegiance to Louban as their new leader.
Both sides clashed at the Battle of White Wolf Mountain near Liucheng (柳城; southwest of present-day Chaoyang, Liaoning).