Emperor Wuzong of Tang (July 2, 814 – April 22, 846), né Li Chan, later changed to Li Yan just before his death, is an emperor of the Tang Dynasty of China, reigning from 840 to 846.

Emperor Wuzong is mainly known in modern times for the religious persecution that occurred during his reign.

In addition, he was known for his successful reactions against incursions by remnants of the Huigu Khanate and the rebellion by Liu Zhen, as well as his deep trust in the chancellor Li Deyu.