Emperor Wenzong of Tang (809–840), personal name Li Ang, né Li Han, is an emperor of the Tang Dynasty of China.

He reignw from 827 to 840.

Emperor Wenzong is the second son of Emperor Muzong and younger brother of Emperor Jingzong.

It is a note of interest and a rare occurrence in Chinese history when Emperor Wenzong, along with his elder brother Emperor Jingzong and younger brother Emperor Wuzong, reign in succession to one other from 824 to 846.