Emperor Xizong of Tang June 8, 862 – April 20, 888), né Li Yan, later name changed to Li Xuan (changed 873), is an emperor of the Tang dynasty of China.

He reigns from 873 to 888.

He is the fifth son of his predecessor Emperor Yizong and is the elder brother of his successor Emperor Zhaozong.

His reign sees his realm overrun by the great agrarian rebellions led by Wang Xianzhi and Huang Chao, and while both are eventually defeated, by the end of Emperor Xizong's reign, the Tang state has virtually disintegrated into pieces ruled by individual warlords, rather than the imperial government, and will never recover, falling eventually in 907.