Li Xiaogong (591–640), formally Prince Yuan of Hejian, often referred to by his earlier title as Prince of Zhao Commandery, is an imperial prince and general of the Chinese dynasty Tang Dynasty.

He is a son of a cousin of the founding emperor Emperor Gaozu and serves as a major general during Emperor Gaozu's reign, defeating the major competitor Xiao Xi the Emperor of Liang and the rebel general Fu Gongshi the Emperor of Song.

He is one of the few generals of early Tang who distinguishes himself without having first served under Emperor Gaozu's son Li Shimin (the later Emperor Taizong).