Siege of Luoyang can refer to any of the following sieges of the Chinese city of Luoyang, which served as imperial capital to a number of Chinese dynasties:
Siege of Luoyang (303–304), by Sima Ying and Sima Yong Siege of Luoyang (308), by Wang Mi Siege of Luoyang (309), by Liu Cong Siege of Luoyang (538), by Gao Huan Siege of Luoyang (613), by Yang Xuangan Siege of Luoyang (618), by Li Mi Siege of Luoyang (620–621), by Li Shimin Siege of Luoyang (1234), during the Mongol conquest of the Song dynasty
See also Disaster of Yongjia Battle of Luoyang (328–329)