Cheng Ji or Ji Cheng may refer to:
People with the surname Cheng Cheng Ji (Shu Han) (died 222), Han dynasty military officer who later served Shu Han during the Three Kingdoms period Cheng Ji (Wuyue) (847–913), Tang dynasty military officer who later served the Wuyue kingdom during the Five Dynasties period Cheng Ji (成濟), a Cao Wei military officer in the Three Kingdoms period. He assassinated Cao Mao, the fourth Wei emperor. See Coup of Cao Mao.
People with the surname Ji Duke Wu of Jin Ji Cheng (Ming dynasty) (1582–1642), Ming dynasty garden designer Ji Cheng (cyclist) (born 1987), Chinese cyclist