Li Jifu (李吉甫) (758 – November 18, 814), courtesy name Hongxian (弘憲), formally Duke Zhongyi of Zhao (趙忠懿公), was an official of the Chinese dynasty Tang Dynasty, serving as a chancellor during the reign of Emperor Xianzong.
Li Jifu was born in 758, during the reign of Emperor Suzong. His family claimed ancestry from Li Mu, a prominent general of the Warring States period state Zhao, and traced its ancestry through a line of officials of Qin Dynasty, Han Dynasty, Cao Wei, Jin Dynasty (265-420), Northern Wei, and Sui Dynasty. His grandfather Li Zai (李載) was not recorded to have carried any official titles, but his father Li Qiyun (李栖筠) was a prominent official during the reign of Emperor Suzong's son Emperor Daizong and served as chief imperial censor, carrying the title of Duke of Zanhuang. Li Jifu himself was said to be studious in his youth and capable in writing.
In 784, during the reign of Emperor Daizong's son Emperor Dezong, when Li Jifu was 26, Li Jifu became a Taichang Boshi (太常博士), a consultant at the ministry of worship (太常寺, Taichang Si), and became known for his knowledge, especially the past Tang tradition, and was often praised for it. In 786, when Emperor Dezong's wife Empress Wang died, the regulation on the proper rituals were missing — as there had not been an empress who was mourned since the times of Emperor Suzong's father Emperor Xuanzong. Li Jifu planned the mourning ceremonies for Empress Wang, and was much praised by Emperor Dezong.