Li Yu may refer to:
- Emperor Suzong of Tang (711–762), personal name Li Yu, emperor of the Tang dynasty
- Emperor Daizong of Tang (727–779), personal name Li Yu, emperor of the Tang dynasty, Emperor Suzong's son
- Li Yu, Prince of Dan (died 820), Emperor Daizong of Tang's son
- Li Yu, Prince of De (died 905), Emperor Zhaozong of Tang's son, briefly a puppet emperor
- Li Yu (Later Tang) (died 935), chief councilor of the Later Tang dynasty
- Li Yu (Southern Tang) (937–978), ruler of the Southern Tang dynasty, also a famous poet
- Li Yu (author) (1610–1680, Chinese: 李漁), Chinese author during the Ming and Qing dynasties
- Li Yu (speed skater) (born 1961, Chinese: 李雨), Chinese short track speed skater
- Li Yu (director) (born 1973, Chinese: 李玉), Chinese film director and screenwriter
- Li Yu (politician) (1906–1986, Chinese: 黎玉), Former Secretary of the CCP Shandong Provincial Committee, Vice Minister of the Ministry of Agricultural Machinery of China.