Li Yu may refer to:
- Emperor Suzong of Tang (711-762), name Li Yu (李璵), Chinese emperor of the Tang Dynasty
- Emperor Daizong of Tang (727-779), name Li Yu (李豫), Chinese emperor of the Tang Dynasty
- Li Yu (prince) (d. 905), Tang Dynasty prince briefly proclaimed emperor
- Li Houzhu (936-978), name Li Yu (李煜), last emperor of Southern Tang in southern China during the 10th century
- Li Yu (author) (1610-1680), Chinese author in the Ming and Qing Dynasties
- Li Yu (speed skater), Chinese Olympic speed skater
- Li Yu (director) (born 1973), Chinese director