Liu Ding (Chinese: 劉定, Liú Dìng), Prince of Shanyang (山陽王, Shānyángwàng), was a prince of the Han dynasty.
He was the fourth son and heir of Liu Wu, Prince of Liang.
He did not receive all of his father's inheritance; instead, his uncle the emperor Jing divided the Liang Kingdom into five pieces.
Liu Ding ruled Shanyang from 144 to 136 BC.
[1] He died without leaving any sons and was given the posthumous name Ai (哀, "lamentable").