| Yang Ding 楊定 | |
|---|---|
| Duke of Chouchi (仇池公) | |
| Reign | 385–394 |
| Predecessor | Yang Cuan |
| Successor | Yang Sheng |
| Prince of Longxi (隴西王) (self-appointed) | |
| In office 389–394 | |
| Monarch | Fu Deng |
| Personal details | |
| Born | Unknown Wudu District, Longnan, Gansu |
| Died | 394 |
| Spouse | Lady Fu |
| Parent |
|
| Posthumous name | Prince Wu (武王) |
Yang Ding (died 394) was a ruler of Chouchi and a military general of Former Qin during the Sixteen Kingdoms period. His family was a part of the Yang clan that ruled Chouchi but fled to Former Qin after they failed to usurp their relatives' throne. Yang Ding became the son-in-law of Qin's ruler, Fu Jian, and after the Battle of Feishui, he became one of the state's most powerful supporters up to its destruction in 394. However, he also took advantage of Qin's period of weakness by restoring the Chouchi state in 385, which had been conquered by Qin in 371. His reign is seen as the start of Later Chouchi (後仇池).