The Battle of Jinyang (Chinese: ) was fought in modern-day Taiyuan between the elite families of the State of Jin, the house of Zhao and the house of Zhi (), in the Spring and Autumn period of China. The other houses of Wei and Han first participated in the battle in alliance with the Zhi, but later defected to ally with Zhao to annihilate the Zhi house. This event was a catalyst to the Tripartition of Jin in 434 BC, the forming of the three states of Zhao, Wei, and Han, and the start to the Warring States period. It is the first battle described in the Song Dynasty history compendium Zizhi Tongjian.



The Spring and Autumn period was a period in Chinese history from approximately 770 to 476 BCE (or according to some authorities until 403 BCE) which corresponds roughly to the first half of the Eastern Zhou period. The period's name derives from the Spring and Autumn Annals, a chronicle of the state of Lu between 722 and 479 BCE, which tradition associates with Confucius (551–479 BCE).

During this period, the Zhou royal authority over the various feudal states eroded as more and more dukes and marquesses obtained de facto regional autonomy, defying the king's court in Luoyi and waging wars amongst themselves. The gradual Partition of Jin, one of the most powerful states, marked the end of the Spring and Autumn period and the beginning of the Warring States period.