Zheng Chang was a ruler of the Kingdom of Hán (韓國) of the Eighteen Kingdoms during the Chu–Han Contention, an interregnum between the Qin Dynasty and the Han Dynasty. Zheng Chang was initially the magistrate of Wu County (吳縣) during the Qin Dynasty. He was an acquaintance of Xiang Yu, and followed the latter in rebelling against Qin around 209 BC. After the fall of Qin in 206 BC, Xiang Yu divided the former Qin Empire into the Eighteen Kingdoms, and appointed Han Cheng as "King of Hán" (韓王). Months later, Xiang Yu had Han Cheng killed and replaced with Zheng Chang. Later that year, Hán Xin attacked the Hán kingdom with support from Liu Bang and defeated Zheng Chang. Zheng Chang surrendered and was replaced by Hán Xin.