Han Cheng (died 206 BC), also referred to as Cheng, King of Han in some Chinese historical texts, was a ruler of the Kingdom of Hán (韓國) of the Eighteen Kingdoms during the Chu–Han Contention, an interregnum between the Qin and Han dynasties of China.
In 209 BC, when uprisings against the Qin dynasty broke out throughout China, Han Cheng joined Xiang Liang's rebel group, hoping to leverage on their military power to revive the Hán state.
Along the way, he met Zhang Liang, a descendant of a bureaucratic family of the former Hán state.
Xiang Liang also provided some troops to Han Cheng and allowed him to attack the Qin garrison at Yingchuan.
Months later, Xiang Yu killed Han Cheng and replaced him with Zheng Chang.