Zhengyi

Zhengyi or Zheng Yi (Wade–Giles: Cheng I) may refer to:


 * Zhengyi Dao, a Daoist movement founded by Zhang Daoling
 * Zhengyi, a lich character from Dungeons & Dragons
 * Zheng Yi (author) (郑义; born 1947), of Scarlet Memorial: Tales of Cannibalism in Modern China
 * Zheng Yi (pirate) (鄭一; 1765–1807), a Chinese pirate of the South China Sea