Mengcheng County (Chinese: 蒙城县; pinyin: Méngchéng Xiàn) is a county of Anhui Province, China. It is under the administration of Bozhou city, bordering Lixin County. It is famous for its beef production and for Zhuangzi, 4th century BCE philosopher. Niu Qun, a well-known comedian, used to serve as deputy magistrate of Mengcheng County.