Yuncheng (simplified Chinese: 郓城; traditional Chinese: 鄆城; pinyin: Yùnchéng) is a county in the southwest of Shandong province, China. It is the northernmost county-level division of the prefecture-level city of Heze. It borders the Yellow River and Henan (Taiqian County and Fan County) to the north, Liangshan County to the northeast, Jiaxiang County to the east, Juye County to the southeast, and Mudan District to the southwest, and Juancheng County to the west. It stretches 44 km (27 mi) from north to south and 36 km (22 mi) from east to west.