Midu County () is a county in the Dali Bai Autonomous Prefecture located in the northwest of Yunnan province, China. It borders Xiangyun County and Nanhua County to the east, Jingdong County and Nanjian County to the south, Weishan County to the west and Dali City to the north.
Midu County has 6 towns, 1 township and 1 ethnic township.
The Midu County Gazetteer (1993:721) lists the following ethnic groups.