Which city does Cao County belong to?

It belongs to Heze City, Shandong Province.

Cao County is a county under the jurisdiction of Heze City, Shandong Province. Caoxian County is located in the southwest of Shandong Province, at the junction of eight counties in Lu Yu Province, with Shangqiu and Quan Min in the south, Heze and Dingtao in the north, Shanxian and Chengwu in the east and Dongming and Lankao in the west.

The terrain of Cao Xian County inclines from southwest to northeast, with the highest point in southwest being 66.8 meters above sea level and the lowest point in northeast being 44.8 meters above sea level, with a height difference of 22 meters. All breaches of the Yellow River have had a decisive influence on the formation of China landform. Due to the constant change of flow direction and velocity, a complex landform has been formed.