Zhoukou is a prefecture-level city in eastern Henan province, China. It borders Zhumadian to the southwest, Xuchang and Luohe to the west, Kaifeng to the northwest, Shangqiu to the northeast, and the province of Anhui on all other sides. As of the 2020 census, its population was 9,026,015 inhabitants. However, as of the 2018 estimation, 1,601,300 lived in the built-up made up of Chuanhui district and the northern part of Shangshui county.