Haiyuan County is a county under the administration of the prefecture-level city of Zhongwei in the southwest of the Ningxia Hui Autonomous Region of China. It is bordered by Gansu to the west. The county has a total area of 6,897 km2 (2,663 sq mi), and a population of approximately 470,000 people as of 2019. It was the site of the 1920 Haiyuan earthquake, which killed at least 200,000 people within and outside of Haiyuan.