Zhangwu County is a county located in the northern part of Liaoning province, China. It falls under the administration of Fuxin City, which is situated approximately 82 kilometres to the southwest of the county center.
As of 2020, Zhangwu County has a population of 333,643 residing within an area of 3,635 square kilometres. The region is served by several major transportation routes, including the G25 Changchun–Shenzhen Expressway, the G2511 Xinmin–Lubei Expressway, and China National Highways 101 and 304.