Zhangwu County (Chinese: 彰武; pinyin: Zhāngwǔ) is a county in the north of Liaoning province, China. It is under the administration of Fuxin City, the centre of which lies 82 kilometres (51 mi) to the southwest, with a population of 410,000 residing in an area of 3,635 km² (1,403 sq mi).