Changtu County is a county located in the northeastern region of Liaoning province, China. It serves as a border area situated between Jilin province to the northeast and Inner Mongolia to the northwest.
The county falls under the administration of Tieling City, which is located approximately 60 kilometres (37 mi) to the south-southwest. It is also positioned about 47 kilometres (29 mi) southwest of Siping in Jilin province. The area is accessible via China National Highway 102 and the G1 Beijing–Harbin Expressway.