Cishan District is a suburban district in northeastern Kaohsiung, Taiwan. It has an area of 94.61 square kilometers, or 36.53 square miles. The population of Cishan is 34,372 as of October 2023. It is the 19th most populous district in Kaohsiung.

National Freeway 3, also known as Formosa Freeway, is a freeway in Taiwan. It is the second north–south freeway in Taiwan, beginning in Keelung City at Jijin Interchange on the provincial highway 2 and ending in Linbian, Pingtung on the provincial highway 17. It is the longest freeway in Taiwan with a total length of 431.5 km (268.1 mi). The freeway is also the only one in Taiwan to have a spur route, Freeway 3A.