Lan Sang National Park (Thai: อุทยานแห่งชาติลานสาง) is located in the Dawna Range, Tak Province, northern Thailand. Established in 1979, it is an IUCN Category II protected area measuring 104 square kilometres (40 sq mi). Situated on the Tak-Mae Sot Highway in Mueang Tak District, it became the country's 15th national park.