Pailin (Khmer: ប៉ៃលិន, Khmer pronunciation: [pai lɨn]) is a province (khaet) in western Cambodia at the northern edge of the Cardamom Mountains near the border of Thailand. This province is surrounded by Battambang Province, and was officially carved out of Battambang to become a separate administrative division after the surrender of the Ieng Sary faction of the Khmer Rouge in 1996.