 In the Rattanakosin era, the area was populated by a large community of Lao people from Vientiane.The population grew due to further immigration from Luang Prabang and Vientiane, so the governor led some people to establish a new town near the Pa Sak River, now in the Lom Sak District.Neighboring districts are (from the north clockwise) Dan Sai and Phu Ruea of Loei Province and Nam Nao, Lom Sak, and Khao Kho of Phetchabun Province.