Sukhothai Kingdom
The history of Lom Sak area dates back to the founding of the Sukhothai Kingdom in the 13th century. The governor of "Mueang" Rat (Lom Sak), Pho Khun Pha Mueang (พ่อขุนผาเมือง), was one of Thai warlords who defeated the Khmer. When Pho Khun Bang Klang Hao (พ่อขุนบางกลางหาว) and a friend established the Sukhothai Kingdom, he supported his friend to be the first king because his wife was Khmer.