 In the Thonburi Kingdom, it was named "Mueang Kamnoed Nopphakhun".King Nangklao (Rama III) of Rattanakosin established Kamnoed Nopphakhun as a fourth-class city under the "Kalahom" (defence ministry).King Chulalongkorn (Rama V) downgraded the city to Mueang Kamnoed Nopphakhun District.