There are five sub-district municipalities (thesaban tambon). Nikhom Songkhro covers parts of tambon Nikhom Songkhro and Khok Sa-at; Nong Bua parts of tambon Nong Bua, Nong Na Kham, Sam Phrao, and Nong Khon Kwang; Ban Chan parts of tambon Ban Chan and Nong Khon Kwang; Na Kha parts of tambon Na Kha.
The area is divided into five sub-district municipalities (thesaban tambon), with Nikhom Songkhro encompassing portions of Nikhom Songkhro and Khok Sa-at, while Nong Bua covers areas in Nong Bua, Nong Na Kham, Sam Phrao, and Nong Khon Kwang; Ban Chan covers parts of Ban Chan and Nong Khon Kwang; and Na Kha covers portions of Na Kha.