Phanom Thuan covers the central part of the sub-district Phanom Tuan, Talat Khet the part central of Rang Wai. The municipality Rang Wai covers the remaining parts of the sub-district, and Nong Sarai the whole of the same-named tambon.
Phanom Thuan is situated at the heart of sub-district Phanom Tuan, Talat Khet is in the central part of Rang Wai. The municipality Rang Wai oversees the rest of the sub-district area, and Nong Sarai manages the entire named tambon.