Удонтхани
Neighboring districts are (from the north clockwise) Sangkhom, Pho Tak, Tha Bo, and Sakhrai of Nong Khai Province, Phen, Mueang Udon Thani, and Kut Chap of Udon Thani Province, Suwannakhuha of Nong Bua Lamphu Province, and Nam Som and Na Yung of Udon Thani.