Bishops
- Joseph Luechai Thatwisai, appointed November 14 2009
- George Yod Phimphisan, C.Ss.R.: October 2 1975 - November 14 2009 (resigned)
- Clarence James Duhart, C.Ss.R.: 1953 - October 2 1975 (resigned)
Read more about this topic: Roman Catholic Diocese Of Udon Thani