Ordinaries
- John Bosco Panya Kritcharoen: appointed March 18, 2005
- John Bosco Manat Chuabsamai: November 25, 1985 - July 24, 2003 (resigned)
- Joseph Ek Thabping: October 2, 1975 - February 12, 1985 (died)
- Robert Ratna Bamrungtrakul: June 26, 1969 - April 28, 1975 (became bishop of Chiang Mai)
- Pietro Luigi Carretto, S.D.B.: April 12, 1951 - June 26, 1969 (became bishop of Surat Thani)
- Gaetano Pasotti, S.D.B.: May 28, 1934 - September 3, 1950 (died)
Before 1965 the administrator of the prefecture or vicariate was a vicar or prefect, but had the bishop title of a titular church.
Read more about this topic: Roman Catholic Diocese Of Ratchaburi