The Roman Catholic Diocese of Kisii () is a diocese located in the city of Kisii in the ecclesiastical province of Kisumu in Kenya.
History May 21, 1960: Established as Diocese of Kisii from the Diocese of Kisumu
Bishops Bishops of Kisii (Roman rite) Bishop Maurice Michael Otunga (21 May 1960 – 15 Nov 1969), appointed Coadjutor Archbishop of Nairobi; future Cardinal Bishop Tiberius Charles Mugendi (15 Nov 1969 – 17 Dec 1993) Bishop Joseph Mairura Okemwa (since 19 Dec 1994)
Other priest of this diocese who became bishop Joseph Obanyi Sagwe, appointed Bishop of Kakamega in 2014
See also Roman Catholicism in Kenya Kenya Conference of Catholic Bishops
Sources GCatholic.org Catholic Hierarchy