Cleophas Oseso Tuka (born 26 November 1967) is a Kenyan Catholic prelate who serves as the Bishop of the Roman Catholic Diocese of Nakuru. He was appointed bishop of Nakuru on 15 February 2023 by Pope Francis.
He was born on 26 November 1967, in Naivasha, Nakuru County in the Diocese of Nakuru, in Kenya. He studied Philosophy at Saint Augustine's Senior Seminary in Mabanga, in the Diocese of Bungoma. He then transferred to the St. Matthias Mulumba Tindinyo Seminary in Nandi County where he studied Theology.
He holds a degree of Master of Business Administration awarded by the Le Moyne College, in DeWitt, New York State, United States. Later, he graduated with a Doctorate in Education from the Graduate Theological Foundation, in Sarasota, Florida, United States.
He was ordained a priest of the Diocese of Nakuru on 24 June 1995. He served in that capacity until 15 February 2023.
As a priest, he served in various roles inside and outside of his diocese including as:
On 15 February 2023, Pope Francis appointed him as Bishop of the Roman Catholic Diocese of Nakuru. He was consecrated and installed at Nakuru in the Diocese of Nakuru on 6 May 2023. The Principal Consecrator was Archbishop Hubertus Matheus Maria van Megen, Papal Nuncio and Titular Archbishop of Novaliciana assisted by Bishop David Kamau Ng'ang'a, Titular Bishop of Oëa and Archbishop Maurice Muhatia Makumba, Archbishop of Kisumu.
He replaced Archbishop Maurice Muhatia Makumba who served as the Ordinary at Nakuru before he was elevated to archbishop and relocated to Kisumu Archdiocese in February 2022.
(19 December 2009 - 18 February 2022)