Prosper Bonaventure Ky (born 10 January 1965) is a Burkinabe Catholic prelate who serves as Bishop of the Roman Catholic Diocese of Dédougou, Burkina Faso, since 24 April 2018. Before that, from 23 July 1994 until 24 April 2018, he was a priest of the Roman Catholic Diocese of Nouna-Dédougou, Burkina Faso. He was appointed bishop on 24 April 2018 by Pope Francis. He was consecrated and installed at Dédougou, on 21 July 2018 by Cardinal Philippe Nakellentuba Ouédraogo, Archbishop of Ouagadougou.
He was born on 10 January 1965 in Toma, in the diocese of Dédougou, Burkina Faso. He studied philosophy at the Major Seminary of Saint-Jean-Baptiste in Wayalgê, Ouagadougou. He then studied theology at the Major Seminary of Saint-Pierre Claver in Koumi, Bobo-Dioulasso. He also holds a Doctorate in psychology awarded by the Pontifical Salesian University in Rome, Italy, where he studied from 2003 until 2010.
He was ordained a priest on 23 July 1994. He served as priest until 24 April 2018.
While a priest, he served in many roles including as:
On 24 April 2018, Pope Francis appointed him as bishop of the Roman Catholic Diocese of Dédougou. He was consecrated and installed at Dédougou, Burkina Faso on 21 July 2018 by the hands of Cardinal Philippe Nakellentuba Ouédraogo, Archbishop of Ouagadougou assisted by Archbishop Paul Yemboaro Ouédraogo, Archbishop of Bobo-Dioulasso and Bishop Jean-Gabriel Diarra, Bishop of San.