Xolelo Thaddaeus Kumalo (born 2 July 1954) is a South African Catholic prelate who serves as bishop of the Roman Catholic Diocese of Witbank, in the Ecclesiastical Metropolitan Province of Johannesburg in South Africa since 25 November 2020. Before that, from 11 March 2008 until 25 November 2020, he was the bishop of the Roman Catholic Diocese of Eshowe in the Catholic Archdiocese of Durban. He was appointed bishop by Pope Benedict XVI. He was consecrated and installed at Eshowe on 7 June 2008 by , Bishop of Bethlehem, South Africa. On 25 November 2020, Pope Francis transferred him to the Diocese of Witbank and appointed him local ordinary there. He was installed at Witbank on 20 March 2021.
Xolelo Thaddaeus Kumalo was born on 2 July 1954 at Gogela, Umzimvubu, Diocese of Kokstad, Eastern Cape, in South Africa. He studied both philosophy and theology at seminary before he was ordained a priest. He studied at the Saint John Vianney National Major Seminary, in Pretoria, which is affiliated with the Pontifical Urban University, in Rome, Italy.
He was ordained a priest for the Roman Catholic Diocese of Bethlehem, South Africa on 10 October 1991. He served as a priest until 11 March 2008. While a priest, he served in various roles and locations including the following, among others:
On 11 March 2008, Pope Benedict XVI appointed Reverend Father Xolelo Thaddaeus Kumalo, previously Vicar General of the Catholic Diocese of Bethlehem in South Africa, as the new bishop of the Diocese of Eshowe, South Africa. He was consecrated and installed at Eshowe on 7 June 2008 by , Bishop of Bethlehem assisted by Cardinal Wilfrid Fox Napier, Archbishop of Durban and Buti Joseph Tlhagale, Archbishop of Johannesburg. Pope Francis transferred Bishop Xolelo Thaddaeus Kumalo, previously the local ordinary at Eshowe to the Diocese of Witbank on 25 November 2020. He continues to serve as the local ordinary at Witbank.