Daniel Deng Bul Yak (born Tuic-Gebiet, in Bor, 2 January 1950) is a South Sudanese Episcopalian bishop.

He decided to follow religious life, studying in Bishop Gwynne College, in Juba, from 1975 to 1977, when he won his certificate.

He was elected primate and archbishop of the Episcopal Church of Sudan in a synod that took place on 14 February 2008, being enthroned in All Saints Cathedral, Juba, on 20 April 2008.

He was appointed in 2012 by the President of the Republic of South Sudan as the Chairperson of the Presidential Committee for Peace, Reconciliation and Tolerance to spearhead communities peace process in Jonglei State in South Sudan.

Later, he was appointed again in 2013 by a presidential decree to head the National Committee for Peace, Reconciliation and Healing.