The Diocese of Bauchi (Latin: Bauchian(us)) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Northern Nigeria. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Jos in, yet depends on the missionary Roman Congregation for the Evangelization of Peoples. Its cathedral is the Cathedral of St. John Evangelist, located in the episcopal see of Bauchi in Bauchi State.