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.

As of 2014[update], it pastorally served 79,000 Catholics (1.2% of 6,742,000 total) on 66,102 km2 in 23 parishes and 1 mission with 39 priests (34 diocesan, 5 religious), 18 lay religious (9 brothers, 9 sisters) and 13 seminarians.

This article about a Roman Catholic diocese in Nigeria is a stub.