Roman Catholic Diocese of Oakland

Diocese of Oakland Diœcesis Quercopolitana
Cathedral of Christ the Light
Coat of arms
Location
Country	United States
Territory	Counties of Alameda and Contra Costa
Ecclesiastical province	Archdiocese of San Francisco
Statistics
Area	1,467 sq mi (3,800 km2)
Population - Catholics	550,000[1]
Parishes	84
Schools	54
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	January 13, 1962
Cathedral	The Cathedral of Christ the Light
Patron saint	Mary, Queen of the World, Francis de Sales
Current leadership
Pope	Francis
Bishop	Michael C. Barber
Metropolitan Archbishop	Salvatore J. Cordileone
Vicar General	George Mockel
Bishops emeritus	John S. Cummins
Map
Website
oakdiocese.org

The Diocese of Oakland (Latin: Diœcesis Quercopolitana) is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in the San Francisco Bay Area of California in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archbishop of San Francisco.

The Diocese of Oakland comprises Alameda and Contra Costa Counties. Its mother church is the Cathedral of Christ the Light in Oakland. Its patron saints are Mary, mother of Jesus and Francis de Sales.^[2]

The diocese filed for bankruptcy in May 2023 due to the cost of lawsuits by victims of child sex abuse by the diocese's clergy.