The Diocese of Oakland is a Roman Catholic diocese located in California, serving the counties of Alameda and Contra Costa. Established in 1962, it is part of the larger ecclesiastical province of San Francisco. The diocese is responsible for overseeing local parishes, schools, and various ministries within its jurisdiction. The diocese is led by a bishop, who provides spiritual guidance and administrative oversight. It focuses on promoting the teachings of the Catholic Church, fostering community engagement, and supporting social justice initiatives. The Diocese of Oakland also emphasizes education through its network of Catholic schools.