The Archdiocese of San Francisco is a Roman Catholic archdiocese located in California, serving the spiritual needs of Catholics in the region. Established in 1850, it encompasses San Francisco, Marin, and San Mateo counties. The archdiocese is part of the larger Catholic Church and is led by an archbishop, currently Salvatore J. Cordileone. The archdiocese oversees numerous parishes, schools, and charitable organizations, promoting education and social services. It plays a significant role in the community, addressing various issues such as poverty, immigration, and family support, while fostering a sense of faith and belonging among its members.