The Roman Catholic Diocese of Santa Rosa in California (Latin: Dioecesis Sanctae Rosae in California) is an ecclesiastical territory or diocese of the Roman Catholic Church in the northern California region of the United States named in honor of St. Rose of Lima. It comprises the Counties of Del Norte Humboldt Lake Mendocino Napa and Sonoma.
California, County (United States), Humboldt County California, Lake County California, Mendocino County California, Napa County California, Sonoma County California
