- a seaport in W California, on San Francisco Bay: earthquake and fire 1906; United Nations Conference 1945.
- a port in W California, situated around the Golden Gate: developed rapidly during the California gold rush; a major commercial centre and one of the world’s finest harbours. Pop: 751 682 (2003 est)
city in California, U.S., named in Spanish for St. Francis of Assisi; the name first recorded in reference to this region 1590s, reinforced by long association of the area with the Franciscan order. A city in northern California.