what county is san francisco ca in?
For other uses, see San Francisco (disambiguation). San Francisco (SF) (/sÃ¦n frÉnËsÉªskoÊ/, Spanish for Saint Francis; Spanish: [san fran.ËÎ¸is.ko]), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. It is the birthplace of the United Nations.