 The largest named ancestries in California are Mexican (25%), German (9%), Irish (7.7%), English (7.4%) and Italian(5.8%); there are 65 other ethnicities with sizable populations in California including Albanians, Australians, Canadians, Haitians, and Somalis as examples.Both Los Angeles and San Francisco have large numbers of residents with English, French, Italian, German, Russian and Scandinavian ancestry.California has the largest population of White Americans in the U.S., totaling 21,453,934 residents as of the 2010 census.