San Jose–San Francisco–Oakland, CA Combined Statistical Area 2017 the San Jose–San Francisco–Oakland CSA had a GDP of $878 billion, which would rank 17th among countries and 5th among states. Among Combined Statistical Areas, the Bay Area is 5th in terms of population, but 3rd in terms of GDP. Silicon Valley, the leading high technology region in the world, is located in Santa Clara County. Major corporations in San Francisco, San Jose, Oakland, and the surrounding cities help make the region second in the nation in concentration of Fortune 500 companies, after New York. The Bay Area's northern counties encompass California's famous Wine Country, home to hundreds of
San Gabriel Valley the San Gabriel Valley according to the 2000 Census was 3.28 persons compared with 2.98 persons for Los Angeles County as a whole. Eight cities in the Valley have average household sizes of over 4 persons, while an unincorporated area, the South San Jose Hills, was at a significant 5.07 persons per household. (Most addresses do not use South San Jose Hills as the city but use La Puente, West Covina, or Valinda.) At the other end of this scale is Sierra Madre, at 2.20 persons per household. The age distribution in the San Gabriel Valley was a little unusual