Claim: Silicon Valley is in a populous region and is cultured.
Evidence: Silicon Valley is a nickname for the southern portion of the San Francisco Bay Area , in the northern part of the U.S. state of California.
The Greater Los Angeles Area and the San Francisco Bay Area are the nation 's second - and fifth-most populous urban regions , respectively.
San Francisco -LRB- initials SF -RRB- -LRB- -LSB- sæn_frənˈsɪskoʊ -RSB- , Spanish for Saint Francis ; Spanish : -LSB- san franˈsisko -RSB- -RRB- , officially the City and County of San Francisco , is the cultural , commercial , and financial center of Northern California.