California demographics less than 40 percent which were expected to exceed according to Pew Research Hispanics make up Pew Research Center California demographics more diverse by the day *Pew Research Center 40 percent 11.6 percent Jerry Brown, gobernador de California predictions California's Governor Jerry Brown largest ethnic group according to Pew Research ethnic group in 2014 According to Pew Research Pew Research Center 11.6% of the population is black 11.6 percent Pew Research poll California identified