The Jewish population in California as a whole is approximately 2.9 percent but they may make up Jews make up about 6 percent of the City of Los Angeles’ population. The population density will vary by neighborhood. Fairfax used to be the most Orthodox and Jewish neighborhood.
I believe Palm Beach County Florida has the largest Jewish population per capita in the nation, something like 38% according to the last census.
Maybe I was unclear. I meant in the Hollywood film industry.