Los Angeles County. Home of The Hills, Rodeo Drive, and arguably the most exotic and high-end cars in the world. California has more billionaires than any other place on earth besides the rest of the United States. And we'd gamble that most of them live in SoCal. L.A. is also a place with a higher rate of working poor (7.5 percent) than the rest of the nation, a graduation rate (60 percent) that's also beat about by the national average (70 percent) and 1.4 million poor people.