3. Hillsborough, California (Average Household Income: $430,681)

With beautiful open space for wildlife to the west and the San Francisco Bay to the east, Hillsborough is a prime place to call home. It’s also home to the Flintstone House, which is an odd sight to see from the freeway.

Just north of Silicon Valley in the Bay Area, Hillsborough is home to some of the tech world’s wealthiest entrepreneurs, along with some of America’s top stars. Celebrities like Jimmy Kimmel and Alicia Silverstone call it home.