9. Sunnyvale, Calif.
Another city in the Silicon Valley region, Sunnyvale combines a comprehensive and thriving business plan with 772 acres of parkland, according to the city’s website. The city's median household income is $156,059, and just under 68% of its residents have household incomes higher than $100,000, according to the census. It is the second-largest city in Santa Clara County, with a population of 155,805, according to census data.