For those 30 cities as a whole, the median family makes around $64,000, according to data in the 2013 American Community Survey, which looks at households of two people or more who are related by blood or marriage. But in Detroit and Cleveland, the median family is making around $30,000, while in San Francisco and Seattle, the total is roughly $100,000. San Jose ranks at the very top; as Bui notes, 13 percent of families around San Jose (which includes the heart of Silicon Valley) have annual incomes of $250,000 or more.