According to a recent article published by the Seattle Times, "nearly 4 percent of Seattle's millennial households earn more than $350,000 per year, a concentration that puts it in the top five cities in the U.S. "What's causing the income spike in the Emerald City? Zillow, who conducted the report, "attributes Seattle's high share of loaded youngsters to the city's tech-job boom and says the well-off whelps have helped create a bonkers housing market." 

As the article notes, "a high salary goes much further toward housing here than in the other cities that made the list" such as San Francisco, California; Arlington, Virginia; and Huntington Beach, California where home prices are substantially higher and residents are responsible for paying state income tax.