Washington state: 13th-highest median income at $56K

With a median average income of $56,835, Washington state ranks No. 13 nationally, trailing U.S. leader Maryland at $70,004.
Washington state had 249,382 households, or 9.47 percent of all households that made $150,000 or more last year, which ranked the state 15th nationally. The District of Columbia, which is considered a state for statistical purposes, led the country with nearly one-fifth of the households in the district (18.0 percent) with 2011 incomes of $150,000 or more.
The six states with the strongest concentrations of top-end incomes are arrayed along the Atlantic from Massachusetts to Virginia, according to research by On Numbers, the research division of American City Business Journals.
A total of 10.02 million U.S. households crossed the $150,000 threshold in 2011, accounting for 8.7 percent of the nation’s 114.99 million households.