In a previous post, if DC were a state, it would rank as having the highest per capita income. What about if it were ranked on median income. The data for 2010 is not available, nor is the data available for personal income. The following for 2008 is for personal per capita income and median household income, courtesy of the 2011 Statistical Abstract.
11 states are ranked higher than DC in household median income, but DC is still highest in terms of per capita income.