A Yahoo Real Estate report using the most recent Census Bureau data from 2010, looks at U.S. counties with the highest median household income and found four of the top five richest counties in America are clustered around Washington, DC.
U.S. median household income declined 2.3% from 2009 to 2010 and currently averages $49,445. Washington area counties exceeded the $100,000 mark.
- Loudoun, VA - $119,540
- Fairfax, VA - $103,010
- Howard County, MD - $101,771
- Arlington, VA - $94,985