America's Richest Counties

While Loudoun ranks at the top, it’s far from alone on the list of wealthiest counties that surround Washington. In fact, it’s just the beginning. The neighboring counties of Falls Church City, Fairfax, Arlington and Prince William in Virginia and Howard County in Maryland all make the cut, giving the D.C. area six of the nation’s ten wealthiest counties. All boast median household incomes between $93,000 and $117,000 annually.