25 highest-income counties by median household income (2006-8)
Rank↓ County↓ Median Household Income↓ Population↓ Educational Attainment*↓
1 Loudoun County, Virginia $110,643 277,433 58%
2 Fairfax County, Virginia $106,785 1,005,980 60%
3 Howard County, Maryland $101,710 272,412 60%
4 Hunterdon County, New Jersey $100,947 129,000 52%
5 Somerset County, New Jersey $100,207 321,589 53%
6 City of Fairfax, Virginia $98,133 23,281 52%
7 Morris County, New Jersey $97,565 486,459 52%
8 Douglas County, Colorado $97,480 270,286 54%
9 Arlington County, Virginia $96,390 204,889 71%
10 Montgomery County, Maryland $93,999 942,747 59%