Fairfax County Second on List of Wealthiest in U.S.

Fairfax County is second on Main Street's annual list of the 15 wealthiest counties in America.

Loudoun County leads the list, on which 10 of the top 15 are located in D.C. metropolitan area.

Rankings were based on 2010 U.S. Census data.

Fairfax County has a median household income of $103,000.  It's also noted for real estate values, with a median home value of $507,800. 

Fairfax has an unemployment rate of about 4 percent, compared with 8.3 percent nationwide.

Main Street's 15 richest counties all have a median income about double the national average of $49,445.  They are:

1. Loudoun County, VA - Median Household Income: $119,540
2. Fairfax County, VA - Median Household Income: $103,010
3. Howard County, MD - Median Household Income: $101,771
4. Hunterdon County, NJ - Median Household Income: $97,874
5. Arlington County, VA - Median Household Income: $94,986
6. Douglas County, CO - Median Household Income: $94,909
7. Stafford County, VA - Median Household Income: $94,317
8. Somerset County, NJ - Median Household Income: $94,270
9. Prince William County, VA - Median Household Income: $92,655
10. Morris County, NJ - Median Household Income: $91,469
11. Nassau County, NY - Median Household Income: $91,104
12. Montgomery County, MD - Median Household Income: $89,155
13. Calvert County, MD - Median Household Income: $88,862
14. St. Mary's County, MD - Median Household Income: $88,444
15. Charles County, MD - Median Household Income: $87,007