LOS ANGELES, CA (Catholic Online) - These five counties that are within commuting distance of Washington, D.C., metropolitan area have median household incomes that are roughly double the national median of $50,502.

According to the U.S. Census Bureau's Small Area Income and Poverty Estimates, Loudoun County, Va., which lies to the north and west of the District of Columbia, topped the list in 2011, with a median family income of $119,525.

In second place was Fairfax County, Va., which had a median income of $105,000.

Howard County, Md., which is located between Washington and Baltimore, and includes the city of Columbia, Md., was fourth-highest at $99,000.

Arlington County, Va., which lies directly across the Potomac River from the District of Columbia, was fifth on the list, at $98,000.

Montgomery County, Md., which stands at the top of the diamond-shaped District of Columbia, fell to eighth on the list.

Four of the remaining top ten counties lie in the New York City metropolitan area.

In fact, only one county in the Top 10 lies outside of the Eastern Seaboard: Douglas County, Colorado, between Denver and Colorado Springs.

Here's the Top 10 Counties in the order of highest family median income.

1. Loudoun County, Va. - $119,525

2. Fairfax County, Va. - $105,000

3. Hunterdon, County, N.J. - $99,216

4. Howard County, Md. - $99,000

5. Arlington County, Va. - $98,000

6. Douglas County, Colo. - $95,973

7. Somerset County, N.J. - $95,915

8. Montgomery County, Md. - $92,288

9. Morris County N.J. - $91,420

10. Nassau County, N.Y. - $91,162