Which city is America's 'richest'?

Silicon Valley has been dethroned as the seat of America's wealthiest.  All hail... Washington, D.C.:

Federal employees whose compensation averages more than $126,000 and the nation’s greatest concentration of lawyers helped Washington edge out San Jose as the wealthiest U.S. metropolitan area, government data show.

The U.S. capital has swapped top spots with Silicon Valley, according to recent Census Bureau figures, with the typical household in the Washington metro area earning $84,523 last year. The national median income for 2010 was $50,046. ...

Total compensation for federal workers, including health care and other benefits, last year averaged $126,369, compared with $122,697 in 2009, according to Bloomberg News calculations of Commerce Department data. There were 170,467 federal employees in the District of Columbia as of June. The Washington area includes the District of Columbia, parts of Northern Virginia, eastern Maryland and eastern West Virginia.

On a related note, Harry Reid says its these high-paying public sector jobs which should take priority over private sector ones:

Senate Majority Leader Harry Reid (D-Nev.) on Wednesday said Congress needs to worry about government jobs more than private sector jobs, and that this is why Senate Democrats are pushing a bill aimed at shoring up teachers and first responders.

"It's very clear that private sector jobs have been doing just fine, it's the public sector jobs where we've lost huge numbers, and that's what this legislation [part of Obama's jobs plan] is all about," Reid said on the Senate floor.