Finally there are signs of trouble in high-end real estate markets like Greenwich, Conn.

But until now Greenwich and other bastions of the American Rich have been sheltered from the worst of the housing crisis. And the worst of the unemployment crisis.

This list features the most exclusive neighborhoods in America, according to Stephen Higley's Elite 100, which is based on the American Community Survey 2005-2009. In these neighborhoods the mean incomes range from $389,000 to $586,000.