Higley compiled his list using data from the 2006-2010 American Community Survey, identifying contiguous block groups (a subdivision of census tracts) with a mean household income of $200,000 or more. (Note that it is possible that these mean household incomes are in fact underestimates, as households can only claim up to about $2 million in income on the American Community Survey.
America’s 1,000 richest neighborhoods are home to two million Americans, a group that makes up just 0.6 percent of the country’s population. The top 63 wealthiest neighborhoods have mean household incomes of $390,000 or above, making their average resident automatically a member of the country’s one percent. At the very top, 18 of these neighborhoods have mean household incomes above $500,000.Here's the list of the top ten richest neighborhoods in the country.:
You can see that only one (East Lake Shore Drive in Chicago) is not on the east or west coast. You can also see that a disproportionate share of these (4 of 10) are in the general vicinity of Washington, DC. It seems to pay off to hang around the federal government.