The United States has 117 million households according to the latest U.S. Census Data. That would mean 1 percent of households represents 1.17 million households.
The New York Times published an interactive map based on University of Minnesota data that enables you to enter a household income and seeing where you would fall in 344 zones across the country.
While nationally, to be among the top 1 percent of earners you need a $400,000 household income, to be part of the “wealthy” in New York Metro you need $609,000 Household Income; to be in the 1 percent in Orange County, California you need $500,000, and yet in Flint, Michigan $250,000 gets you in the top 1 percent.
On the reverse, in Stamford, CT $250,000 merely puts you in the top 19 percent and even at $400,000 per year residents of the Manhattan suburb would only just make it into the top 10 percent.
See for yourself at The New York Times.
For marketers that buy national media, the numbers are worth thinking about, particularly when one considers the 2013 Ipsos Affluent Survey which studies only homes with a $100,000 + household income and covers 135 magazines found 0 publications with a Median Household Income even touching $250,000.