The Brookings Institute has put together a website with interactive data maps of metropolitan America. The data comes from the 2009 American Community Survey (done by the Census) and one can look at all sorts of variables across cities or metropolitan areas.

The best feature, in my opinion, is the tab that lets you compare suburbs alone across metropolitan regions. Very quickly, you can find that the suburbs of Syracuse, New York have the highest percentage of non-Hispanic whites (93.1%), the suburbs of San Jose-Sunnyvale-Santa Clara, California, have the highest median household income ($96,478), and the suburbs of Modesto, California have the highest percentage of commuters traveling more than 90 minutes to work (7.2%).