Yesterday we saw a map of population density by county. Interesting, if of questionable utility.
Today we'll see something even more exciting. This is a map of household income
by county. The income numbers were derived from the 2002 Economic Census (conducted by the Census Bureau). Now, this map does not correct for cost of living (I can't find data on cost of living by county), but you can at least see where people make the most money. If you've ever wondered about things like that.