The easiest answer is here without my having to dredge through data from multiple sources, including census.
http://www.politifact.com/truth-o-m...e-97-nations-100-poorest-counties-red-states/
"Our bigger question concerns whether it’s significant that a lot of poor counties are located in red states. There’s reason for at least a bit of skepticism.
For starters, the list is dominated by rural areas. Generally speaking, rural areas have a lower cost of living, so the small income you make in a poor, rural Texas county is going to go further than it would if you lived in a poor, urban area like Detroit or Camden, N.J. This raises questions about how comparatively disadvantaged poor Americans are in rural and urban areas.
Also, rural areas are areas where Republicans tend to do well electorally. By contrast, impoverished areas of big cities are big enough population-wise to be balanced by more affluent neighborhoods, and these poor urban areas are often (though not always) in blue states.
It’s also worth pointing out that many of the counties on the list are located in Appalachia, particularly in such states as Kentucky, West Virginia, Mississippi and Georgia. That’s a region that has suffered economically for generations -- long predating the time when Republicans took over from Democrats in most elected offices.
In Appalachia, "it’s clear there’s a regional problem, born of isolation, geographic and political; exploitation, of timber and coal; and poor education," said Al Cross, director of the Institute for Rural Journalism and Community Issues at the University of Kentucky.
Finally, there’s an eccentricity that shaped both of the top-100 lists. Each is dominated by three states: Texas, Georgia and Kentucky. What ties together these three states? They have a lot of counties. In fact, these three states rank first, second and third on the list of states that have the most counties. Texas has 254, Georgia 159 and Kentucky 120.
This means that these three states have lots of rural, small-population counties, so they take up a disproportionate share of the spots on these lists. On each list, these three states collectively account for more than 40 percent of the counties listed.
Importantly, each of these three states are red states. If some of the bigger blue states had been sliced into as many counties as Texas, Georgia and Kentucky were, some of those blue-state counties might have been poor and rural, and that could have changed the complexion of the list. As it is, blue states tend to have smaller numbers of counties. New York has 62, California has 57, Washington state has 39, Oregon has 36, New Jersey has 21 and Massachusetts has just 14."
exactly as I suspected... not adjusted for cost of living.
