Here’s the map from the Social Science Research Council’s American Human Development Project.
The pattern is more or less what you would think. Catherine Rampell from Economix notes that:
Connecticut, which has the highest development of all American states, is roughly comparable with Ireland (the fifth most-developed country worldwide). But Mississippi has an H.D.I. level roughly on par with that of Turkey (#76 in the international development rankings).
MapScroll and Economix clear up any remaining confusion about an earlier, problematic map. Check out the project’s website and terrific interactive maps.