These are data collected by Kieran Healy.
Despite their large differences, all of the U.S. regions have higher average rates of death from assault than any of the 24 OECD countries we looked at previously. The placid Northeast comes relatively close to the upper end of the most violent countries in our OECD group.
Here is Healy’s chart showing that assault deaths in the United States are much higher than those of other OECD countries:
And here is Healy’s chart showing that the South is more violent, by far, than all other regions (although Healy does point out that some Western and Midwestern states have higher assault death rates than some Southern states).