All the countries in Southern Africa – 373 (2004), 320 (2010)
All the countries in East Africa – 208 (2004), 230 (2010)
All the countries in Central America - 293 (2004), 250 (2010)
All the countries in West and Central Europe - 15 (2004), 12 (2010)
[Example of a particularly nice European country: France - 8 (2006)]
Data by US State came from an anti-death penalty site:
New Hampshire – 10 (2010), 8 (2009)
North Dakota – 15 (2010), 19 (2009)
West Virginia – 33 (2010), 46 (2009)
California – 49 (2010), 53 (2009)
Louisiana – 112 (2010), 118 (2009)
USA nationwide - 48 (2010)
So while the American totals are dramatically worse than West/Central Europe, it's impressive how much it varies from state to state. Almost looks like it varies with IQ, doesn't it?
Of course psychometrics enthusiasts wouldn't find that too surprising, but neither would race realists find it too surprising if it was correlated with race. The above data make it look like states that are racially equivalent to Europe are approximately as dangerous as Europe, with respect to murder/homicide. Since there are no US states with as a high a percentage of blacks as most African countries, we shouldn't be surprised that there are no states topping 200 murders per million inhabitants (and indeed only Louisiana tops 100, but of course DC is at about 234).
More direct data, from victimization reports, indicates quite the same thing (though as Queen Latifah proved recently, noöne will call you out if you ignore victimization data and concentrated on arrest data, which are allegedly tainted by racism).
HBD Chick recommended I do a post on this, so I decided to do a little research and put 2010 data on homicides by state together with data from the census of the same year on race and ethnicity by state. I used the state-by-state homicide data from the above site, while I found data on race and ethnicity at this US Census Bureau page.