A Crime Prevention Research Center study looking at county-by-county data for 2014 shows that two percent of counties in the U.S. account for 51% of U.S. murders.
The study shows that “54% of counties (with 11% of the population) have no murders” while “69% of counties have no more than one murder.” Taken together these counties, which represent about 31% of the U.S. population, “account for only 4% of all murders in the country.”