In 2014, the most recent year that a county level breakdown is available, 54% of counties (with 11% of the population) have no murders. 69% of counties have no more than one murder, and about 20% of the population. These counties account for only 4% of all murders in the country.See what I've been telling you about high population density? Murder is only the most horrific outcome, it's by no means the only negative result.
The worst 1% of counties have 19% of the population and 37% of the murders. The worst 5% of counties contain 47% of the population and account for 68% of murders. As shown in figure 2, over half of murders occurred in only 2% of counties.
In excess of three-quarters of U.S. counties had 2 or fewer murders in 2014. The maps that accompany this article are worth a bit of study, although it's safe to say you won't be surprised at what you learn therefrom. The people committing most of the murders regularly vote Democrat. Coincidence?