3. St. Louis, Missouri
St. Louis, Missouri has been considered in the last few years the most dangerous city in the United States, passing New Orleans, Detroit or Camden. The crime rate here is approximately 2,600 murders for every 100,000 citizens, even if there are only 350,000 residents in the entire urban area. Most crimes take place in the eastern part of the city, almost 65%, meaning there is no crime-free area in St. Louis.