2. Ciudad Juárez, Mexico
Ciudad Juárez, the most populated city in the state of Chihuahua, Mexico has over 1.5 million residents and is part of the largest border metropolis, called El Paso Del Norte, along El Paso and Sunland Park (U.S). The crime rate here exceeds 2,900 murders per 100,000 inhabitants and it continues to stay at this level despite military efforts.