<P> In October 2013, the incarceration rate of the United States of America was the highest in the world, at 716 per 100,000 of the national population . While the United States represents about 4.4 percent of the world's population, it houses around 22 percent of the world's prisoners . Corrections (which includes prisons, jails, probation, and parole) cost around $74 billion in 2007 according to the U.S. Bureau of Justice Statistics . </P> <P> In 2016, the Prison Policy Initiative estimated that in the United States that about 2,298,300 people were incarcerated out of a population of 323.1 million . This means that 0.71% of the population was behind bars . Of those who were incarcerated, about 1,351,000 people were in state prison, 646,000 in local jails, 211,000 in federal prisons, 34,000 in youth correctional facilities, 33,000 in immigration detention camps, 14,000 in territorial prisons, 5,500 in civil commitment, 2,400 in Indian country jails, and 1,400 in United States military prisons . </P>

What percent of the world's population is america