Rates of Adult Incarceration and Community Supervision in the US, 2015

"After peaking at 3,210 offenders per 100,000 U.S. adult residents in 2007, the correctional supervision rate trended downward, falling to a low of 2,710 per 100,000 by yearend 2015 (table 4). The drop in the correctional supervision rate was attributed equally to the decline in the U.S. correctional population and the increase in the U.S. adult resident population. By yearend 2015, the correctional supervision rate fell to the lowest rate since 1994 (2,650 per 100,000), when about 1.6 million fewer persons were supervised by U.S. adult correctional systems (not shown).
"There were 1,870 offenders per 100,000 U.S. adult residents on either probation or parole at yearend 2015. This represented the lowest rate of offenders under community supervision since 1993 (1,830 per 100,000), when the population was smaller by about 1.1 million offenders (not shown). The community supervision rate reached a high in 2007 (2,240 per 100,000) before declining each year through 2015.
"At yearend 2015, 870 persons per 100,000 U.S. adult residents were under the jurisdiction of state or federal prisons or in the custody of local jails. The incarceration rate has been declining since 2009 (980 per 100,000). By yearend 2015, the incarceration rate dropped to the same rate as 1997 (870 per 100,000)."


Danielle Kaeble and Lauren Glaze, "Correctional Populations in the United States, 2015," (Washington, DC: US Dept. of Justice Bureau of Justice Statistics, December 2016), NCJ250374, p. 4.