correctional population

Estimated rate of persons supervised by US adult correctional systems, by correctional status, 2000 and 2005–2015

In 2015, the US adult correctional system had under its supervision one in every 37 US adults, which is a rate of 2,710 people under supervision per 100,000 US residents aged 18 or older. More broadly, that's a rate of 2,090 per 100,000 US residents of all ages.
The rate for the population on community supervision, i.e. probation and parole, in 2015 was 1,870 per 100,000 US residents aged 18 or older, and 1,440 per 100,000 US residents of all ages.

Total Number of Adults Supervised by the US Correctional System, 2000, 2005, and 2010-2015

Total Number of Adults Supervised by the US Correctional System, 2000, 2005, and 2010-2015: In 2015, a total of 6,741,400 adults were under the supervision of the US adult correctional system. Of those, 4,650,900 were under community supervision, of which 3,789,800 were on probation and 870,500 were on parole. A total of 2,173,800 adults were incarcerated in 2015, of whom 728,800 were in jails and 1,526,800 were in prisons.

Number of Adults Under Correctional Supervision in the US

"The decline in the U.S. correctional population from January 1, 2016 (6,676,200 persons), to December 31, 2016 (6,613,500), continued a downward trend that began in 2008 (table 1). Persons supervised in the community on either probation (3,673,100 persons) or parole (874,800) continued to account for the majority of the U.S. correctional population at year-end 2016. Nearly 7 in 10 persons under correctional supervision were supervised in the community (4,537,100) on December 31, 2016, and 3 in 10 (2,162,400) were incarcerated in state or federal prisons or local jails.1