The Jail System
Oklahoma has 77 counties. According to surveys completed in 2013, there are 88 jail and adult detention facilities, with a population of 12,670 inmates.
The Prison System
As of December 31, 2015, the Oklahoma prison population was 28,547. The Oklahoma DOC actual expenditures for FY2015 were $515 million with a staff of 3,852.
The Community Corrections System
As of December 31, 2015, Oklahoma had 31,281 probationers and 2,116 parolees.