New Bureau of Justice Statistics Report: Time Served in State Prison, 2018
Date:  04-01-2021

Two-thirds of people released from state prison in2018 served less than two years
From the BJS:

Two-thirds of offenders released from state prison in 2018 served less than 2 years in prison before their initial release. While 1 in 23 violent offenders (4%) served 20 years or more before their initial release, over half of violent offenders (57%) were released in less than 3 years.

The average time served by state prisoners released in 2018, from their date of initial admission to their date of initial release, was 2.7 years. The median amount of time served (the middle value in the range of time served, with 50% of offenders serving more and 50% serving less) was 1.3 years (figure 1). By offense type, the median time served was 17.5 years for murder, 7.2 years for rape, 17 months for drug trafficking, and 9 months for drug possession.

These findings are based on prisoner records from the National Corrections Reporting Program (NCRP), which collects records on prison admissions and releases. All statistics in this report are based on state prisoners’ first release after serving time for a given offense. Read the full report here.