This report is the eleventh in a series that began in 2011. It describes BJS’s data collection and developmental activities during 2020 and 2021 and new statistical findings to measure the incidence and prevalence of rape and sexual assault in adult correctional and juvenile justice facilities, including through the National Survey of Youth in Custody, the National Inmate Survey, and the Survey of Sexual Victimization. Each of these collections is an independent effort, and they are not directly comparable. This report fulfills the mandate established by the Prison Rape Elimination Act of 2003 (PREA; P.L. 108-79) that requires BJS to produce a report, not later than June 30 of each year, on BJS’s activities to collect data on prison rape.