Presents data on adult offenders under community supervision while on probation or parole during 2011. The report describes trends in the overall community supervision population and analyzes changes in the probation and parole populations. It provides statistics on the number of offenders entering and exiting probation and parole and their average length of stay. The report describes the outcomes of supervision, including the rate at which offenders completed their term of supervision or were returned to prison or jail for violating the conditions of supervision. Appendix tables include jurisdiction-level data on entries and exits and describe the national-level prevalence of offenders on probation or parole by sex, race, Hispanic origin, offense type, and supervision status