Using a study cohort of 527,081 individuals serving either a term of probation or a term of supervised release (TSR), and excluding those who were deported, whose supervision terms began and ended on the same day, who had pending charges, and who otherwise were unavailable for supervision, the author examines criminal recidivism of persons under supervision for terms up to 60 months, as well as up to three years for individuals who have completed a term of supervision.