Recent reforms significantly altered the role of probation in California. In 2011, the state enacted public safety realignment, which shifted the management of lower-level felons from state prison and parole to county jail and probation. As part of this effort, realignment tasked probation departments with the supervision of certain offenders who were previously the responsibility of state parole agencies. These and other policy changes have placed considerable demands on local corrections systems. This report uses newly available data to describe the changing characteristics of individuals under probation supervision in California.