Mentally ill offenders possess a unique set of circumstances and needs. However, all too often, they cycle through the criminal justice system without appropriate care to address their mental health. Their recurring involvement in the criminal justice system is a pressing concern. This report provides a national landscape on the processing and treatment of mentally ill individuals in the criminal justice system. It also highlights challenges involved in the reintegration of mentally ill offenders into society, the diversity of policies and protocols in state statutes to address such challenges, and promising criminal justice interventions for mentally ill offenders.