This Seminar will provide the Committee on Law and Justice (CLAJ), invited guests, and others with a forum to explore and discuss psychiatric disorders in incarcerated populations and challenges for correctional facilities and the public health system. Mental health and substance use disorders are common in youth and adults in correctional facilities. Services are insufficient. After release, there are many barriers to linkage to services in the community. We will hear from researchers and practitioners about: (1) services needs and service utilization during incarceration – in jails, prisons and juvenile detention centers; and (2) linkage to community services after release. The objective of the seminar is to address how we might improve the systems that provide care.