The majority of men and women prison inmates are parents. Many lived with children prior to incarceration, and most have at least some contact with their children and families while serving their sentences. As prison populations have increased in the United States, there has been a renewed interest in finding ways not only to reduce recidivism, but also to prevent incarceration in the first place, particularly amongst the children of incarcerated parents. A predictor of both recidivism and criminal justice involvement is supportive family interaction. The ongoing development of a multi-component parenting intervention for adults involved in the criminal justice system is described that attempts to impact two key systems, the family system and the social service system. The intervention currently includes a prison-based parent management training program called Parenting Inside Out (PIO); a prison-based therapeutic visitation program; and complimentary versions of PIO designed for jail and probation and parole settings. Work on components specifically designed for children and for caregivers during reunification from prison is ongoing. Program development has occurred within the context of strong support from the state department of corrections, as well as from governmental and private sector groups.