JCOIN’s vision is that “every justice-involved individual with a substance use disorder should have timely access to evidence-based practices and treatment(s), whether the individual is detained or residing in the community.” JCOIN is a research-to-practice initiative funded by the National Institute on Drug Abuse (NIDA) to achieve these aims. JCOIN investigators collaborate with justice and behavioral-health partners to study and disseminate evidence-informed approaches to deliver opioid treatment services to individuals involved in the justice system. This website is maintained by JCOIN’s Coordination and Translation Center. It includes the latest research findings from the JCOIN studies, along with courses, webinars, funding opportunities, training programs, and other free resources of interest to justice and treatment stakeholders.