OBJECTIVES: Medications for opioid use disorder (MOUD) in the criminal justice setting is an effective way to address opioid use disorder and prevent associated deaths in the community. The Rhode Island Department of Corrections (RIDOC) is the first statewide correctional system in the United States to offer comprehensive MOUD services to incarcerated individuals.However, due to stigma, eligible individuals may be reluctant to engage with MOUD. This study aims to 1) evaluate the efficacy of an educational video intervention about MOUD and 2) characterize MOUD-related attitudes in a general incarcerated population. METHODS: Participants were recruited from eight elective classes offered to soon-to-be-released incarcerated individuals at RIDOC. Participants viewed an eight-minute video featuring incarcerated individuals speaking about their experiences using MOUD, designed to reduce MOUD-related stigma. Participants were administered surveys prior to and after watching the video to assess changes in MOUD knowledge (MOUD-K) and MOUD attitudes (MOUD-A). RESULTS: This evaluation of the intervention included 80 incarcerated participants (median age = 35, 93% male, 36% non-Hispanic White, and 26% non-Hispanic Black). Forty percent indicated non-medical opioid use within six months prior to incarceration; 13% had previously used MOUD. Significant improvements in MOUD-K scores (t(65) = -7.0, p < 0.0001) and MOUD-A scores (t(69) = -5.8, p < 0.0001) were detected after participants viewed the video. The intervention yielded greater ΔMOUD-A scores among those identifying as non-Hispanic Black, compared to non-Hispanic Whites (ß = 2.6, CI = 0.4, 4.8). CONCLUSION: The educational video improved both knowledge and positive attitudes towards MOUD, with changes in MOUD attitudes being influenced by race. These findings may inform future MOUD educational programs, thereby helping to reduce opioid use disorder-related morbidity and mortality.