The epidemic of opioid overdose brought a major health crisis to the front line of public health in the United States. Early efforts have focused on the prevention of production, distribution, and consumption of the drugs. However, there is little information about youth populations at risk for opioid overdose and their response to targeted treatment plans. The San Bernardino County Youth Opioid Response (SBCYOR) coalition in collaboration with the San Bernadino County (SBC) Probation Department organized a safety net system for at-risk youth by improving communication among county resources. This program mainly focused on individuals aged 12 to 24 years in the county's detention centers along with educational and prevention projects such as naloxone programs for first responders in the region. To describe the impact of the SBCYOR program on at-risk youth, we compare the frequencies of patients referred and treated with medications for opioid use disorder (MOUD) at the SBC Probation Department, which was responsible for individuals from age 12 to less than 18 years, with those from the West Valley Detention Center (WVDC), which was responsible for adults (18 to 24 years of age), from September 2020 through June 2022. Similar proportions of youths were referred for treatment of opioid use disorder (OUD) at the respective sites (3.7% SBC Probation Department, 3.6% WVDC). Of these, however, 78.0% were treated with MOUD at SBC Probation Department compared with only 7.1% at WVDC. SBCYOR coalition partners were able to transform their services into a comprehensive medical and behavioral health program for the incarcerated youth population at risk for OUD.