Objectives: This study examined the factors associated with suicide risk among out-of-school youths (OSY) by analyzing their medical records retrospectively. Methods: The medical records of 280 OSYs who were admitted to the National Medical Center from January 2015 to December 2018 were examined. The demographic and clinical records, including behavioral problems, post-traumatic symptoms, harmful alcohol consumption, family functioning, and quality of life, were analyzed. Results: Among the 280 subjects, 80 (28.6%) were considered a high-risk suicidal group. The number of post-traumatic symptoms was found to be positively correlated, and the family functioning scores were negatively correlated with the increasing risk of suicide in the OSY based on the multiple regression analysis of the medical records. Conclusion The result of this study provides inputs for suicide prevention programs targeted at OSYs by identifying the risk and protective factors associated with suicide among the group.