Despite the large body of literature investigating drug use, limited research has explored both the individual and structural dimensions of drug use, and an even smaller number of studies have focused on drug use in the Asian context. The current study draws on self-reported survey data on marijuana, methamphetamine, and opium use among offenders in South Korea. We apply four major theoretical perspectives to understand predictors of drug use in this context. Results demonstrate the link between methamphetamine use and unemployment and find strong predictability of social learning variables. Limitations and implications of the current study are discussed.