This study examined expressed and received violence among men and women in substance abuse treatment. Rates of past-year partner violence (PV) did not differ by gender, although men reported markedly higher rates of nonpartner violence (NPV). Compared with PV, NPV was associated with more demographic and background factors (e.g., childhood aggression and conduct problems, family history of violence). The most consistent correlates of violence across relationship types were age, minority status, drug-related consequences, psychiatric distress, and frequency of childhood aggression. Only a few gender-specific correlates were identified; most notably, witnessing father-to-mother violence was related to received PV only for women. Identification of correlates of expressed and received violence in partner and nonpartner relationships is essential for the assessment and treatment of individuals in substance abuse treatment settings.