Using data from a national sample of two-parent families with 11- and 12-year-old youths (N = 591), we tested a structural model of family background, family process (marital conflict and parenting), youth self-control, and delinquency four years later. Consistent with the conceptual model, marital conflict and youth self-control are directly related to delinquent behavior, and parenting is linked with delinquency through its relationship with youth self-control. Males are at a greater risk of delinquency compared with females, a relationship that is explained by lower levels of self-control. Contrary to the hypothesized model, parenting practices and youth self-control do not mediate the relationship between marital conflict and delinquent behavior, and parenting practices and male gender have no direct relationship with delinquency. Implications for social work practice are discussed. (Contains 1 table and 2 figures.)