The study predicted that community adversity (ethnic diversity), controlling for community poverty, and family adversity (family poverty and single parenthood) would influence adolescent delinquency additively and multiplicatively through family social resources and through individual/control factors. An effective analysis of community influence on individual outcomes requires a multilevel analysis that includes community level, family level, and individual level variables. This quantitative research used data samples from the National Longitudinal Study of Adolescent Health, Wave 1 (1995), and the 1999 U.S. Census. The findings demonstrate that there is (a) a unique influence of ethnic diversity on adolescent delinquency, independent of community poverty and family adversity; (b) an indirect influence of ethnic diversity on adolescent delinquency through family social resources; (c) a moderation of detrimental influence of minority status under highly diverse community environments and dissipation of the beneficial influences of family social resources under highly diverse community environments.