Many adolescents living in contexts characterized by adversity achieve positive outcomes. We adopt a protection-risk conceptual framework to examine resilience (academic achievement, civic participation, and avoidance of risk behaviors) among 1,722 never-married 12-19 year olds living in two Kenyan urban slums. We find stronger associations between explanatory factors and resilience among older (15-19 years) than younger (12-14 years) adolescents. Models for prosocial behavior and models for antisocial behavior emerge as key predictors of resilience. Further accumulation of evidence on risk and protective factors is needed to inform interventions to promote positive outcomes among youth situated in an ecology of adversity. (Contains 1 figure and 4 tables.)