This article presents the 5-year outcome of family-based behavioral treatment of obesity for 6- to 12-year-old children in 162 families across 4 treatment outcome studies. Results suggest that treatments that use (a) conjoint targeting and reinforcement of child and parent behavior or (b) reciprocal targeting and reinforcement of children and parents are associated with the best child outcomes. Predictors of child success include self-monitoring, changing eating behavior, praise, and change in parent percent overweight. Parental outcome is predicted by self-monitoring weight, baseline parent percent overweight, and participation in fewer subsequent weight control programs.