This article examined parenting styles and prosocial behaviors as longitudinal predictors of academic outcomes in U.S. Mexican youth. Adolescents (N = 462; Wave 1 M[subscript age] = 10.4 years; 48.1% girls), parents, and teachers completed parenting, prosocial behavior, and academic outcome measures at 5th, 10th, and 12th grades. "Authoritative" parents were more likely to have youth who exhibited high levels of prosocial behaviors than those who were "moderately demanding" and "less involved." Fathers and mothers who were less involved and mothers who were "moderately demanding" were less likely than "authoritative" parents to have youth who exhibited high levels of prosocial behaviors. Prosocial behaviors were positively associated with academic outcomes. Discussion focuses on parenting, prosocial behaviors, and academic attitudes in understanding youth academic performance.