Research examining the influence of social relationships on child outcomes has seldom examined how individuals derive social capital from more than one context and the extent to which they may benefit from the capital derived from each. We address this deficit through a study of child behavior problems. We hypothesize that children derive social capital from both their families and their schools and that capital from each context is influential in promoting social adjustment. Using a large national data set and structural equation modeling, we find that social capital at home and at school can be measured as separate constructs and that capital at home is more influential than is capital at school. We discuss the implications of these findings for future research on social capital and for practical interventions promoting social adjustment. (Contains 2 tables, 2 figures, and 4 notes.)