Tested the role of self-esteem as a mediator of relationships between socio-environmental experiences and emotional/behavioral problems using a sample of 215 young adolescents (Grades 7-9). Socioenvironmental experiences were assessed using self-report questionnaire measures of social support and major and minor stressful events. Self-esteem was assessed using a self-report questionnaire, an interview, and a parent-report questionnaire. Emotional/behavioral problems were assessed using self-report, parent-report and teacher-report questionnaires. Utilizing structural equation modeling, the data were used to test a model in which self-esteem mediated the relationship between socioenvironmental experiences and emotional/behavioral problems. The hypothesized model provided a reasonably good fit to the data (normed fit index = .90). However, an alternative model which also allowed for direct effects of socioenvironmental experiences on emotional/behavioral problems produced a significant improvement in model fit. In this model, socio-environmental experiences had significant effects on emotional problems via both direct effects and indirect effects that indicated a mediating role of self-esteem. Only direct effects of socioenvironmental experiences were evident for behavioral problems.