The impact of involvement in high school athletics and nonsport extracurricular activities on political engagement among young Black adults was examined. We developed a conceptual model to identify school engagement factors and assess their influence on political participation (i.e., voter registration and voting behavior) of Blacks in early adulthood. Using data from the National Educational Longitudinal Study of 1988 (NELS:88), bivariate and multivariate (logistic regression) analyses revealed that participation in varsity individual sports and participation in nonsport extracurricular activities have significant net effects on political participation. Furthermore, the effects of participation in these school engagement activities are mediated by educational attainment. However, the effect of participation in varsity team sports on political participation is not significant. While our study confirmed the importance of participation in school engaging extracurricular activities, both sport and nonsport, in shaping political engagement of Blacks in early adulthood, the model was only partially confirmed. Limitations and implications of these findings for future research are discussed. (Contains 3 tables and 1 figure.)