Based on Bourdieu's conceptualization of social capital (the social stratification perspective), this study examines the impact of social capital on the educational outcomes of young people in Sweden, with a focus on the extra-familial aspect of social capital -- that is, social capital generated by parental networks and active membership in various social organizations and friendship networks. The results indicate that the class background of respondents is the main predictor of access to all three forms of extra-familial social capital. However, after controlling for class background, the children of racialized immigrant groups are more likely to have access to more types of social capital than others. All three aspects of extra-familial social capital positively influence the educational performance of pupils.