This study examines the effects of general educational quality of schools, school citizenship policy, and ethnic homogeneity of the student body on the acquisition of citizenship competences in the final year of primary education. The theoretical framework is based on developmental, psychological, and sociological studies into effects of social context on educational outcomes and research into effective schools. The effects of school quality, school policy, and student population were analysed using 2-level (students, school) multilevel models. The results show that differences in citizenship competences between students and schools are mainly explained by factors at student level. Although the school also appeared to play a role, the school variables used in the analysis did not offer sufficient explanation for these differences. In order to further investigate the relationship between school factors and students' citizenship, more insight is needed into characteristics of citizenship practices of schools.