The purpose of this study is to examine profiles of students' attitudes toward citizenship norms and inclusiveness in the political process, focusing on changes in the frequency of particular profiles and in the strength of predictors across a decade. Using data from 16 countries participating in the 1999 and 2009 International Association for the Evaluation of Educational Achievement civic education studies, we identified five attitudinal profiles. Profiles defined by negative attitudes toward diverse social groups decreased over time, whereas profiles defined by very positive attitudes toward diverse groups increased, particularly in western Europe. Although some post-Communist countries demonstrated trends toward more positive attitudinal profiles, others trended toward profiles defined by weaker citizenship norms. Across countries and cohorts, more positive profiles were associated with stronger school climates and expectations of civic participation.