This thematic issue covers the political participation of youth and immigrants in contemporary democracies. The articles in this issue advance knowledge in youth studies, migration studies, and political behavior, theoretically and empirically. They do so by proposing innovative perspectives on voter turnout, political efficacy, protest behavior, representation preferences, and intersectional dynamics among young and immigrant‐origin voters. Utilizing diverse methodological approaches, including quantitative analyses, qualitative interviews, and intersectional studies, the contributions highlight significant participation gaps and the factors that influence these disparities. The findings underscore the importance of addressing inequalities to strengthen democratic representation and stability.