This volume engages with the contested concept of ‘active citizenship’. It analyses the use and understanding of active citizenship in youth civic and political initiatives in the Czech Republic, Estonia, Germany, Italy, Portugal and the UK. Using ethnographic data and insights from the cross-European project CATCH-EyoU, the contributors to this collection illuminate the experiences of young people taking action for social change. It does so at a unique moment when a resurgent populist political right is deploying racial prejudice and neoliberal protectionism in both established media and new digital media to fuel xenophobic nationalism. The book asks a range of questions, including: What is life like for active young citizens with an interest in the civic and political spheres? What practices, relationships and motivations characterise their participatory movements, organisations, initiatives and groups? The chapters use case studies to analyse how friendship and emotion, social media, diversity-work, racism, precarity and burnout feed into motivating and developing or curtailing sustained pro-democratic activism. Youth Active Citizenship in Europe will be of interest to students and scholars across a range of disciplines including politics, sociology, education and cultural studies.