This dataset contains survey data and analysis code for the article “Belonging to a community of European fans? European common in-group identity formation through football fandom,” submitted to Humanities and Social Sciences Communications. Collected within the FANZinE project, the data examine football fandom as a social arena for identity formation, social cohesion, democratic engagement, and the development of a shared European fan identity. Files include survey datasets in multiple formats, codebooks, and an R analysis script.