Football, a sport that has been bringing together millions of people over the years, is considered the most popular sport in the world. An indispensable part of this sport are its "12th players" – the fans. They cheer for their club, rejoice in its successes, and invest their time, energy, and money to support it. However, it is hard not to mention that football fan riots have become almost an unavoidable part of the football matches and a global social problem with numerous negative consequences and costs. It is unquestionable that not all fans participate in football riots and conflicts. Therefore, it is necessary to identify the characteristics of individuals and the psychosocial variables associated with certain people's readiness to join riots and conflicts at football gatherings. The aim of the research was to examine the influence of various individual characteristics and psychosocial variables on fans' involvement in football riots, as well as to examine the frequency of fan involvement in football riots in the Republic of Croatia. The study involved 863 participants, 659 men and 204 women. They completed a series of online questionnaires, which included sociodemographic data, information on fan experience, alcohol and drug consumption, participation in football riots, as well as The Aggression Questionnaire (Buss and Perry, 1992) and an adapted Pictorial item of identity fusion (Swann et al., 2009). According to the results, 64.1% of the surveyed fans participate in football riots, and significant predictors of involvement in football riots were shown to be gender, age, level of education, aggressiveness, alcohol consumption, drug consumption, identity fusion, official club membership, and membership in a fan group. The findings of this research contribute to the understanding of predictors of fan involvement in football riots and can be used in the development of preventive measures and strategies to reduce incidents at stadiums.