Young adults may be a vulnerable group for developing problem gambling. However, it is still unknown what prevention programs work for them because much of the research has focused on children and adolescents. This systematic review provides a summary of existing literature on prevention programs for young adults in the last 20 years. Only nine studies were found to be relevant and included in the review. All studies targeted university or college students. Most studies used a Personalized Normative Feedback approach, which produced good results in reducing problem gambling behaviours.