OBJECTIVE:To examine the relationship between mindfulness and alcohol problems in college students, as well as the role of stress as a mediator in this relationship. PARTICIPANTS: Participants were 310 students from a small, private college in the Northeast. METHODS: Students completed self-report measures, including the Perceived Stress Scale, the Five Facet Mindfulness Questionnaire, and the Rutgers Alcohol Problems Index. RESULTS: Mindfulness was negatively correlated with alcohol problems and stress, whereas stress positively correlated with alcohol problems. Results implicated stress as fully mediating the relationship between mindfulness and alcohol problems. Alcohol problems were negatively correlated with the Acting With Awareness and Describing Experience facets of mindfulness. CONCLUSION: Mindfulness-based stress reduction or other mindfulness programs may be useful in decreasing alcohol problems on college campuses via the effects on stress.