To identify food patterns and eating behaviors among adolescents and to describe the prevalence rates, this study applied the Grade of Membership method to data from a survey on health risk factors among adolescent students in Rio de Janeiro, Brazil (N = 1,632). The four profiles generated were: "A" (12.1%) more frequent consumption of all foods labeled as healthy, less frequent consumption of unhealthy foods, and healthy eating behaviors; "B" (45.8%) breakfast and three meals a day as a habit, less frequent consumption of fruits and vegetables and of five markers of unhealthy diet; "C" (22.8%) lack of healthy eating behaviors, less frequent consumption of vegetables, fruit, milk, cold cuts, cookies, and soft drinks; and "D" (19.3%) more frequent consumption of all unhealthy foods and less frequent consumption of fruits and vegetables. The results indicate the need for interventions to promote healthy eating in this age group.