: Obesity is one of today's most blantantly visible yet most neglected public health problems. Obesity has become a global epidemic and one of public health problems that should be handled. Adolescent lifestyle who always skip breakfast and more likely to consume fast food and tend to be sedentary lifestyle, make adolescent at risk for obesity. This study aims to obtain the prevalence of obesity among adolescent in Minahasa. This is a cross-sectional study. Data retrieval is done by measuring the waist circumference of 395 high school student consisting 140 boys and 255 girls. The result show that the prevalence of obesity among adolescent in Minahasa is 26,33% consisting 4,30% boys and 22,03% girls. The prevalens of obesity is high so that education to adolescents, parents, and school about obesity causes, complications, and preventions is needed