The research has the intention to determinate the prevalence, risky factors of overweight and obesity in a sample of six hundred people between seven (7) and eighteen (18) years old, chosen by a simple random sampling with exclusion criteria, pathologies that affect the weight and size (diabetes paralysis; malformation or physic limitations). The data was collected through national poll of the nutritional situation and Colombia ENSIN, in the demographic and anthropometric information register and poll identification of food habits and physical activity questionnaire for children PAQ-C. The comparative analysis was made through SPSS in two determined populations by the low and medium social status criteria in the overweight and obesity variables, risky factors related with physical activity food habits and gender. It can be concluded that the population presents normal weight, prone to obesity. Based on the medium socioeconomic status, the percent of male obese teenagers is higher than the female one. Children independent of the socioeconomic status, present a higher percentage of obesity than teenagers. A high percent of population do not do physical exercise. There is no evidence of the relation between socioeconomic level and the presence of unhealthy food habits.