Nowadays, obesity is considered a global pandemic since in 2014 it reached 1,9 billion people. This problem has been more present in younger populations, being mainly influenced by their eating habits and sedentary lifestyle. The objective of this study is to determine the prevalence of overweight and obesity in children and adolescents, relating it to their risk factors. Materials and Methods: A total of 327 students aged between 9 and 19 years old (133 were male and 194 were female) participated in this study. They completed a questionnaire and the lipid profile was evaluated. Results: Most of the students had a normal body mass index. 59 students were overweight (mostly female), 16 were obese and 7 had a lower weight than expected. In the group of overweight and obese students, 43,1% and 50%, respectively, had reduced HDL values and a higher level of triglycerides was observed in 60,3% of overweight students and 56,2% of obese students. Conclusion: There is a relevant prevalence of overweight and obese individuals in this population. It is confirmed that the role of some risk factors such as physical inactivity and eating habits is really important in the development of this problem.