The prevalence of child and adolescent obesity is increasing globally and in Singapore, and primary care providers play an important role in stemming this rise. Accurate measurement of Body Mass Index (BMI) and monitoring of growth across time can enable early diagnosis and intervention. Addressing childhood and adolescent obesity and its consequences should be done in a sensitive and non-judgemental manner. Childhood and adolescent obesity have adverse medical and psychosocial consequences and early screening for these complications is important in assessment. Adopting a family-based approach for healthier lifestyle changes is important in the prevention of childhood and adolescent obesity. Pharmacotherapy may be considered as an adjunct to lifestyle changes in selected cases.