Objective To study whether normal‐weight obesity in childhood is associated with increased cardiometabolic risk in early adulthood. Methods This study assessed data for 236 girls followed from prepuberty to early adulthood. Growth chart data were obtained from birth to 18 years. Body composition was assessed by dual‐energy x‐ray absorptiometry and cardiometabolic risk by calculating continuous clustered risk score (at ages 11, 14, and 18). The association of body weight status with cardiometabolic risk from childhood to early adulthood was examined. Results Subjects with normal‐weight obesity were virtually indistinguishable from their normal‐weight lean peers in terms of relative body weight and BMI but had significantly higher fat mass (7.1‐7.3 kg) and cardiometabolic risk already in childhood, and this difference persisted into early adulthood (P <  0.001 for all). Conclusions Children and adolescents with normal body weight and high body fat percentage may be at increased risk for cardiometabolic morbidity in adulthood. Body fatness may be of utility in clinical practice to effectively identify children and adolescents at risk and to permit recommendation of lifestyle changes that could translate to lower risks of cardiovascular diseases in the future.