Primary hemochromatosis is a genetic disorder rarely recognized in childhood; its long-term consequences include cirrhosis and liver cancer. We report a family with primary hemochromatosis affecting three generations, including a 7-year-old child and a 29-month-old child; these are the youngest children with primary hemochromatosis yet reported. The pathophysiology, genetics, and clinical findings of this disorder are reviewed. Serum ferritin and transferrin saturation are useful screening tests; definitive diagnosis, however, depends on determination of hepatic iron content. A plan for evaluating and treating affected patients is proposed. Physicians caring for children must learn to recognize this potentially treatable disorder.