Recognition of systemic hypertension in children and adolescents requires careful blood pressure measurement using proper technique to compare with appropriate normative data. Selected use of ambulatory blood pressure monitoring can identify children with "white coat" hypertension, thus avoiding unnecessary diagnostic testing and treatment in these children. Nonpharmacologic therapies including dietary sodium restriction, weight loss, and exercise may benefit children and adolescents with borderline hypertension and mild essential hypertension. These therapies may be important adjunctive agents in children requiring antihypertensive therapy as well. Historically, pharmacologic management of hypertension in children has been limited by a lack of controlled studies and age-appropriate formulations. Recent clinical trials have provided new information regarding a number of antihypertensive agents in this age group.