Objectives: Children victimized by violence are often treated in the emergency department (ED). However, our understanding of the magnitude and financial costs of this patient population is inadequate. The authors examined the scope, risk factors for, and financial cost of ED visits for intentional injury in children in the United States over time.Methods: Using data from the National Hospital Ambulatory Medical Care Survey (NHAMCS) from 2000 through 2008, the records of children aged 0 to 17 years evaluated in an ED for intentional injuries were examined. Nationally representative rates of ED visits for intentional injuries, the proportion of ED visits accounted for by children with intentional injuries, and risk factors for intentional injury visits were calculated. The Web-based Injury Statistics Query and Reporting System (WISQARS) Cost of Injury Reports was used to generate the medical costs accrued by intentional injuries in children.Results: Almost 340,000 children were treated in U.S. EDs each year from 2000 through 2008 for intentional injuries, comprising 1.2% (95% confidence interval [CI] = 1.1% to 1.4%) of all U.S. pediatric ED visits. The rate of ED visits for violent injuries has not changed over time. In 2008, 49 children per 10,000 (95% CI = 36 to 61) were treated in the ED for a violent injury. In a multivariate model, increasing age, residing in a metropolitan area, African American race, and the lack of private insurance were independent predictors of intentional injury visits among children. In 2005, the aggregate medical cost of intentionally inflicted injuries in children in the United States was $765 million.Conclusions: ED visits among children for violent injury still represent an important clinical, public health, and economic challenge. The ED could be considered as a potential venue for prevention and intervention efforts.ACADEMIC EMERGENCY MEDICINE 2012; 19:535-540 ª 2012 by the Society for Academic Emergency Medicine V iolence perpetrated against children is a serious social and public health problem in the United States. In a nationally representative survey of American high school students, 32% reported that they were involved in at least one physical fight in the previous month, and 3.8% required medical attention for injuries resulting from a physical fight.1 A national report from 2008 found that 46% of U.S. children aged 17 years and younger were assaulted at least once in the past year, and 10% were injured in an assault. 2 Homicide is the second leading cause of death for persons aged 10 to 24 years in the United States. In 2007, an average of 16 people in this age group were the victims of homicide each day.