WHAT'S KNOWN ON THIS SUBJECT:Two small studies have been conducted on numbers of sport-related concussions in younger child athletes (pre-high school). WHAT THIS STUDY ADDS:This is the first study to characterize a national sample of emergency department visits for young child athletes compared with older athletes. abstract OBJECTIVES: The objective of this study was to characterize emergency department (ED) visits for pediatric sport-related concussion (SRC) in pre-high school-versus high school-aged athletes.