A 225-item questionnaire was completed by 5163 female 7th, 9th and 11th grade public school students in their classrooms to examine factors associated with eating disorders among girls involved in weight-related sports. Eating disorder symptoms were found in almost one third of girls involved in weight-related and non-weight-related sports. However, after controlling for grade, race, SES, and study design effect, girls in weight-related sports were 51% more likely to have eating disorder symptoms. Also, among girls in weight-related sports who had eating disorders, substance abuse, physical and sexual abuse history, depressive symptoms, suicide attempts, low family communication, and low parental caring were 98% to 377% more common.