The purpose of this study was to examine the association between sexual abuse and eating disorders in a voluntary community sample of Mexican American women. Eighty eating disorder cases were compared to 110 healthy controls on presence of sexual abuse and on characteristics of the abuse. The Structured Clinical Interview for the "Diagnostic and Statistical Manual of Mental Disorders" (4th ed., text revision) and the Eating Disorder Examination were used to determine diagnoses and psychiatric comorbidity. Results indicated that compared to controls, cases were more likely to report sexual abuse and had experienced more instances and longer duration of abuse. For the majority of cases, sexual abuse occurred before onset of eating disorder symptoms. There was no relationship between sexual abuse and type of eating disorder or psychiatric comorbidity. Sexual abuse seems to be a risk factor for disordered eating in Mexican Americans. Prolonged abuse and revictimization may increase this risk.