The study examines the epidemiology of oppositional defiant disorder (ODD) for children with intellectual disabilities (ID; n = 49), children with borderline intellectual functioning (BIF; n = 20), and typically developing children (TD; n = 115). The Diagnostic Interview Schedule for Children was administered to mothers at child ages 5, 6, 7, 8, and 9 years. Children with ID had consistently higher rates of ODD than TD children, whereas children with BIF had intermediate prevalence rates. The comorbidity of ODD with other disorders, especially attention-deficit hyperactivity disorder, was elevated for children with ID. There were no group differences in gender, age of onset, or stability of ODD and all of the groups endorsed symptoms of ODD with the same relative frequency. Accordingly, the study findings generally support the assertion that ODD is the same disorder for children with and without ID. (Contains 6 tables and 2 footnotes.)