In this study, the authors compared the behavioral development of 4- to 8-year-old South Korean children placed in institutional care (n = 230) or adopted internationally (n = 382), with age of entry, parental status, reason for institutionalization, and postinstitutionalization parental contact as risk factors for institutionalized children. There was a placement effect of adoption and support for age of entry and parental status as risk factors. Relinquished children institutionalized before age 2 fared the poorest across groups. Children institutionalized after age 2 with deceased/unknown parents fared best among institutionalized children. Institutionalization due to family disruption was a risk for relinquished children only, whereas parental contact did not increase the risk for behavioral problems. The unique sample population and other limitations are discussed. (Contains 4 tables and 1 figure.)