This study compared the psychosocial and emotional adjustment of siblings of children with autism and siblings of non-disabled children. In addition, differences between self and parent reports, as well as various demographic characteristics were examined. Fifty-one siblings of children with autism and 35 siblings of non-disabled children, between the ages of 7 and 17, along with one parent of each sibling, participated. Results indicated that the presence of a child with autism appears to enhance the psychosocial and emotional development of non-disabled siblings when demographic risk factors are limited. However, the presence of a child with autism appears to have an increasingly unfavorable impact on the non-disabled sibling as demographic risk factors increase.