Until the early 1980s, most researchers paid little attention to sibling relationships. Studies of mothers dominated the research agenda, to the almost total exclusion of fathers, extended families, and siblings. Although in early classic studies of families of children with disabilities, investigators embraced a family systems approach that included siblings (i.e., Farber & Jenne, 1963), this emphasis did not take root until recently. There has been an impressive growth in the number of published studies focusing on siblings of children with disabilities. In this paper, my goal is to examine themes in this research and reflect on our state of knowledge.