Family members provide the majority of care for individuals with disabilities in the United States. There is growing recognition that family caregiving deserves and may require societal support, and evidence-based practices have been established for reducing stress associated with caregiving. A substantial research literature on family support has developed, but researchers, advocates, and professionals have often worked in separate categorical domains such as family support for caregiving for the frail elderly, for individuals with mental illnesses, and for people with developmental disabilities. This article considers the merits of a cross-categorical analysis of family support. Examples of concepts from one domain of family support are applied to other domains to illustrate the potential benefits of a broader exchange of ideas.