For this study of social work degree programs, data were drawn from the Council on Social Work Education (CSWE) website, the Group for the Advancement of Doctoral Education (GASE) website, and the websites of 841 U.S. social work programs, including the 763 programs accredited (or in candidacy for accreditation) by CSWE when these data were collected. This article provides a context from relevant literature, enumerates the structures of social work units, identifies the most common departments and schools where they are found, and analyzes several factors associated with structure and placement of those units. Implications include the benefits of independent social work units rather than placement within a host department, and association with professional rather than liberal arts disciplines.