The following report describes the results of a national study of the role of family therapy in the drug abuse field. Characteristics of agencies that work with families are described, as well as the demographic characteristics and psychological problems of the clients most apt to be treated in family therapy. The study also looks at the role and structure of family therapy in the ecological system of the treatment institutions. A profile of the family therapists who are responsible for providing services to families is presented. An attempt was made to assess agencies' level of development with regard to family therapy by using an instrument, The Progress Index for Family Therapy Programs. Generally, findings indicated that there is considerable variation in expertise. More extensive training in family therapy techniques was of major concern, particularly among clinics with a heroin addict population.