Various quantities and types of services are provided by public and private agencies for older developmentally disabled persons living in the Midwest. Of the 639 questionnaires mailed to public agencies, private agencies, consumer-oriented agencies, nursing homes, and educational institutions, 325 were returned for a response rate of 55%. Overall, 56% of the agencies are providing services for aging and aged developmentally disabled (AADD) persons. AADD clients are "invisible," and few agencies are aware of them, let alone their needs. The existing services are poorly coordinated; adequate records are not being maintained to document services provided. The services most often provided, i.e., information/referral, adult activities, medical treatment, transportation and staff development, are primarily of an indirect nature; most direct services are provided by nursing homes. Major obstacles to service are lack of resources, negative attitudes, and lack of training. Adequate transportation and housing are identified as the greatest unmet needs of the AADD persons. Even if provided adequate funding, most agencies would do nothing new in terms of service delivery. (Author/HLM)