Although the belief is strong in human service organizations that services should be coordinated to permit the resolution of the client's total problems, there is no consensus on what works best. To provide federal and state agency planners with information about research, trends, and issues in coordinating youth services at the state level, a three-phase research study was undertaken. First, coordination literature was reviewed and analyzed to extract key principles about the nature and success of coordination mechanisms. Second, a national survey of states (phone and mail) was conducted to identify and examine state level coordination of youth services and juvenile delinquency programs. Third, case studies were prepared on four states' efforts (New York, North Carolina, Alabama, and Maryland) to coordinate services in order to capture key elements of past experience that could guide future thinking and practice. Chapters 2-5 of this report detail the findings of these research efforts. Thirteen data tables are included to summarize the findings of the literature review and the state survey. The case studies describe the development, organizational structure, specific services, coordination mechanisms, and current issues and future plans for each of the four states. The three appendices provide the state-level survey questionnaire, a list of survey respondents with addresses, and a list of those who contributed to the case studies. (MCF)