This report focuses on the current status of national and state information systems on residential services for persons with developmental disabilities. Ten national databases and 24 state databases are profiled. Each profile presents a summary of the types of information collected and how this information can be accessed. Data elements are presented to identify possible linkages or data aggregations across state data collection efforts or to suggest potential comparisons across states. Each database summary includes the following information: sponsor, population included, purpose/relevance, design, periodicity, geographic level, sociodemographic data, services data, publication of data, and contact person. The report also suggests supports that would assist states in improving, utilizing and sharing their data collection systems. Three tables are provided indicating the individual characteristics, functional characteristics, residential service types, and funding source of the different databases. An appendix lists state database contacts. (CR)