The Substance Abuse and Mental Health Data Archive (SAMHDA) is sponsored by the Center for Behavioral Health Statistics and Quality, SAMHSA, and is located at the Inter-University Consortium for Political and Social Research, Institute for Social Research, University of Michigan. It provides easy access to current and comprehensive data on substance abuse and mental health. All data sets are available for download directly from the SAMHDA website in multiple file formats. In addition, SAMHDA offers online data analysis, tools to customize graphs/charts, interactive maps, bibliographies, and user support.