Mental health services in Australia 2005-06 is the ninth in the series of AIHW's comprehensive annual reports on the characteristics and activity of Australia's mental health services. Details from a wide range of data sources for the 2005-06 period are presented, together with changes over time.Information on mental health care provided by a range of services is detailed. Included are ambulatory services (such as community-based services, emergency departments, private psychiatrists, allied health professionals and general practitioners), hospital and residential services and other services (such as supported accommodation services). In addition, information is provided on mental health-related prescriptions and mental health resources such as facilities, workforce and expenditure. Where possible, comprehensive data are provided for each state and territory, and comparisons are made between population groups (including Indigenous and non-Indigenous Australians, and overseas-born and Australian-born people). This report is a useful resource for health planners, policy makers, administrators, practitioners, researchers and others with an interest in mental health in Australia.