'Young Australians: their health and wellbeing 2007' is the third national statistical report on young people in Australia. Using a set of key indicators of health and wellbeing of young people, this report brings together the most up-to-date national data on the health status of young Australians aged 12-24 years and the factors influencing their health. Information on health status includes self-assessed health status, disability, injury, mental health, chronic disease, communicable diseases, hospitalisations and mortality. Factors influencing health addressed in this report include family and community environments, environmental factors, socioeconomic factors including education, employment and income and health behaviours such as weight, physical activity, nutrition and substance use. This report also includes a special section on the health and welfare of Aboriginal and Torres Strait Islander young people. Timely, comprehensive and accurate information on these factors will enable the formulation of appropriate and effective policies and interventions to achieve long term health and wellbeing for young people.