The 2004 National Drug Strategy Household Survey was conducted between June and November 2004. This was the eighth and largest survey in a series which commenced in 1985, and was the third to be managed by the Australian Institute of Health and Welfare (AIHW). Almost 30,000 Australians aged 12 years and older participated in the survey, in which they were asked about their knowledge of and attitudes towards drugs, their drug consumption histories, and related behaviours. To enable comparisons over time, many of the analyses reported in the 2004 First Results report are based on the population aged 14 years and over.