Abstract:Three drug use surveys employing a standardised questionnaire format and sampling procedure were conducted on samples of New South Wales school students in 1983, 1986 and 1989. Alcohol and tobacco were the most frequently used substances across the surveys, with rates of use of illicit substances being considerably lower. Declines in the prevalence of alcohol, tobacco and stimulant use were found between 1983 and 1986 and between 1986 and 1989 for both males and females. Rates of use of inhalants, sedatives, hallucinogens and narcotics declined between 1983 and 1986, but remained unchanged between the 1986 and 1989 samples. Cannabis use declined significantly among females between 1983 and 1989, but not among males. Possible reasons for the general decline in drug use over the six‐year period are discusse