Prevalence rates and reasons for substance use were studied in a sample of 172 male construction industry apprentices who had a mean age of 20 years. Results were compared with those of men in similar age groups in Victoria, and regional and age differences were explored. Findings indicate that more metropolitan apprentices had experimented with cannabis, amphetamines and cocaine than their rural/regional counterparts. However, more rural apprentices indicated consuming alcohol than their metropolitan counterparts. Apart from alcohol use, older apprentices (aged 20 years and over) were also more likely to have used cannabis, amphetamines and cocaine than younger apprentices (aged 15-19 years). The majority of apprentices used substances for enjoyment ("It is fun/I like it") or social reasons ("Friends use it"). The findings are discussed in the context of the literature, and suggestions for future research are made. (Contains 5 tables.)