Alcohol is increasingly being recognized as a major cause of the greater burden of disease and premature death in eastern Europe than in the west. This requires a robust policy response but, in most countries in the region, there is little empirical data on patterns of consumption on which to base such a response. Until now, there has been no information on prevalence of drinking among the Bulgarian population. This paper describes a survey that seeks to address this weakness by describing the pattern of drinking in Bulgaria and its relationship with socio-demographic factors. It uses a multivariate analysis of data on patterns of alcohol consumption from a multi-stage nationwide survey of 1550 adults in Bulgaria, in 1997 which found that overall 50.7% of men and 13.6% of women drink at least weekly. In both sexes, drinking is least common among the elderly and those living in villages. It is also less common among those reporting their financial status as poor. Muslims are less likely to drink than are orthodox Christians. Drinking is most common among those living in cities, with higher education and high incomes. Heavy drinking, defined as 80 g/day or more, is rare among women, but is ascribed to 18.2% of men. Heavy drinking was much more common among men living in Sofia and was less common among those whose financial situation was poor. At the levels of drinking reported, it can be expected that alcohol is making a substantial contribution to the burden of disease and premature mortality in Bulgaria. A coordinated, effective policy response is required. Although some of the legal prerequisites are in place, they are poorly enforced and there is no overall strategy to address this issue.