We determined the prevalence of tobacco consumption among the general population and established its distribution considering socioeconomical variables. We performed a cross-sectional study with 2781 subjects from 93 rural and urban areas, selected by randomized, census-based, multi-staged and stratified sampling. 40.9% of the population from Aragon are regular smokers (58.6 of men and 23% of women). Heavy smokers comprise 17.2% of the total (30.1% of men and 3.8% of women). The higher proportion of smokers in observed among single men over 40 and single women under 40. The percentage of smokers is lower among 20 to 29-years-old young people from high socio-economical than from low levels. In general, the mean percentage of smokers among men and, specially, among women from rural areas is higher than in the rural areas. In Aragon, tobacco is a risk factor affecting 41% of the adult population and, specially, young people, men, single persons from both sexes and living in urban areas. It seems that young people with a high socio-economical level are becoming smokers at a lower frequency.