Tobacco use represents a key issue in workplace health, and much can be learned from countries where occupational smoking data has been regularly collected on a national basis. This article reviews national smoking surveys previously conducted in Australia and the United States between 1970 and 2005, and examines their relevance to the field of occupational tobacco control. When the first preliminary research was undertaken over 35 years ago, tobacco smoking was a regular feature in the general population of both countries, albeit with higher rates often documented among blue collar workers. Recent national investigations however, suggest that certain historical differences in smoking prevalence rates by occupation are persisting as we enter the 21st century. Detailed examination also indicates that employee sub-groups, such as cleaners and construction workers, are now bearing much of the occupational smoking burden in Australia and the United States. As such, there is an urgent need for more aggressive and finely targeted tobacco control activities in the workplace, as well as increased cooperation between tobacco control organizations, labor unions and other stakeholders, so that they may more effectively combat this ongoing threat to workers' health.Key words: Smoking, Occupation, Tobacco, Australia, United States, Survey, Epidemiology decrease absenteeism and increase productivity among staff 17) .Even so, one of the major historical conundrums in occupational tobacco control is the fact that smoking rates are not evenly distributed across all job categories 18) . Indeed, during recent years, growing disparities in tobacco consumption have become increasingly apparent across many occupational subgroups 19) . Although community smoking rates are declining in many countries, certain occupational groups, such as blue-collar workers, still continue to use tobacco at high rates when compared to their white collar counterparts 19) . Unfortunately, many of the impressive reductions in community smoking rates achieved last century have largely bypassed the blue collar workforce. Given the fact that the workplace represents an ideal location for anti-smoking programs among staff [15][16][17] , occupational smoking studies have an important role in identifying exactly which workplaces would most benefit from tobacco control interventions. In order to most effectively distribute and target preventive health care efforts at a national level therefore, accurate and upto-date information on national tobacco smoking rates by job category are essential.From an epidemiological perspective, there is also the critical issue of statistical confounding in occupational mortality studies, given the fact that tobacco plays such a major role in the development of many chronic workplace diseases. Smoking and occupation are known to be substantially confounded 20,21) , and a lack of accurate data may lead to biased assessments of the relationship between disease and occupational exposures 22) , particularly when the occupat...