Several epidemiological studies have indicated the growing use of waterpipes in all WHO regions and among young people and adults of both genders. According to the Global Youth Tobacco Survey, of tobacco use among 13–15-year-old children, use of tobacco products other than cigarettes increased in 34 of 100 sites surveyed, which was largely attributed to rising water pipe use. The prevalence was 6–34% in the countries that reported data (38). Although nationally representative data on water pipe use by adults are not widely available, the Global Adult Tobacco Survey showed that water pipe smoking may be emerging in countries in which this tobacco product was not used previously (34). In this section, we present the epidemiology of water pipe use in the six WHO regions.