Current tobacco-control strategies seek to inhibit and reduce smoking among adolescents. However, such strategies are probably undermined by the contraband tobacco market. Using data from Canada’s 2006/2007 Youth Smoking Survey, we found that 13.1% of respondents who were daily smokers reported that contraband cigarettes were their usual brand. They consumed significantly more cigarettes than respondents who smoked other brands. Contraband cigarettes accounted for about 17.5% of all cigarettessmoked by adolescent daily smokers in Canada overall, and for more than 25% in the provinces of Ontario and Quebec.