The 2018-19 Canadian Student Tobacco, Alcohol and Drugs Survey (CSTADS), previously called the Youth Smoking Survey (YSS), is the tenth cycle of data collection on student tobacco, alcohol, and drug use. A total sample of 62,850 students in grades 7 to 12 (secondary I through V in Quebec) completed the survey, which ran between October 2018 and June 2019 in ten Canadian provinces. The weighted results represent over 2 million Canadian students. CSTADS 2018-19 collected information on tobacco use, alcohol and drug use, as well as information on bullying and sleep.