This is the first national study to examine extreme binge drinking among adolescents. It utilizes data from Monitoring the Future (MTF45) to examine the prevalence and predictors of 5+ binge and 10+ and 15+ extreme binge drinking among nationally representative samples of American high school seniors from 2005 to 2011. Annually since 1975, MTF has used questionnaires administered in classrooms to survey nationally representative samples of about 16,000 American high school seniors (at modal age 18) each year.67 Measures assessing 5+ binge have been included since the inception of the study and are consistent with other studies16; measures of extreme binge drinking were added in 2005.