Media reports have suggested that the use of 3, 4-methylenedioxymethamphetamine (MDMA or "ecstasy") is a significant problem across the United States. To date, however, available evidence has shown that the use of ecstasy has been concentrated among "rave" attendees, with mainstream youth remaining relative-immune from its proliferation. In the current study we build on the ecstasy literature by examining the drug-using behaviors of 2,258 high school seniors with data collected through the Monitoring the Future program in 2002. Prevalence estimates of ecstasy use are generated and associations between ecstasy use, demographic characteristics, and alcohol and other drug use are explored. Ten percent of the sample reported lifetime ecstasy use, 7% reported use within the past 12 months, and 3% reported use within the past 30 days. Compared to non-users, 12-month ecstasy users were significantly more likely than non-users to be white and to have used all other drugs of abuse during the 12 months preceding the interview. These results suggest that ecstasy-related prevention efforts should target the at-risk population of rave attendees rather than the mainstream population of high school students.