This report uses data from the Treatment Episode Data Set (TEDS) for 2008 to provide information on the characteristics of youths aged 12 to 14 admitted to substance abuse treatment. In 2008, approximately 23,770 substance abuse treatment admissions were adolescents aged 12 to 14. The two most frequently reported primary substances of abuse among these admissions were marijuana (63.0 percent) and alcohol (20.8 percent). Nearly one half (45.5 percent) of admissions aged 12 to 14 reported multiple substances of abuse at admission, and almost one quarter (24.7 percent) had a psychiatric disorder in addition to their substance use problem. Nearly one fifth (17.3 percent) had been admitted to treatment at least once prior to their current admission. (Contains 6 figures and 6 endnotes.)