This report presents 2016 national estimates of use of alcohol, tobacco products, illicit drugs (such as, marijuana, cocaine, heroin, hallucinogens, and inhalants, as well as the misuse of opioids, prescription pain relievers, tranquilizers, stimulants, and sedatives), substance use disorders, and substance use treatment among people 12 years of age and older. It Includes national estimates of any mental illness, serious mental illness, major depressive episode, use of mental health services and suicidal ideation among adults ages 18 or older and national estimates of major depressive episode, use of mental health services among adolescents aged 12 to 17. Trend information on these topics are also presented.