This report provides 2013 estimates on the prevalence of substance use disorder and mental illness in the United States. It also reports on the need for and barriers to substance use treatment, mental health care, and co-occurring substance use disorders and mental illness.

This NSDUH report presents results of a survey of illicit substance, alcohol, and tobacco use among people 12 years of age and older. It Includes national estimates of the rates of use, trends, numbers of users, and other measures, such as youth-related prevention measures.

This report examines trends in illicit substance use from 2010 to 2011 and from 2002 to 2011 among Americans 12 and older, comparing differences by age group and gender. It also discusses disparities in the need for specialized treatment versus those who actually receive it.