This report is sponsored by the Substance Abuse and Mental Health Administration (SAMHSA), and presents the findings of the 2002 NSDUH, an ongoing survey of the civilian, noninstitutionalized population of the United States aged 12 years old or older. Approximately 68,000 people were interviewed in 2002. State estimates presented in this report are based on data collected in 2002 and have been developed using a small area of estimation (SAE) procedure in which State-level NSDUH data are combined with local-area county and census block group/tract-level data from the State. These model-based estimates provide more precise estimates of substance use at the State level than estimates based solely on the sample. Because the SAE methodology is essentially the same as that reflected in the 2001 State report, the 2002 NSDUH State report has been reduced to a single volume that covers the prevalence rates and a discussion of the results. Nationally, 136,349 addresses were screened and 68,126 persons were interviewed within the screened addresses. The 2002 survey was conducted from January through December 2002. The screening response rate for 2002 was 90.7 percent, and the interviewing response rate was 78.6 percent, obtaining an overall response rate of 71.3 percent. In 2002, the overall State response rates ranged from 60.9 to 83.1 percent. The data cover tobacco use; alcohol use; and treatment for illicit drug dependence, alcohol dependence, and serious mental illness. The findings presented in this report are divided into seven chapters, including the introductory chapter, along with maps, and data tables. The national results from the survey were released in September of 2003. A complete listing of previously published reports from this survey and other data sources is available from OAS. List of figures, and tables