Major findings from the study include: education status was strongly related to patterns of alcohol use, but relationships with every other category of drug use except heavy alcohol/marijuana use were non-significant; occupation of the respondent was significantly related to every drug use measure except use of inhalants; associations between personal income and drug use were significant for most drugs with the likelihood of use declining as income levels rose; the relationships between race/ethnicity and drug and alcohol use varied substantially depending on the specific drugs considered; males were significantly more likely than females to use alcohol and all categories of drugs except psychotherapeutics; and the relationships between age and drug use were strong and consistent, with respondents aged 18-25 having the highest prevalence of use for all drugs, except crack and heroin. Other variables examined in this report included marital status, employment status, number of jobs and residential moves within the past 5 years, region, and census block characteristics. This report presents findings from the 1988 and 1990 National Household Surveys on Drug Abuse regarding socioeconomic and demographic correlates of drug and alcohol use. The report is intended to provide a descriptive and comprehensive overview of sociodemographic patterns of drug and alcohol use in the general U.S. household population. Prevalence rates for alcohol, marijuana, cocaine, psychotherapeutic drugs, inhalants, hallucinogens, crack, and heroin are presented for socioeconomic and demographic variables. Tables, figures, and references