Demographics   Census Bureau This area is a well formatted treasure chest of information. Within the Main Data Bank, a special page called Uncle Sam's Reference Shelf is the central page for the Statistical Abstract. Besides the many valuable data tables you can use here, it includes graphics of commonly requested statistical abstract data. Census Data at Lawrence Berkeley Laboratory Nationwide data from the 1970, 1980 and 1990 U.S. Censuses are available here. CD-Roms of the 1990 census are mounted for queries and ftp site with 125 Gigabytes of census data is also held here. If you work with census data, this is almost one-stop shopping. Office of Population Research, Princeton University The data archive here is a VERY nicely formatted collection entirely in HTML. Data is directly accessible by clicking on links. Some files are downloaded in zip (DOS) versions. Resources are well documented including sampling frame descriptions, missing data interpolation methods and relevant publications. Data include 10 fertility studies for the U.S., a longitudinal fertility study of a single European community (the Hutterite data), country-level data from the World Fertility Survey, Demographic and Health Surveys of developing countries (over 13 years) and Chinese Fertility Surveys ( Phase I and Phase II, and more! I wish all sites (and research!) were this well formatted. United Nations World Demographic Data (gopher) This collection of data sets (and some articles) provides a look at future world demographic trends. Areas of interest include trends in: population, migration, economics, and health.   U.S. Department of Health and Human Services At this site, you can view data from the "1994 Green Book" which contains various papers and data sets regarding poverty, income, welfare, employment, and many other demographic variables. Your best bet is to start with the files that begin with "apen." They are the appendicies to the document and contain many of the useful data tables. There is also an overview document explaining the purposes of the Green Book and the general format of the data.