FedStats, provides access to the full range of official statistical information produced by the Federal Government without having to know in advance which Federal agency produces which particular statistic.
Google Public Data Explorer provides public data and forecasts from a range of international organizations and academic institutions including the World Bank, OECD, Eurostat and the University of Denver. These can be displayed as line graphs, bar graphs, cross sectional plots or on maps (from Wikipedia).
Pew Research Center Datasets, conducts public opinion polling, demographic research, media content analysis and other empirical social science research. Access to the data archive is available with free registration.
The Statistical Abstract of the United States, published since 1878, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States. NOTE: Effective Oct. 1, 2011 the Census Bureau no longer publishes the Statistical Abstract of the US. It is now available as the PQ Statistical Abstract on the library's page of databases (be sure to log in to Esearch to use).
United Nations Statistics Division compiles and disseminates global statistical information.
WorldDataBank (The World Bank), is an analysis and visualisation tool that contains collections of time series data on a variety of topics. You can create your own queries; generate tables, charts, and maps; and easily save, embed, and share them.
For more links to websites and statistical sources consult the library's Sociology Subject Guide