U.S. Statistics: The classic tool for U.S. statistical data is the Statistical Abstract of the United States (now by ProQuest; published by the U.S. Census Bureau from 1878 until 2011). The print edition can be purchased from Bernan. Information about the online edition is available here.
Data.gov links to statistical data posted on U.S. executive agency Web sites. The Administrative Office of the U.S. Courts compiles statistics on the Federal judicial system. The University of Michigan has a Web page of links to statistical sources. Otherwise, sources for statistical information are listed in this Guide by subject, notably, "Crime Statistics," "Economic Data and Statistics," "Labor Statistics" and "Vital Statistics."
Foreign Statistics: The United Nations Statistics Division posts world-wide statistical data. The Census Bureau posts links to the web sites of foreign statistical agencies. Links to U.S. and foreign statistics of all kinds are posted by OFFSTATS and Statistics Finland. A wide variety of European statistics is posted on Eurostat.