Immensely helpful. Guided and advanced and basic search capabilities. Can limit search retrieval to data sets. Provides statistics from the Economic Census, the American Community Survey, and the 2010 Census, among others. 2013 estimates provided.
Browse its data archive on world religions using online features for generating national profiles, GIS maps, church membership overviews, denominational heritage trees, tables, charts, and other reports
Centers for Disease Control and Prevention provides weekly statistics on selected notifiable diseases in the United States and U.S. territories. Click on Weekly Report then on Current Volume to see the current issues
"OpenSecrets.org is your nonpartisan guide to money's influence on U.S. elections and public policy. Whether you're a voter, journalist, activist, student or interested citizen, use our free site to shine light on your government."
Nonpartisan organization that surveys the public about the issues, attitudes, and trends shaping the world, including public opinion polling, demographic research, content analysis, and other data-driven social science research. Some datasets available - must set up a free account.
Comprehensive summary of statistics on the social, political, and economic organization of the US, including 1400+ individually indexed tables (with attached spreadsheets), both searchable and browsable.