Data Bank - Statistics about global populations, societies, economies, and more from the World Bank
UNdata - Data and statistics gathered by the United Nations
United States Census Data - Information from the US Census Bureau about American people and business.
Zanran - A searchable database of global statistics
Federal Reserve Economic Data - Data collected by the research division of the St. Louis Federal Reserve
World Development Indicators - World Bank data on economically developing countries
Envirofacts - Search for environmental data and statistics in the United States by geographic location, topic, or land feature.
Pollution Rankings - Search statistics about pollution in the United States by state, county, or zip code.
National Center for Education Statistics - Data collected by the US Department of Education