The major benefit of the Gapminder site is Gapminder's ability to quickly and easily visualize data, particularly correlations and changes over time.
Formerly the World Development Indicators and Global Development Finance. Hundreds of economic and social indicators, with 40 years of data for some series, for every country in the world.
Search statistical data gathered by 15 UN agencies, including the World Health Organization, UNICEF, the United Nations Development Program, and the Food and Agriculture Organization.
Cross-search publicly available data sets. Includes data sets from around the world, with the strongest coverage in the United Kingdom, Canada, and the United States. A project of the Open Knowledge Foundation.
Statistics - National Agencies and Compendia
A list of links to the Web sites of the national statistics-gathering agencies for all of the countries in the world, maintained by the Vanderbilt University Libraries.
Economic, financial and social indicators for countries in Asia.
The statistical office of the European Union. Economic, demographic, social, and other statistics.
Inter-American Development Bank
Economic, social, and political data for Latin America and the Caribbean.
United Nations Economic Commission for Europe
Statistics and data on a wide range of topics, including the economy, demographics, health, crime, education, science and technology, and transportation, for countries in Europe, North America, and Central Asia.
United Nations Economic Commission for Latin America and the Caribbean
Social, economic, environmental, demographic, and technology-related statistics.
United Nations Statistical Databases
Several databases of demographic information, plus databases on disability, oil, the Millennium Indicators, and more.
Data on demographics, the economy, education, etc. in the United Kingdom. Also includes some international data. Maintained by the Guardian newspaper.