- Airport Traffic Data (Airports Council International)
- Census Dates For Countries 1945-2014 (U.S. Census Bureau)
- Country Population (Citypopulation.de)
- Country Population 1950 through 2050 (UN Population Database)
- Country Briefings (Economist.com)
- Country Statistics [DataFinder] (Population Reference Bureau)
- Demographic Data Search (Population Reference Bureau)
- Environmental Data [Geo Data Portal] (UNEP)
- Eurostat (Statistical Office of the European Communities)
- Global Statistics (GeoHive)
- Health Statistics [World Health Report] (World Health Organization)
- Historical Population Estimates - Europe
- Human Development Reports (UNDP)
- International Data Base (U.S. Bureau of the Census)
- IPUMS International - Census Microdata for Social and Economic Research
- Migration Data (Migration Policy Institute)
- Military Expenditures (SIPRI)
- Military Statistics Data - FIRST Facts by Country (SIPRI)
- OECD Statistics (OECD)
- Penn World Tables (University of Toronto)
- Population Estimates (World Gazetteer)
- Population Index
- Religion Statistics (Adherents.com)
- Social Indicators (United Nations Statistics Division)
- Social Science Information Gateway - Statistics (Intute:Social Sciences, U.K.)
- State of World Population 2007 (United Nations Population Fund)
- Trade Statistics (European Union)
- Trade Statistics - UNCTAD Handbook of Statistics 2008 (UNCTAD)
- Trade Statistics (WTO)
- UN Comtrade
- World Bank Data Query
- World Bank eLibrary
- World Development Indicators (WDI Online)
- World Population Clock (Census Bureau)
- World Population Data Sheet 2008 (Population Reference Bureau)
- World Population Clock
- World Population Prospects Population Database - 1950-2050 (UN Population Division)
- World Population Trends (UNDP)