Economist Intelligence Unit’s dedicated regional China service. Source of data, economic statistics, analysis, and forecasts for China's 31 provinces and 292 largest cities. Includes access to the Access China data tool, which facilitates access to the underlying data and output to Excel.
IPUMS International is dedicated to collecting and distributing census microdata from around the world. The project goals are to collect and preserve data and documentation, harmonize data, and disseminate the harmonized data free of charge.
103 countries – 547 censuses and surveys – over 1 billion person records
If you need to look up basic statistics for countries, the following sources are good starting points: