Provided by the Population Reference Bureau, the World Population Data Sheet (available in PDF) contains the latest population estimates, projections, and other key indicators for over 200 countries. A nice feature of the website is the "Datafinder" a search tool, accessible from the main menu at the top of the page. It can be used to find data by country, region, sub-region or worldwide. More reports and quick facts are also available at the site's home page. Resource also listed under Statistical Data Resources category.