The following sites provide up-to-date snapshots of the world's elder population, as well as projections of its size and composition in the future.  Information is also available by region and country.

World Snapshot: A quick reference table that provides useful information about the age structure, infant mortality rates, and life expectancies across world regions.  This table documents dramatic differences in the age structure and life expectancy between less and more developed countries—less developed countries have much younger populations than their more developed counterparts.

Country Snapshots:  This database, provided by the U.S. Census Bureau, allows you to obtain summary demographic data and population pyramids for 227 countries worldwide. 

Social Security Program Summaries: This database presents summaries of social security programs for each of 172 countries.  The tables are presented in PDF format.  If you do not have the Adobe Acrobat Reader necessary to read these files, you can download a free copy by clicking here.

Gender Statistics: This site, supported by the United Nations Economic Commission for Europe, provides country-specific data on gender for European and North American countries, covering educational attainment, employment, parliamentary membership, leading causes of death, non-marital births and births to teens, life expectancy at birth, women's income as a percentage of men's, average age at first marriage, and a population pyramid.