Demography and Health

Max Planck Institute for Demographic Research
http://www.demogr.mpg.de/
Some of the institutes publications are available from this site.

Statistics Canada
http://www.statcan.ca/start.html
Entry site for Canadian information

World Health Organisation Information Systems
http://www.who.int/whosis/
Health data from member countries can be downloaded from this site.

US Census Bureau
http://www.census.gov/
Entry site for US census information

United Nations Population Information
http://www.un.org/popin/

World population trends