World Population: A Guide to the WWW by Richard Jensen is a comprehensive set of links to the following:
Demographic Perspectives and General Resources
Overview of World Population: Countries, Regions
Sociological Data Sets, Techniques
Case Studies: Australia, Canada & USA
Case Studies: other
Fertility, Age Groups, Marriage, Women
Mortality, Morbidity, Health
Migration, Ethnicity, Minorities, Urbanization, Education; Class
Policy Perspectives
Other Recommendations; Teaching Tools