The NYC Health Department has recently made available databases of health publications, presentations and sortable health statistics through My Communities Health.
The NYC Health Department also hosts EpiQuery, an interactive health data tool
designed to allow users to ask their own public health questions with several datasets, including adult and youth survey data and vital statistics mortality data.
US Health and Demographic Data
http://infoshare.org
This site provides a wide variety of data from various demographic, socioeconomic, and health data sets. The first choice you make is whether you want data for a single geographic area, a comparison of two areas, or a two-way table. http://www.census.gov
This is the census web site. You can download tables and actually access census data from this site. The bulk of the data available at this point are not broken down to fine geographic distinctions. For example, you can get national, state, metropolitan area and some county distinctions.
http://cdc.gov/nchs
This sites gives you access to all of the U.S. federal health data sets. NCHS stands for the National Center for Health Statistics. The NCHS data sets include: National Survey of Family Growth, National Health and Nutrition Examination Survey, National Health Interview Survey, Vital Statistics, and the National Immunization Survey.
International Health and Demographic Data
Macro International's DHS data site, which permits you to request specific results for specific countries and build your own database. This is limited, of course, by where and when DHS surveys have been carried out. Macro also has analytic reports of various demographic trends.
The WHO website has a window for research tools which provides access to country-based health-related statistical information.
Refugee and IDP Statistics
www.unhcr.org
Statistics page from which one can download data as an excel file.
Forced Migration Online (FMO) provides access to a wide variety of online resources concerning the situation of forced migrants worldwide.
The Alan Guttmacher Institute Custom Table Maker enables you to build a table in three screens. Choose from over 200 measures for a regionally diverse group of more than 100 countries. They have a large number of marriage, fertility, contraception, abortion and measures. Selected U.S. data are also available by state.