Centers for Disease Control and Prevention
The Statistics Center includes basic statistics on HIV/AIDS, overview of prevalence in the U.S., incidence estimates, fact sheets, slide sets, software and datasets, and reports.  Includes access to the annual HIV/AIDS Surveillance Reports.

The Joint United Nations Program on HIV/AIDS includes a Report on the Global AIDS Epidemic, updates, methodological information, country monitoring systems, resource tracking, and an interactive map features

This organization's online HIV/AIDS Surveillance Data Base is an international compilation of HIV prevalence and incidence data resources from various sources for countries in Africa, Asia, Europe, Latin America and the Caribbean, and Oceania. The HIV/AIDS Surveillance Data Base is designed to provide users with information on HIV/AIDS and is helpful as both a reference tool and a resource for policy, research, and evaluation. This website is maintained by USAID and the U.S. Census Bureau.