For U.S. HIV/AIDS statistics, see the U.S. Centers for Disease Control and Prevention (CDC) website on HIV/AIDS Statistics and Surveillance.
You can also make data requests from the CDC, at their Contact CDC page.
For historical study, see Past Issues back to 1982 of the CDC Surveillance Report.
The Kaiser Family Foundation also has lots of good statistical analysis at their HIV/AIDS in the US webpage. There isn’t one single statistics page, but if you use their Sort tool, at the bottom of the page, you can sort by Document Type: Charts & Data and Subtopic: HIV/AIDS in the US.
Other National Health Statistics
General National Statistics