This entry includes a brief history of the human immunodeficiency virus (HIV) in US prisons and jails. After a survey of methods used to measure HIV in prisons and jails, an overview of trends in HIV prevalence and characteristics of those living with HIV in correctional facilities is provided. The entry then examines reasons for the changes in HIV‐related trends in correctional populations, especially the role of improved treatment and health care delivery. A discussion of “importation” of disease versus intra‐facility transmission is provided, as well as the relationship between the communities from which HIV‐positive individuals come to corrections and the burden of disease encountered in correctional systems. Finally, both the substantive and symbolic functions of HIV in correctional settings are addressed.