Annual Survey of Jails (Bureau of Justice Statistics)
Administered to a sample of approximately 950 local jails (city, county, regional, and private) nationwide, the Annual Survey of Jails (ASJ) provides national estimates on the number of incarcerated persons confined in jails, demographic characteristics and criminal justice status of the jail population, holds for federal and state prison authorities, counts of admissions and releases, number of jail employees, and rated capacity.