The census was conducted for all locally administered county and municipal jails with the authority to hold prisoners for more than 48 hours. The variables include jail population by legal status, age and sex of prisoners, maximum sentence, admissions and releases, availability of services to prisoners, structural characteristics and capacity of the jail, and expenditure and employment data for the facility. The data cover 3,493 jails in 45 States. Five States with integrated jail-prison systems were excluded from the study; one State with some locally operated jails in addition to an integrated jail-prison system was included. The data are available in card-image and OSIRIS formats.