Based on information from the 2005 Census of Jails, a
sample of jail jurisdictions was selected for the 2006 survey. The
sample included public and private jails in 874 selected jail
jurisdictions including 63 regional jails. A stratified random sample
of county or city jurisdictions was stratified by average daily
population (ADP) as reported by the 2005 Census of Jails. Large jails
and regional jails were included in the sample with certainty.
All jail jurisdictions (i.e., counties, municipalities,
boroughs, etc.) identified through the 2005 Census of Jails.