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Jail Inmates at Midyear 2010 - Statistical Tables

NCJ Number
Date Published
April 2011

Presents data on numbers of jails and analyzes patterns of growth and decline in jail populations.


Presents data on numbers of jails as well as analyzes patterns of growth and decline in jail populations. These statistical tables include data on rated capacity of jails, percent of capacity occupied, and capacity added. They provide estimates of admissions to jails and detail the volume of movement among the jail population. This web document also includes total numbers for jail inmates by sex, race, and Hispanic origin. Standard errors for jail estimates are included.

  • Between midyear 2009 and midyear 2010, the confined inmate population in county and city jails (748,728) declined by 2.4% (18,706 inmates).
  • On June 30, 2010, adults represented 99% of all jail inmates. Males accounted for 87.7%, and females accounted for 12.3%.
  • The estimated rated capacity for all jail jurisdictions at midyear 2010 reached 866,782 beds, an increase of 2.0% (16,887 beds) from midyear 2009.

Date Modified: June 28, 2011

Miami-Dade County, FL, revised its rated capacity from 6,035 to 5,845. Los Angeles County, CA, noted that its 2008 and 2009 rated capacity was its operating capacity. In addition, the number of inmates in 2008 was revised to 785,533 from 785,536. These changes affected data in several tables and have been highlighted in the report. Percentage change in average daily population for 2010 in table 1 was misreported.

Date Published: April 14, 2011