Based on a comparison of 55 countries in 2012, Russia ranked the highest in prison staff of adult prisons, penal or correctional institutions with 323,426 persons followed by China and Brazil. On the other end of the scale was Iceland with 101 persons, Malta with 180 persons and Luxembourg with 416 persons.
Data for more countries are available at Prison Staff of Adult Prisons, Penal or Correctional Institutions indicator page.
| Prison Staff of Adult Prisons, Penal or Correctional Institutions | Unit | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 |
| Algeria | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 16,896 | 17,811 | 18,835 | ... | ... | |||||
| Argentina | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 29,896 | 29,911 | 34,228 | 32,412 | ||
| Brazil | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 73,861 | 82,286 | 93,757 | ||
| Canada | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 23,641 | 24,460 | 24,724 | 27,257 | 27,583 | ... | ... | |||
| China | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | |
| Germany | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 36,823 | 36,940 | 37,180 | 36,684 | 36,813 | |||||
| Italy | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 48,737 | 48,230 | 46,120 | 45,784 | 45,196 | |||||
| Kenya | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 14,917 | 16,526 | 17,255 | 18,521 | 19,993 | |||
| Mexico | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 36,657 | 42,670 | ||
| Poland | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 26,742 | 28,149 | 29,468 | 30,389 | 30,410 | |||||
| Russia | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 322,720 | 322,323 | 322,751 | 315,935 | 325,926 | ... | |||
| Spain | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 21,576 | 27,052 | 28,575 | 29,968 | 30,518 | |||||
| Turkey | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 24,786 | 24,846 | 25,612 | 25,987 | 28,718 | ... | ||||
| Ukraine | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 47,771 | 45,828 | 44,635 | 45,808 | 46,267 | ... | ||||
| United Kingdom | persons | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | 50,677 | 51,591 | 52,431 | 51,374 | 50,096 |
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