Here's some figures from 1996 The U.S. Prison Industry Number of correctional facilities: 1500 Cost to run the prisons and jails in all 50 states and the federal prison system: $49 billion Average cost to incarcerate a prisoner for a year: $20,142 Average cost to incarcerate a prisoner per day: $55.18 Prison expenditure per prisoner per day in Alabama: $21.88 Prison expenditure per prisoner per day in Minnesota: $103.63 http://www.prisonpolicy.org/prisonindex/prisonindustry.html In Canada - 2004/2005 Number of Prisons in Canada 190 prisons,76 federal, 114 provincial/territorial. The Costs of Incarceration Correctional services expenditures totalled $2.8 billion Cost of incarcerating a Federal prisoner: $259.05 per prisoner/per day Cost of incarcerating a Federal female prisoner: $150,000-$250,000 per prisoner/per year Cost of incarcerating a Federal male prisoner: $87,665 per prisoner/per year Cost of incarcerating a provincial prisoner: $141.78: per prisoner/per day The cost of alternatives such as probation, bail supervision and community supervision range from $5-$25/day. http://www.prisonjustice.ca/politics/facts_stats.html

$80.00 a day

I'm pretty sure it's at 58$ a day