Idaho's prison system is a study in contrasts: a politically conservative state that nevertheless grapples with one of the highest per-capita imprisonment rates in the Mountain West. The Idaho Department of Correction (IDOC) holds approximately 7,343 people in state prison — an imprisonment rate of 398 per 100,000 residents, above the national average. Idaho's correctional challenges include significant reliance on private prisons, an aging infrastructure, and a rapidly growing prison population driven in part by methamphetamine and opioid offenses.
Idaho Department of Correction (IDOC)
The Idaho Department of Correction operates 9 state prisons and correctional centers in Idaho, as well as contract beds in private facilities and out-of-state placements. IDOC is headquartered in Boise and operates a range of community supervision programs managing the 5,967 individuals currently on parole and 27,418 on probation statewide.
Idaho contracts with private prison operators for a portion of its capacity: approximately 727 individuals in privately operated facilities. Historically, Idaho has used CoreCivic's Idaho Correctional Center (ICC) in Kuna for a significant portion of its incarcerated population — a relationship that became deeply controversial in the early 2010s.
History of Idaho Corrections
Idaho's correctional history began with territorial status. The Idaho State Penitentiary in Boise, established in 1872, served as Idaho's primary correctional institution for over a century. Built of sandstone quarried by inmates, the Old Penitentiary — as it's now known — operated until 1973 and is today a National Historic Landmark and museum. The old prison is notable for its gallows (executions by hanging), solitary confinement cell blocks, and Women's Ward, which housed female prisoners in often brutal conditions.
The facility was closed in 1973 following a major riot, replaced by the Idaho State Correctional Institution (ISCI) in Boise, which became the hub of the modern Idaho prison system. ISCI and subsequent facilities have been the site of ongoing tensions over overcrowding, conditions, and healthcare access.
The Idaho Correctional Center Scandal
The most significant recent controversy in Idaho corrections centered on the Idaho Correctional Center (ICC), a CoreCivic-operated private prison in Kuna. A 2010 class-action lawsuit — Balla v. Idaho Department of Correction — documented extraordinary levels of violence at ICC, earning it the nickname "Gladiator School" in media coverage. The lawsuit alleged that CoreCivic systematically understaffed the facility, that gang-controlled violence was pervasive, and that the assault rate was four times higher than at state-operated facilities.
The litigation resulted in a settlement in 2014 requiring increased staffing levels, enhanced violence prevention programs, and ongoing independent monitoring. The "Gladiator School" investigation — which included undercover footage and testimony from inmates and staff — became one of the most publicized examples of private prison mismanagement in American history and contributed to national debates about private prison accountability.
Scale of Incarceration in Idaho
- 11,593 total incarcerated (prison + jail)
- 7,343 in IDOC state prisons
- 4,250 in county jails
- 398 per 100,000 imprisonment rate
- 27,418 on probation
- 5,967 on parole
- 6,328 men and 1,015 women in IDOC custody
- 727 in private prison facilities
Life Sentences in Idaho
Idaho holds 673 individuals serving life sentences — approximately 9.2% of the state prison population. Of these, 130 are serving Life Without the Possibility of Parole (LWOP). Idaho imposes LWOP for first-degree murder in certain circumstances and for repeat violent offenders.
Idaho retains the death penalty. The state has carried out three executions in the modern era (post-1976), most recently in 2011. Idaho Death Row is housed at the Idaho Maximum Security Institution (IMSI) in Kuna.
Major IDOC Facilities
- Idaho Maximum Security Institution (IMSI, Kuna): The state's highest-security prison, housing Idaho's Death Row and the most dangerous or management-problem inmates.
- Idaho State Correctional Institution (ISCI, Boise): The state's largest facility and primary intake point for new admissions. Houses multiple security levels.
- Idaho Correctional Center (ICC, Kuna): The CoreCivic private prison that was the subject of the "Gladiator School" litigation. Now operates under enhanced oversight requirements.
- South Idaho Correctional Institution (SICI, Boise): A medium-security facility adjacent to ISCI.
- Pocatello Women's Correctional Center (PWCC): Idaho's primary women's facility in eastern Idaho.
IDOC Programs and Reentry
- Education: Adult education, GED, and vocational training in areas including welding, carpentry, construction trades, and computer skills.
- Substance Abuse Treatment: Methamphetamine and opioid use are significant drivers of Idaho's prison population. IDOC operates residential treatment units and outpatient programming at multiple facilities.
- Cognitive Behavioral Programs: Thinking for a Change, Moral Reconation Therapy, and other evidence-based programs targeting criminal thinking and behavior.
- Reentry: IDOC's Division of Probation and Parole coordinates pre-release planning, ID procurement, and community referrals. The department works with community organizations in Boise, Twin Falls, and Pocatello to support returning individuals.
- Community Work Centers: Minimum-security work centers in several Idaho cities allow inmates nearing release to work in the community while remaining in custody, providing a gradual transition.
Resources for Families of Idaho Inmates
- Inmate search: IDOC's Offender Search at idoc.idaho.gov allows searches by name or IDOC number. Shows current facility and expected release information.
- Visitation: Visiting procedures vary by facility. Visitors must pre-register and carry valid ID. Check idoc.idaho.gov for visiting rules at specific facilities.
- Mail: Address to: [Inmate Name, IDOC #], [Facility Name], [Address]. All non-legal mail is inspected.
- Phone: GTL/Aventiv manages IDOC phone services. Families can set up prepaid accounts.
- Money: JPay or money order. Use the inmate's IDOC number.
Firing Squad and Recent IDOC Developments
Idaho has been developing a remote firing squad execution method designed to minimize direct staff involvement, with plans to make the firing squad the primary execution method. The state is among a small group of states reviving this method as lethal injection drug supplies have become unreliable.
IDOC faced significant resource pressure in recent years: unobligated cash balances declined from $20.8 million (FY2023) to $3.6 million (FY2025), largely due to the loss of inmate labor contracts. The prison population reached 9,938 — straining capacity. The IDOC Parole Commission saw significant leadership instability, with four of seven commissioners leaving within a single year. A 2026 Timely Release Report flagged systemic problems with ensuring inmates are released on their correct date — an issue that affects both individuals and department credibility.
On the positive side, IDOC's reentry philosophy — "Reentry starts the first day that someone arrives at IDOC" — has produced notable programs including the Inmate Dog Alliance Program of Idaho (IDAPI) at ISCI, which pairs inmates with shelter dogs for training and adoption, and the Free2Succeed mentorship program in which formerly incarcerated individuals mentor current inmates.
Services for Families of Idaho Inmates
If you have a loved one incarcerated in a Idaho prison or county jail, AllRecentArrests.us offers four services to help you stay connected and support them:
- Post bail bonds — If your loved one is awaiting trial in a Idaho county jail, connect with a licensed bail agent who can help secure pretrial release for typically 10% of the bail amount.
- Send letters and photos — Write from your phone or computer; we handle printing, formatting to Idaho DOC rules, postage, and delivery so your mail passes inspection.
- Send care packages — Choose from facility-approved snacks, hygiene items, and essentials filtered to what is actually allowed at your inmate's specific Idaho facility.
- Discounted phone calls — Reduce the cost of inmate calls from Idaho facilities using a local routing number that bypasses the long-distance rates typically charged by facility phone providers.