Idaho Maximum Security Institution Inmate Custody
Idaho Maximum Security Institution, often shortened to IMSI, is operated by the Idaho Department of Correction. IDOC lists the facility at 13400 S. Pleasant Valley Road in Kuna with a capacity of 535. It opened in November 1989 and is described by IDOC as the prison for Idaho's most dangerous and volatile male residents. That description matters for Ada County inmate search because IMSI is not a booking jail, bond counter, or county detention branch.
The population is primarily close custody, administrative segregation, residents under sentence of death, and people assigned to secure mental-health custody through the Idaho Security Medical Program. A person may pass from Ada County Jail into IDOC after sentencing or after state custody is ordered, but the public record system changes at that point. The county roster covers people held by the Ada County Sheriff's Office. IMSI residents are searched through IDOC's statewide database.
Idaho Maximum Security Institution Inmate Lookup
The correct search tool is IDOC Resident/Client Search. IDOC says the database covers people under Idaho Department of Correction jurisdiction, including those incarcerated, on probation, or on parole. It can show felony listings for people serving time. Names of people who have served time and satisfied the sentence may still appear, but completed convictions may not display.
IDOC warns that location and status can change quickly. The search is updated daily, but it may not show a new location, current status, mailing address, or scheduled termination date at the exact moment a transfer occurs. If no mailing address is listed after a person has entered state custody, IDOC says to check again after arrival information is posted.
- Open the IDOC Resident/Client Search page.
- Search by last name, using at least the first two characters, or use at least the first three digits of an IDOC number.
- Review the result for status, birth year, and location before assuming the person is at IMSI.
- Use the facility page and IDOC service pages for visiting, mail, phone, and accounts after the location is confirmed.
| Search Field | Required | Use |
|---|---|---|
| Last Name | Required unless IDOC number is used | Partial search accepted with at least two characters. |
| First Name | No | Narrows common names. |
| IDOC Number | Required unless last name is used | Partial search accepted with at least three digits. |
| Status and Location | N/A | May show in custody, in community, discharged date, active bench warrant, and facility or mailing data. |
Idaho Maximum Security Institution Contact
Contact details should be used for facility questions after the IDOC locator confirms the person is housed at IMSI. County jail bond rules, Ada County inmate roster disclaimers, and Ada County GettingOut public video visit rules do not control this prison. Questions about sentence status, prison visiting, mail format, resident accounts, and facility alerts should start with IDOC sources.
Idaho Maximum Security Institution
13400 S. Pleasant Valley Road
Kuna, ID 83634
208-338-1635
Mailing address: Idaho State Maximum Institution, PO Box 51, Boise, ID 83707
Idaho Maximum Security Institution Record Source
The official IDOC IMSI page is the source for the facility name, address, capacity, opening history, and population description used for this Ada County state-prison page.
The screenshot is useful because it separates the prison's IDOC details from the Ada County Jail roster, which does not search sentenced IMSI residents.
Idaho Maximum Security Institution Visiting
Visiting at IMSI follows IDOC visiting rules, not Ada County Jail public video visiting. Prison visits generally require the resident's approved visiting process, IDOC scheduling rules, and compliance with facility security rules. IMSI visiting can be affected by the type of custody involved, including close custody, administrative segregation, secure mental-health placement, or emergency facility conditions.
IDOC facility pages warn that visiting schedules can change for emergency situations. That warning is especially important for a maximum-security prison because movement restrictions, lockdowns, medical issues, and classification status may affect whether a resident can receive visits. Confirm the current schedule and approval status through IDOC before travel.
| Visit Issue | IMSI Rule Path | Why It Matters |
|---|---|---|
| Public family visits | IDOC visiting process | Approval and scheduling are controlled by IDOC. |
| Emergency changes | Facility alerts and schedule notices | Close-custody operations can change access quickly. |
| Professional contact | IDOC facility procedure | Not handled through Ada County Jail VVS. |
| County jail video visits | Not applicable | GettingOut rules from Ada County Jail do not apply to IMSI residents. |
Idaho Maximum Security Institution Mail and Money
IDOC resident services control mail, resident accounts, and phone access. Use the IDOC mail guidelines for address formatting and allowed materials, the resident accounts page for money rules, and phone services for calls and kiosk information. IMSI mail should not be sent under Ada County Jail's Phoenix, Maryland scanning format.
Because IMSI houses high-security male residents, mail and property controls should be read with care. IDOC rules are the source for what can be mailed, how resident funds are handled, and how phone access is maintained. Ada County commissary balances, iCare package rules, jail bond payment rules, and sheriff's office lobby payment instructions apply to county jail custody, not to IMSI prison custody.
| Service | Use for IMSI | Do Not Use |
|---|---|---|
| IDOC mail guidelines and IMSI mailing address | Ada County Jail Phoenix mail-scanning address | |
| Money | IDOC resident account process | Ada County Jail lobby kiosk or jail commissary rules |
| Phone | IDOC phone services | Ada County Jail phone account instructions |
Idaho Maximum Security Institution and Ada County Records
Ada County has a dense custody map. The Ada County Jail handles local arrest booking, pretrial detention, warrant holds, and short jail sentences. IMSI is part of the Idaho prison system. Once a person moves into IDOC custody, the public search path changes from the sheriff's jail roster to IDOC Resident/Client Search. That difference prevents common mistakes when someone disappears from a county roster after sentencing.
For county booking records, use Ada County jail inmate records. For the overall local and state custody split, the Ada County inmate population page explains why the Boise and Kuna prison footprint is separate from the sheriff's jail count. VINELink may be useful for some Idaho custody notifications, but Idaho parole materials note that IDOC VINE services are not active while restoration work is underway, so IDOC Resident/Client Search is the direct current-location source for state residents.
Note: Confirm IDOC location and visiting status before travel because maximum-security schedules can change without matching a county roster update.