Ada County Inmate Population Search

Ada County Inmate Population Overview

The Ada County inmate population is not one list. The local list is the Ada County Inmate Roster, operated by the Ada County Sheriff's Office for people housed in the Ada County Jail for criminal offenses. That roster excludes juveniles, updates every 24 hours, and warns that current status must be confirmed by phone or in person. The county jail population includes adult pretrial detainees, sentenced jail inmates, warrant holds, return-to-custody holds, and some Community Transition Center participants.

Ada County is unusual because the county also contains a large Idaho Department of Correction locations footprint. State prisons and reentry centers in Kuna and Boise hold sentenced IDOC residents, retained-jurisdiction residents, reception and diagnostic residents, close-custody residents, and minimum-custody reentry residents. Those people are not searched through the county jail roster. The IDOC Resident/Client Search is the correct tool once a person is under IDOC jurisdiction.

Ada County Inmate Population Statistics

The main county figure for the Ada County inmate population is the jail daily average population published by ACSO. The 2024 annual report lists a 2024 jail daily average population of 939, down from 999 in 2023 and 1,019 in 2022. The jail page and ACSO annual-report material describe the facility as having 1,116 beds. The Idaho Sheriffs' Association directory separately lists Ada County rated capacity as 1,049 and ADP as 780, so capacity references should name the source.

The official Ada County Jail page is the county source for beds, housing, bond, and classification details. The screenshot from the Ada County Jail overview matches the facility source used for the bed count and custody description.

That jail source is separate from the live roster, which is why the population count and the person-by-person custody search should be read together but not treated as the same record.

Ada County Inmate Population Trends

ACSO's annual-report trend shows that the Ada County inmate population stayed near one thousand people in jail daily for several years, then fell in 2024. The county population used by ACSO rose across the same period. That means the jail count did not move in a straight line with county growth. Court processing, release decisions, pretrial supervision, warrants, and IDOC transfers all affect the daily count.

Longer historical context from the Vera Institute shows Ada County's jail system growing from a small 1970s facility into a roughly thousand-person jail system. Vera estimates are harmonized and sometimes fractional, so ACSO annual reports are better for current county operating figures. Vera is useful for scale, not for confirming today's custody status.

Ada County Jail Capacity

The Ada County inmate population must be read against building capacity. ACSO says the jail opened in 1977 with 160 inmate beds plus 32 work-release beds, then expanded into a 1,116-bed jail. Housing now includes minimum-security dorms, male medium-security units, an 88-bed maximum-security unit, Health Services housing, and closed custody. The Community Transition Center adds 100 beds for selected people near release, split 68 men and 32 women.

Capacity pressure is a local issue. The 2023 ACSO annual report described close to 1,000 in-custody inmates per day in a 1,116-bed facility and said key infrastructure was designed for a much smaller jail. The same report described a proposed $49 million bond for a new 294-bed dorm and infrastructure upgrades. BoiseDev reported the bond received 65.8 percent support but missed Idaho's two-thirds threshold.

Ada County Inmate Population Makeup

Detailed current ACSO demographic tables by race, age band, sex, charge level, or pretrial status were not located in the annual-report text inspected for this build. The most useful current local distinction is custody type: Ada County Jail houses current adult jail custody, the Community Transition Center serves selected jail inmates near release, and IDOC facilities hold sentenced state residents and reentry residents.

Safety and Justice Challenge material identifies pretrial detention as a major driver in Ada County and describes efforts such as court reminders, pretrial risk assessments, case-processing work, and behavioral-health resources. That context helps explain why jail population can change even when the jail building does not.

Ada County Inmate Record Laws

Idaho law and jail standards shape which Ada County inmate population records exist and which records can be released. The sheriff has charge of the county jail and prisoners, jail standards require intake records and classification records, and Idaho public-records law gives a route to request records that are not online. Law-enforcement exemptions still matter because open investigations, fair-trial concerns, victim and witness data, juvenile records, and investigative techniques can limit release.

Search Ada County Inmate Population

The most direct lookup for current Ada County Jail custody is the official roster at apps.adacounty.id.gov. The form is narrow. It accepts the first letter or first several letters of the person's last name, then returns public result fields such as mugshot, name, JID number, age, arresting agency, charge rows, type, bail, and VINE registration links when available. It does not show full date of birth, housing unit, court date, projected release date, or statute numbers on roster charge rows.

1. Open the Ada County Inmate Roster and read the timestamp and status disclaimer.
2. Type the first letter or first several letters of the last name. The field cannot be blank.
3. Select Search and compare name, JID number, age, arresting agency, charges, and bail values.
4. Use the VINE link in the result if custody-status notices are needed.
5. If the person does not appear, check Current Arrests, call 208-577-3000, or use the ACSO public-records process.

The roster screenshot from the official Ada County inmate roster shows the last-name-prefix search and the county status disclaimer.

That limited search field is important. A common name should be checked against visible age, JID, arresting agency, and charge details before relying on a match.

Ada County Current Arrests

The Current Arrests report is often better for very recent bookings because it has Last 4 Hours, Last 24 Hours, and Last 5 Days views. It also shows arrest date and time, status, agency, severity, charge, statute, and type. The main inmate roster does not show arrest date/time or statute numbers. For a new arrest, start with Current Arrests, then move to the roster after the daily update catches up.

Ada County Inmate Record Fields

An Ada County inmate record is useful, but it is not a full court file. The roster shows custody and charge information tied to the jail record. Formal court charges, hearings, filings, and dispositions are searched in Idaho iCourt after the prosecutor and court process the case. A roster charge can later be amended, dismissed, reduced, or replaced by a formal court charge.

Note: Roster records do not show housing unit, full DOB, court date, projected release date, or juvenile custody records.

Ada County Jail vs IDOC

Ada County Jail and IDOC serve different legal stages. The county jail is the local booking and detention system for adult criminal custody. IDOC is the state correctional system for residents under state jurisdiction, including prison, probation, parole, and community reentry. A person can appear on the county roster after arrest, then disappear from it after release or transfer to IDOC.

The IDOC search image from the Resident/Client Search shows why state custody should be checked by last name or IDOC number instead of by the Ada County jail roster.

IDOC updates daily but warns that status and location can change quickly, so a listed prison location may lag during transfer.

Ada County Booking Records

For older booking records, Ada-only arrest history, incident reports, or mugshots not visible online, use the ACSO public-records process. ACSO accepts online requests through its Laserfiche form and written requests mailed or brought to the Public Safety Information Center at 7200 Barrister Drive in Boise. The records page asks for complete names and dates of birth when requesting records about an individual.

ACSO states that many requests take 3 to 10 business days and may involve a charge for larger requests. Idaho Attorney General guidance notes that post-July 1, 2024 response timing can be longer for nonresidents. ACSO can provide an individual's Ada County arrest history only for people booked into the Ada County Jail. It cannot provide a statewide arrest history. For statewide criminal-history checks, ACSO routes people to Idaho State Police BCI.

Ada County Detention Facilities

Ada County custody searches depend on the facility and operator. The Ada County Jail and Community Transition Center are local sheriff systems. The Kuna and Boise prison and reentry facilities are IDOC systems. No official BOP institution or ICE detention facility was identified in Ada County, but federal and immigration locators still matter if a person leaves county custody.

• Ada County Jail - adult pretrial detainees, sentenced jail inmates, warrant holds, return-to-custody holds, and jail classification housing.
• Ada County Community Transition Center - selected sentenced jail inmates preparing for work search, employment, classes, and release.
• Idaho Maximum Security Institution - sentenced male IDOC residents, close custody, death sentence, and secure mental-health placements.
• Idaho State Correctional Center - sentenced male residents in minimum, medium, and close custody.
• Idaho State Correctional Institution - male medium-security residents plus reception and diagnostic functions.
• Mountain View Transformation Center - male IDOC residents in a state correctional treatment or placement setting.
• South Boise Women's Correctional Center - female retained-jurisdiction Rider residents.
• South Idaho Correctional Institution - male and female sentenced residents, pre-release residents, work crews, and Correctional Industries workers.
• Treasure Valley Community Reentry Center - male minimum-custody IDOC residents nearing release.
• East Boise Community Reentry Center - female minimum-custody IDOC residents in community reentry.

Ada County Jail Programs

Programs also affect the Ada County inmate population because some people move through the Community Transition Center instead of staying in ordinary jail housing. ACSO offers Active Behavioral Change, Substance Abuse Program, and Workforce Readiness in both the jail and CTC, with different curriculum lengths. Entry can come through court order, probation terms, or self-referral. Eligibility depends on classification level, discipline history, housing, time left to serve, and funding.

Classification

Jail risk assessment that helps decide housing level and privileges.

Detainer

A hold or request from another agency that may block release.

Return to custody

A roster type tied to an order or supervision status requiring custody.

CTC

Ada County Community Transition Center, used for selected jail inmates near release.

Health Services is also part of custody management. ACSO describes a 24/7 on-site medical facility, full-time mental-health providers, emergency dental care, and medical or mental-health housing outside general population. The jail became PREA-certified in October 2016 and has a zero-tolerance policy for sexual assault or misconduct.

Ada County Inmate Population FAQ

How large is the Ada County inmate population? ACSO reported a 2024 jail daily average population of 939. The county also has a 100-bed Community Transition Center and several IDOC prisons or reentry centers in Ada County, but those IDOC residents are counted under state custody, not the county jail roster.

How do I search the Ada County inmate population? Use the Ada County Inmate Roster for current jail custody. For very recent bookings, use Current Arrests. For sentenced state residents, use IDOC Resident/Client Search. For federal or immigration custody, use BOP or ICE tools.

Why does the roster not show a person? The roster excludes juveniles, updates every 24 hours, and only covers people housed in Ada County Jail for criminal offenses at the displayed timestamp. A person may be newly booked, released, transferred to IDOC, in another county, in federal custody, or not in custody.

Can VINELink be used in Idaho? VINELink and VINE are documented for Idaho custody and court notifications, and roster records may include VINE links. Idaho parole information currently warns that IDOC VINE services are not active during restoration, so IDOC Resident/Client Search remains necessary for state locations.