Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 24, 2026 and September 30, 2026.
Kuna, Idaho, in Ada County, has about 29,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Kuna is held at the county jail, run by the Ada County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Kuna public records, Ada County inmate search, Kuna arrest records, Kuna warrants, Kuna criminal records, Kuna court records, Idaho arrest records and Idaho inmate search.
Finding Someone in Custody in Kuna
A person kept in custody after an arrest in Kuna is held at the county jail, run by the Ada County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Ada County Sheriff's Office at apps.adacounty.id.gov/sheriff/reports/inmates.aspx (page title: Inmate Roster), phone (208) 577-3000, which answered when SearchSystems opened it on September 30, 2026.
Someone booked recently shows on that page; someone cited and released at the scene, or held a few hours at a city station, does not.
The Ada County Jail by the Numbers
On an average day in 2024 the jail held about 950 people, down from about 1,000 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,200 beds, and it ran at 82 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Ada County has about 536,000 residents (2024 Census Bureau estimate), so the jail holds about 18 people for every 10,000 residents.
Who Books People Into the Ada County Jail
The Ada County Sheriff's Office and the agencies that report for Boise City, Meridian and Garden City make the arrests that end in a booking in and around Kuna.
The largest arrest counts reported to the FBI were Boise City's 4,582 for 2025, the Ada County Sheriff's Office's 2,384 for 2025 and Meridian's 1,839 for 2025.
Together, the four agencies in Ada County with all twelve months of 2025 on file reported 9,391 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Kuna arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Idaho Department of Correction lists its inmates at idoc.idaho.gov/content/prisons/resident-client-search.
Frequently Asked Questions
How do I find an inmate in Kuna?
Look on the custody page of the Ada County Sheriff's Office at apps.adacounty.id.gov, or call (208) 577-3000. It covers people booked into the county jail.
How many people are in the Ada County jail?
About 950 on an average day in 2024, the latest year in the Vera Institute's jail data, against a rated capacity of 1,200 beds.
What is the phone number for the Ada County jail?
(208) 577-3000, the number on the page of the Ada County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Ada County go?
To a facility of the Idaho Department of Correction; its inmate locator is at idoc.idaho.gov.
Is this the official Kuna website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.