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 28, 2026.
Idaho Falls, Idaho, in Bonneville County, has about 70,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Idaho Falls is held at the county jail, run by the Bonneville 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: Idaho Falls public records, Bonneville County inmate search, Idaho Falls arrest records, Idaho Falls warrants, Idaho Falls criminal records, Idaho Falls court records, Idaho arrest records and Idaho inmate search.
Finding Someone in Custody in Idaho Falls
A person kept in custody after an arrest in Idaho Falls is held at the county jail, run by the Bonneville County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Bonneville County Sheriff's Office at bonnevillecountyidaho.gov/administration/sheriff (page title: Sheriff | Bonneville County), which answered when SearchSystems opened it on September 28, 2026.
That page is the office's jail information page rather than a roster.
The Bonneville County Jail by the Numbers
On an average day in 2023 the jail held about 340 people, down from about 370 in 2019. Its rated capacity in 2023 was 533 beds, and it ran at 64 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Bonneville County has about 134,000 residents (2024 Census Bureau estimate), so the jail holds about 25 people for every 10,000 residents.
Who Books People Into the Bonneville County Jail
The Bonneville County Sheriff's Office and the agency that reports for Idaho Falls (filed by the FBI as Idaho Falls Police Department) make the arrests that end in a booking in and around Idaho Falls.
The largest arrest counts reported to the FBI were Idaho Falls's 2,255 for 2025 and the Bonneville County Sheriff's Office's 999 for 2025.
Together, the two agencies in Bonneville County with all twelve months of 2025 on file reported 3,254 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 Idaho Falls arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Bonneville County serves the sentence in a facility of the Idaho Department of Correction, whose inmate locator is at idoc.idaho.gov/content/prisons/resident-client-search.
Frequently Asked Questions
How do I find an inmate in Idaho Falls?
Ask the Bonneville County Sheriff's Office; its jail page SearchSystems verified is at bonnevillecountyidaho.gov.
How many people are in the Bonneville County jail?
About 340 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 533 beds.
Where do people sentenced to prison in Bonneville County go?
To a facility of the Idaho Department of Correction; its inmate locator is at idoc.idaho.gov.
Is this the official Idaho Falls 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.