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 October 9, 2026.
Twin Falls County, Idaho, has about 97,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Twin Falls County is held at the county jail, run by the Twin Falls 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: Twin Falls County public records, Twin Falls County arrest records, Twin Falls County warrants, Twin Falls County criminal records, Twin Falls County court records, Idaho arrest records and Idaho inmate search.
Finding Someone in Custody in Twin Falls County
A person kept in custody after an arrest in Twin Falls County is held at the county jail, run by the Twin Falls County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the Twin Falls County Sheriff's Office at roster.assurances.gov.gh/twin-falls-jail-roster-recent-bookings.html (page title: Twin Falls Jail Roster Recent Bookings), which answered when SearchSystems opened it on September 25, 2026.
That page is the place to look for someone booked recently. A person cited and released at the scene, or held only a few hours by a city department, will not be on it.
The Twin Falls County Jail by the Numbers
On an average day in 2019 the jail held about 300 people. Its rated capacity in 2019 was 196 beds, and it ran at 152 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Twin Falls County has about 97,000 residents (2024 Census Bureau estimate), so the jail holds about 31 people for every 10,000 residents.
Who Books People Into the Twin Falls County Jail
The Twin Falls County Sheriff's Office and the agencies that report for Twin Falls, Kimberly, Buhl and Filer make the arrests that end in a booking in Twin Falls County.
The largest arrest counts reported to the FBI were Twin Falls's 1,552 for 2025, the Twin Falls County Sheriff's Office's 548 for 2025 and Kimberly's 80 for 2025.
Together, the five agencies in Twin Falls County with all twelve months of 2025 on file reported 2,287 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 Twin Falls County 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 Twin Falls 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 Twin Falls County?
Look on the custody page of the Twin Falls County Sheriff's Office at roster.assurances.gov.gh. It covers people booked into the county jail.
How many people are in the Twin Falls County jail?
About 300 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 196 beds.
Where do people sentenced to prison in Twin Falls County go?
To a facility of the Idaho Department of Correction; its inmate locator is at idoc.idaho.gov.
Is this the official Twin Falls County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.