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 on September 24, 2026.
Custer County, Idaho, has about 4,600 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Custer County is held at the county jail, run by the Custer 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: Custer County public records, Custer County arrest records, Custer County warrants, Custer County criminal records, Custer County court records, Idaho arrest records and Idaho inmate search.
Finding Someone in Custody in Custer County
The county jail, run by the Custer County Sheriff's Office, holds everyone kept in custody after an arrest in Custer County, from every agency.
SearchSystems opened and checked the custody page of the Custer County Sheriff's Office at custercountysheriff.com/inmate-search (page title: Inmate Search | Custer County Sheriff's Office), phone 877-654-8463, which answered when SearchSystems opened it on September 24, 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 Custer County Jail by the Numbers
On an average day in 2019 the jail held about 4 people. Its rated capacity in 2019 was 8 beds, and it ran at 50 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Custer County has about 4,600 residents (2024 Census Bureau estimate), so the jail holds about 9 people for every 10,000 residents.
Who Books People Into the Custer County Jail
The Custer County Sheriff's Office and the agency that reports for Challis make the arrests that end in a booking in Custer County.
The largest arrest counts reported to the FBI were the Custer County Sheriff's Office's 35 for 2025 and Challis's 12 for 2025.
Together, the two agencies in Custer County with all twelve months of 2025 on file reported 47 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 Custer County 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 Custer County?
Look on the custody page of the Custer County Sheriff's Office at custercountysheriff.com/inmate-search, or call 877-654-8463. It covers people booked into the county jail.
How many people are in the Custer County jail?
About 4 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 8 beds.
What is the phone number for the Custer County jail?
877-654-8463, the number on the page of the Custer County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Custer County go?
To a facility of the Idaho Department of Correction; its inmate locator is at idoc.idaho.gov.
Is this the official Custer 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.