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 23, 2026.
Trempealeau County, Wisconsin, has about 31,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Trempealeau County is held at the county jail, run by the Trempealeau 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: Trempealeau County public records, Trempealeau County arrest records, Trempealeau County warrants, Trempealeau County criminal records, Trempealeau County court records, Wisconsin arrest records and Wisconsin inmate search.
Finding Someone in Custody in Trempealeau County
The county jail, run by the Trempealeau County Sheriff's Office, holds everyone kept in custody after an arrest in Trempealeau County, from every agency.
SearchSystems opened and checked the custody page of the Trempealeau County Sheriff's Office at co.trempealeau.wi.us/departments/court___legal_departments/sheriffs... (page title: Trempealeau County), phone (715) 538-4509, 18600, Monday - Friday 8:00 AM - 4:30 PM, which answered when SearchSystems opened it on September 23, 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 Trempealeau County Jail by the Numbers
On an average day in 2025 the jail held about 59 people, up from about 24 in 2019. Its rated capacity in 2025 was 78 beds, and it ran at 76 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Trempealeau County has about 31,000 residents (2024 Census Bureau estimate), so the jail holds about 19 people for every 10,000 residents.
Who Books People Into the Trempealeau County Jail
The Trempealeau County Sheriff's Office and the agencies that report for Arcadia, Trempealeau, Osseo, Galesville, Whitehall, Independence and three more cities make the arrests that end in a booking in Trempealeau County.
The largest arrest counts reported to the FBI were Osseo's 191 for 2020, Blair's 101 for 2019 and Arcadia's 81 for 2025.
Together, the three agencies in Trempealeau County with all twelve months of 2022 on file reported 222 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 Trempealeau 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 Wisconsin Department of Corrections lists its inmates at appsdoc.wi.gov/lop/welcome.
Frequently Asked Questions
How do I find an inmate in Trempealeau County?
Look on the custody page of the Trempealeau County Sheriff's Office at co.trempealeau.wi.us, or call (715) 538-4509. It covers people booked into the county jail.
How many people are in the Trempealeau County jail?
About 59 on an average day in 2025, the latest year in the Vera Institute's jail data, against a rated capacity of 78 beds.
What is the phone number for the Trempealeau County jail?
(715) 538-4509, the number on the page of the Trempealeau County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Trempealeau County go?
To a facility of the Wisconsin Department of Corrections; its inmate locator is at appsdoc.wi.gov/lop/welcome.
Is this the official Trempealeau 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.