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.
Lyon County, Iowa, has about 12,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Lyon County is held at the county jail, run by the Lyon 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: Lyon County public records, Lyon County arrest records, Lyon County warrants, Lyon County criminal records, Lyon County court records, Iowa arrest records and Iowa inmate search.
Finding Someone in Custody in Lyon County
A person kept in custody after an arrest in Lyon County is held at the county jail, run by the Lyon County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Lyon County Sheriff's Office at lyoncounty.iowa.gov/sheriff/jail (page title: Jail | Sheriff | Lyon County, Iowa), phone 712-472-8356, Tuesday 7:00 p.m. - 7:40 p.m., which answered when SearchSystems opened it on September 30, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at 712-472-8356.
The Lyon County Jail by the Numbers
On an average day in 2021 the jail held about 4 people, down from about 15 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 27 beds, and it ran at 56 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Lyon County has about 12,000 residents (2024 Census Bureau estimate), so the jail holds about 3 people for every 10,000 residents.
Who Books People Into the Lyon County Jail
The Lyon County Sheriff's Office makes the arrests that end in a booking in Lyon County.
The Lyon County Sheriff's Office reported 144 arrests to the FBI for 2025. 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 Lyon 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 Iowa Department of Corrections lists its inmates at doc.iowa.gov/inmate-family-services.
Frequently Asked Questions
How do I find an inmate in Lyon County?
Ask the Lyon County Sheriff's Office at 712-472-8356; its jail page SearchSystems verified is at lyoncounty.iowa.gov/sheriff/jail.
How many people are in the Lyon County jail?
About 4 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 27 beds.
What is the phone number for the Lyon County jail?
712-472-8356, the number on the page of the Lyon County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Lyon County go?
To a facility of the Iowa Department of Corrections; its inmate locator is at doc.iowa.gov/inmate-family-services.
Is this the official Lyon 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.