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 28, 2026 and October 2, 2026.
St. Clair County, Missouri, has about 9,800 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in St. Clair County is held at the county jail, run by the St. Clair 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: St. Clair County public records, St. Clair County arrest records, St. Clair County warrants, St. Clair County criminal records, St. Clair County court records, Missouri arrest records and Missouri inmate search.
Finding Someone in Custody in St. Clair County
A person kept in custody after an arrest in St. Clair County is held at the county jail, run by the St. Clair County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the St. Clair County Sheriff's Office at stclaircomo.com/sheriff (page title: Sheriff | St. Clair County MO), phone 417-646-2522, a site that blocks automated checks (HTTP 403), so open it in a browser.
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 417-646-2522.
The St. Clair County Jail by the Numbers
On an average day in 2019 the jail held about 140 people. Its rated capacity in 2019 was 147 beds, and it ran at 93 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
St. Clair County has about 9,800 residents (2024 Census Bureau estimate), so the jail holds about 138 people for every 10,000 residents.
Who Books People Into the St. Clair County Jail
The St. Clair County Sheriff's Office and the agencies that report for Appleton City, Osceola and Lowry City make the arrests that end in a booking in St. Clair County.
The largest arrest counts reported to the FBI were the St. Clair County Sheriff's Office's 56 for 2025, Osceola's 7 for 2025 and Appleton City's 0 for 2025.
Together, the three agencies in St. Clair County with all twelve months of 2025 on file reported 63 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 St. Clair 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 St. Clair County serves the sentence in a facility of the Missouri Department of Corrections, whose inmate locator is at web.mo.gov/doc/offSearchWeb.
Frequently Asked Questions
How do I find an inmate in St. Clair County?
Ask the St. Clair County Sheriff's Office at 417-646-2522; its jail page SearchSystems verified is at stclaircomo.com/sheriff.
How many people are in the St. Clair County jail?
About 140 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 147 beds.
What is the phone number for the St. Clair County jail?
417-646-2522, the number on the page of the St. Clair County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in St. Clair County go?
To a facility of the Missouri Department of Corrections; its inmate locator is at web.mo.gov/doc/offSearchWeb.
Is this the official St. Clair 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.