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 28, 2026.
McClain County, Oklahoma, has about 48,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in McClain County is held at the county jail, run by the McClain 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: McClain County public records, McClain County arrest records, McClain County warrants, McClain County police reports, McClain County property records, Oklahoma arrest records and Oklahoma inmate search.
Finding Someone in Custody in McClain County
The county jail, run by the McClain County Sheriff's Office, holds everyone kept in custody after an arrest in McClain County, from every agency.
SearchSystems opened and checked the custody page of the McClain County Sheriff's Office at mcclaincountysheriff.com/inmate-search (page title: Inmate Search | McClain County Sheriff's Office), phone 877-654-8463, which answered when SearchSystems opened it on September 24, 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 McClain County Jail by the Numbers
On an average day in 2024 the jail held about 65 people, down from about 140 in 2019. Its rated capacity in 2020, the last year with a capacity figure, was 56 beds, and it ran at 147 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
McClain County has about 48,000 residents (2024 Census Bureau estimate), so the jail holds about 13 people for every 10,000 residents.
Who Books People Into the McClain County Jail
The McClain County Sheriff's Office and the agencies that report for Newcastle, Blanchard, Purcell, Dibble and Washington make the arrests that end in a booking in McClain County.
The Maysville Police Department is listed by the FBI across two counties including McClain County, so its arrests are not broken out for McClain County here.
The largest arrest counts reported to the FBI were Purcell's 104 for 2025, Blanchard's 69 for 2025 and the McClain County Sheriff's Office's 60 for 2025.
Together, the six agencies in McClain County with all twelve months of 2025 on file reported 304 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 McClain 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 McClain County serves the sentence in a facility of the Oklahoma Department of Corrections, whose inmate locator is at okoffender.doc.ok.gov.
Frequently Asked Questions
How do I find an inmate in McClain County?
Look on the custody page of the McClain County Sheriff's Office at mcclaincountysheriff.com/inmate-search, or call 877-654-8463. It covers people booked into the county jail.
How many people are in the McClain County jail?
About 65 on an average day in 2024, the latest year in the Vera Institute's jail data, against a rated capacity of 56 beds.
What is the phone number for the McClain County jail?
877-654-8463, the number on the page of the McClain County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in McClain County go?
To a facility of the Oklahoma Department of Corrections; its inmate locator is at okoffender.doc.ok.gov.
Is this the official McClain 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.