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 23, 2026 and September 30, 2026.
Owosso, Michigan, in Shiawassee County, has about 15,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Owosso is held at the county jail, run by the Shiawassee 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: Owosso public records, Shiawassee County inmate search, Owosso arrest records, Owosso warrants, Owosso criminal records, Owosso court records, Michigan arrest records and Michigan inmate search.
Finding Someone in Custody in Owosso
A person kept in custody after an arrest in Owosso is held at the county jail, run by the Shiawassee County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Shiawassee County Sheriff's Office at sheriff.shiawassee.net/jail (page title: Inmate Jail Services | Shiawassee County Sheriff's Office), phone 989-743-2230, 201 E. McArthur St. Corunna MI 48817, MONDAY THROUGH FRIDAY FROM 9:00AM TO 11:00AM, which answered when SearchSystems opened it on September 23, 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 989-743-2230.
The Shiawassee County Jail by the Numbers
On an average day in 2019 the jail held about 120 people. Its rated capacity in 2019 was 120 beds, and it ran at 100 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Shiawassee County has about 68,000 residents (2024 Census Bureau estimate), so the jail holds about 18 people for every 10,000 residents.
Who Books People Into the Shiawassee County Jail
The Shiawassee County Sheriff's Office and the agency that reports for Owosso (filed by the FBI as Owosso Police Department) make the arrests that end in a booking in and around Owosso.
The FBI's agency list also places one more agency in Shiawassee County: the Shiawassee County State Police (state police).
The largest arrest counts reported to the FBI were the Shiawassee County Sheriff's Office's 476 for 2025, Owosso's 295 for 2025 and Durand's 49 for 2025.
Together, the seven agencies in Shiawassee County with all twelve months of 2025 on file reported 858 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 Owosso 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 Shiawassee County serves the sentence in a facility of the Michigan Department of Corrections, whose inmate locator is at mdocweb.state.mi.us/otis2.
Frequently Asked Questions
How do I find an inmate in Owosso?
Ask the Shiawassee County Sheriff's Office at 989-743-2230; its jail page SearchSystems verified is at sheriff.shiawassee.net/jail.
How many people are in the Shiawassee County jail?
About 120 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 120 beds.
What is the phone number for the Shiawassee County jail?
989-743-2230, the number on the page of the Shiawassee County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Shiawassee County go?
To a facility of the Michigan Department of Corrections; its inmate locator is at mdocweb.state.mi.us/otis2.
Is this the official Owosso website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.