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 28, 2026.
Grand Blanc, Michigan, in Genesee County, has about 7,900 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Grand Blanc is held at the county jail, run by the Genesee 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: Grand Blanc public records, Genesee County inmate search, Grand Blanc arrest records, Grand Blanc warrants, Grand Blanc criminal records, Grand Blanc court records, Michigan arrest records and Michigan inmate search.
Finding Someone in Custody in Grand Blanc
A person kept in custody after an arrest in Grand Blanc is held at the county jail, run by the Genesee County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Genesee County Sheriff's Office at gcsomichigan.com/corrections-division (page title: CORRECTIONS DIVISION | GCSO), phone 810-257-3426, 1002 South Saginaw Street, Flint, MI 48502, which answered when SearchSystems opened it on September 28, 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 810-257-3426.
The Genesee County Jail by the Numbers
On an average day in 2023 the jail held about 550 people, down from about 620 in 2019. Its rated capacity in 2023 was 580 beds, and it ran at 94 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Genesee County has about 402,000 residents (2024 Census Bureau estimate), so the jail holds about 14 people for every 10,000 residents.
Who Books People Into the Genesee County Jail
The Genesee County Sheriff's Office and the agency that reports for Grand Blanc (filed by the FBI as Grand Blanc Police Department) make the arrests that end in a booking in and around Grand Blanc.
The FBI's agency list also places two campus police departments, one state police unit and two other agencies in Genesee County (the arrest records guide names each one).
The Lennon Police Department is listed by the FBI across two counties including Genesee County, so its arrests are not broken out for Genesee County here.
The largest arrest counts reported to the FBI were Grand Blanc (township)'s 1,609 for 2023, Flint Township's 1,158 for 2025 and the Genesee County Sheriff's Office's 884 for 2025.
Together, the 21 agencies in Genesee County with all twelve months of 2025 on file reported 5,452 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 Grand Blanc arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Michigan Department of Corrections lists its inmates at mdocweb.state.mi.us/otis2.
Frequently Asked Questions
How do I find an inmate in Grand Blanc?
Ask the Genesee County Sheriff's Office at 810-257-3426; its jail page SearchSystems verified is at gcsomichigan.com/corrections-division.
How many people are in the Genesee County jail?
About 550 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 580 beds.
What is the phone number for the Genesee County jail?
810-257-3426, the number on the page of the Genesee County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Genesee 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 Grand Blanc 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.