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 on September 23, 2026.
Mifflin County, Pennsylvania, has about 46,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Mifflin County is held at the county jail, 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: Mifflin County public records, Mifflin County arrest records, Mifflin County warrants, Mifflin County criminal records, Mifflin County court records, Pennsylvania arrest records and Pennsylvania inmate search.
Finding Someone in Custody in Mifflin County
A person kept in custody after an arrest in Mifflin County is held at the county jail, whichever agency made the arrest.
SearchSystems opened and checked the custody page of the sheriff's office at mifflincountypa.gov/correctional-facility/inmate-lookup (page title: Mifflin County | Inmate Lookup), which answered when SearchSystems opened it on September 23, 2026.
That page is the place to look for someone booked recently. A person cited and released at the scene, or held only a few hours by a city department, will not be on it.
The Mifflin County Jail by the Numbers
On an average day in 2023 the jail held about 130 people, down from about 150 in 2019. Its rated capacity in 2023 was 169 beds, and it ran at 79 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Mifflin County has about 46,000 residents (2024 Census Bureau estimate), so the jail holds about 29 people for every 10,000 residents.
Who Books People Into the Mifflin County Jail
The agency that reports for Lewistown makes the arrests that end in a booking in Mifflin County.
The FBI's agency list also places one other agency, three state agencies and one state police unit in Mifflin County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Lewistown's 522 for 2025, Mifflin County Regional's 288 for 2025 and Granville Township's 98 for 2025.
Together, the four agencies in Mifflin County with all twelve months of 2025 on file reported 932 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 Mifflin 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 Mifflin County serves the sentence in a facility of the Pennsylvania Department of Corrections, whose inmate locator is at inmatelocator.cor.pa.gov.
Frequently Asked Questions
How do I find an inmate in Mifflin County?
Look on the custody page of the sheriff's office at mifflincountypa.gov. It covers people booked into the county jail.
How many people are in the Mifflin County jail?
About 130 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 169 beds.
Where do people sentenced to prison in Mifflin County go?
To a facility of the Pennsylvania Department of Corrections; its inmate locator is at inmatelocator.cor.pa.gov.
Is this the official Mifflin 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.