Reviewed and updated October 11, 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 October 11, 2026.
Blair County, Pennsylvania, has about 120,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Blair County is held at the county jail, run by the Blair 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: Blair County public records, Blair County arrest records, Blair County warrants, Blair County criminal records, Blair County court records, Pennsylvania arrest records and Pennsylvania inmate search.
Finding Someone in Custody in Blair County
The county jail, run by the Blair County Sheriff's Office, holds everyone kept in custody after an arrest in Blair County, from every agency.
SearchSystems opened and checked the jail page of the Blair County Sheriff's Office at blaircountypa.gov/departments/sheriff (page title: Blair County | Sheriff), phone 814-693-3100, 423 Allegheny Street Suite 111 Hollidaysburg, PA 16648, which answered when SearchSystems opened it on October 11, 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 814-693-3100.
The Blair County Jail by the Numbers
On an average day in 2023 the jail held about 340 people, up from about 330 in 2019. Its rated capacity in 2023 was 350 beds, and it ran at 96 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Blair County has about 120,000 residents (2024 Census Bureau estimate), so the jail holds about 28 people for every 10,000 residents.
Who Books People Into the Blair County Jail
The Blair County Sheriff's Office and the agencies that report for Altoona, Hollidaysburg, Tyrone, Roaring Spring, Martinsburg, Bellwood and two more cities make the arrests that end in a booking in Blair County.
The FBI's agency list also places one campus police department, three state agencies, one other agency and one state police unit in Blair County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Altoona's 2,265 for 2025, Logan Township's 549 for 2025 and Allegheny Township's 326 for 2025.
Together, the 13 agencies in Blair County with all twelve months of 2025 on file reported 3,934 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 Blair 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 Blair 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 Blair County?
Ask the Blair County Sheriff's Office at 814-693-3100; its jail page SearchSystems verified is at blaircountypa.gov/departments/sheriff.
How many people are in the Blair County jail?
About 340 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 350 beds.
What is the phone number for the Blair County jail?
814-693-3100, the number on the page of the Blair County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Blair County go?
To a facility of the Pennsylvania Department of Corrections; its inmate locator is at inmatelocator.cor.pa.gov.
Is this the official Blair 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.