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.
Armstrong County, Pennsylvania, has about 64,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Armstrong 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: Armstrong County public records, Armstrong County arrest records, Armstrong County warrants, Armstrong County criminal records, Armstrong County court records, Pennsylvania arrest records and Pennsylvania inmate search.
Finding Someone in Custody in Armstrong County
A person kept in custody after an arrest in Armstrong 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 inmatelookup.co.armstrong.pa.us/Details.aspx (page title: Inmate Information), which answered when SearchSystems opened it on September 23, 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 Armstrong County Jail by the Numbers
On an average day in 2023 the jail held about 140 people, down from about 160 in 2019. Its rated capacity in 2023 was 158 beds, and it ran at 91 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Armstrong County has about 64,000 residents (2024 Census Bureau estimate), so the jail holds about 22 people for every 10,000 residents.
Who Books People Into the Armstrong County Jail
The agencies that report for Kittanning, Leechburg, Apollo, West Kittanning, Rural Valley, Parker and one more cities make the arrests that end in a booking in Armstrong County.
The FBI's agency list also places these agencies in Armstrong County: the Bureau of Forestry in Armstrong County and the Office of Attorney General Region 3 in Armstrong County (state agency); the Armstrong County State Police (state police).
The largest arrest counts reported to the FBI were Kittanning's 162 for 2024, Southern Armstrong Regional's 116 for 2025 and Kiskiminetas Township's 94 for 2025.
Together, the 12 agencies in Armstrong County with all twelve months of 2024 on file reported 639 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 Armstrong County arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Pennsylvania Department of Corrections lists its inmates at inmatelocator.cor.pa.gov.
Frequently Asked Questions
How do I find an inmate in Armstrong County?
Look on the custody page of the sheriff's office at inmatelookup.co.armstrong.pa.us/Details.aspx. It covers people booked into the county jail.
How many people are in the Armstrong County jail?
About 140 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 158 beds.
Where do people sentenced to prison in Armstrong County go?
To a facility of the Pennsylvania Department of Corrections; its inmate locator is at inmatelocator.cor.pa.gov.
Is this the official Armstrong 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.