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.
Dauphin County, Pennsylvania, has about 293,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Dauphin 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: Dauphin County public records, Dauphin County arrest records, Dauphin County warrants, Dauphin County criminal records, Dauphin County court records, Pennsylvania arrest records and Pennsylvania inmate search.
Finding Someone in Custody in Dauphin County
A person kept in custody after an arrest in Dauphin 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 dauphincounty.gov/government/support-services/prison/inmate-lookup (page title: Proceed with caution!), 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 Dauphin County Jail by the Numbers
On an average day in 2024 the jail held about 1,010 people, up from about 1,000 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,329 beds, and it ran at 78 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Dauphin County has about 293,000 residents (2024 Census Bureau estimate), so the jail holds about 35 people for every 10,000 residents.
Who Books People Into the Dauphin County Jail
The agencies that report for Harrisburg, Middletown, Steelton, Hummelstown, Penbrook, Highspire and three more cities make the arrests that end in a booking in Dauphin County.
The FBI's agency list also places five state agencies, three other agencies, one campus police department and one state police unit in Dauphin County (the arrest records guide names each one).
The largest arrest counts reported to the FBI were Harrisburg's 1,948 for 2025, Susquehanna Township's 1,268 for 2025 and Lower Paxton Township's 1,125 for 2025.
Together, the 15 agencies in Dauphin County with all twelve months of 2025 on file reported 6,965 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 Dauphin 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 Dauphin County?
Look on the custody page of the sheriff's office at dauphincounty.gov. It covers people booked into the county jail.
How many people are in the Dauphin County jail?
About 1,010 on an average day in 2024, the latest year in the Vera Institute's jail data, against a rated capacity of 1,329 beds.
Where do people sentenced to prison in Dauphin County go?
To a facility of the Pennsylvania Department of Corrections; its inmate locator is at inmatelocator.cor.pa.gov.
Is this the official Dauphin 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.