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 24, 2026 and September 26, 2026.
Newton, Iowa, in Jasper County, has about 16,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Newton is held at the county jail, run by the Jasper 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: Newton public records, Jasper County inmate search, Newton arrest records, Newton warrants, Newton criminal records, Newton court records, Iowa arrest records and Iowa inmate search.
Finding Someone in Custody in Newton
The county jail, run by the Jasper County Sheriff's Office, holds everyone kept in custody after an arrest in Newton, from every agency.
SearchSystems opened and checked the custody page of the Jasper County Sheriff's Office at jasperso.com/inmate-roster (page title: Inmate Roster | Jasper SO), which answered when SearchSystems opened it on September 24, 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 Jasper County Jail by the Numbers
On an average day in 2019 the jail held about 67 people. Its rated capacity in 2019 was 127 beds, and it ran at 53 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Jasper County has about 38,000 residents (2024 Census Bureau estimate), so the jail holds about 18 people for every 10,000 residents.
Who Books People Into the Jasper County Jail
The Jasper County Sheriff's Office and the agency that reports for Newton (filed by the FBI as Newton Police Department) make the arrests that end in a booking in and around Newton.
The Mitchellville Police Department is listed by the FBI across two counties including Jasper County, so its arrests are not broken out for Jasper County here.
The largest arrest counts reported to the FBI were Newton's 579 for 2025, the Jasper County Sheriff's Office's 300 for 2025 and Monroe's 26 for 2025.
Together, the five agencies in Jasper County with all twelve months of 2025 on file reported 928 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 Newton arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Iowa Department of Corrections lists its inmates at doc.iowa.gov/inmate-family-services.
Frequently Asked Questions
How do I find an inmate in Newton?
Look on the custody page of the Jasper County Sheriff's Office at jasperso.com/inmate-roster. It covers people booked into the county jail.
How many people are in the Jasper County jail?
About 67 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 127 beds.
Where do people sentenced to prison in Jasper County go?
To a facility of the Iowa Department of Corrections; its inmate locator is at doc.iowa.gov/inmate-family-services.
Is this the official Newton 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.