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 30, 2026 and October 1, 2026.
O'Brien County, Iowa, has about 14,000 residents (2024 Census Bureau estimate), and arrests there are reported to the FBI by the O'Brien County Sheriff's Office and one city agency. An arrest leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the County Attorney files charges, a case in the Iowa District Court for O'Brien County. This guide says who keeps each one, what it costs and who may see it, with the arrest counts each agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies, cities and common questions.
Related guides: O'Brien County public records, Iowa arrest records, Iowa inmate search and Iowa criminal records.
Who Makes Arrests in O'Brien County
The O'Brien County Sheriff's Office is the county agency that reports arrests to the FBI for O'Brien County. It reported 151 arrests for 2025.
The FBI lists one city in O'Brien County with a reporting agency of its own:
- Sheldon, 5,584 residents: 177 arrests reported for 2025.
A city on that list is reported separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
How Many Arrests Each Agency Reports in O'Brien County
The FBI publishes every agency's monthly arrest counts on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Sheldon: 177 for 2025, 216 for 2024, 242 for 2023, 146 for 2022, 123 for 2021 and 167 for 2020.
- O'Brien County Sheriff's Office: 151 for 2025, 154 for 2024, 233 for 2023, 221 for 2022, 199 for 2021 and 248 for 2020.
Together, the two agencies with all twelve months of 2025 on file reported 328 arrests that year. The same agencies with both 2025 and 2024 complete reported 328 in 2025 against 370 in 2024, down 11 percent.
Through August 2026, the two agencies with every month so far on file reported 184 arrests, against 225 in the same months of 2025.
Booking: Where People Arrested in O'Brien County Are Held
The county jail is where a person arrested in O'Brien County and kept in custody ends up, whichever agency made the arrest, though a city department may hold someone in its own cells first and a person cited and released at the scene is never booked. The jail's record of each person held, with the charges, is a public record of the arrest, and once the person is released or sentenced the record continues in the court file.
On an average day in 2020 the jail held about 34 people, up from about 34 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 34 beds, and it ran at 100 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the jail page of the O'Brien County Sheriff's Office at obriencountysheriff.com (page title: O'Brien County Sheriff), phone (712) 757-3415, which answered when SearchSystems opened it on September 30, 2026.
A person sentenced to prison serves the sentence in a facility of the Iowa Department of Corrections, whose inmate locator is at doc.iowa.gov/inmate-family-services.
How to Find Out About an Arrest in O'Brien County
Whether someone was arrested in O'Brien County, and what came of it, shows up in two places: the case index of the Iowa District Court for O'Brien County, kept by the Clerk of the District Court, which shows whether charges were filed and the next court date; the County Attorney, which decides whether an arrest becomes a charge (its page is at obriencounty.iowa.gov/departments/attorney, phone 712-957-3375).
The court records page SearchSystems verified for the county, at courtrecord.net/obrien-county-ia-courts (page title: O'Brien County Court Records for Free (O'Brien County, IA)), phone 712-957-3255, belongs to a lower court, not to the Iowa District Court for O'Brien County.
Statewide, Iowa Courts Online is the Iowa Judicial Branch's free statewide case search.
Iowa is one of the states that lets anyone look up another person's statewide criminal history: anyone can request a name-based criminal history check online, through the Iowa Division of Criminal Investigation. That record shows what agencies reported to the state, which is wider than one county's court index but can lag it.
Getting a Copy of an Arrest Record in O'Brien County
The report of an arrest is released by the agency that made it; the jail and the court hold their own records of the same event, but not the report. Under the Iowa Open Records Law (Chapter 22) the agency must answer without delay; the law sets no fixed number of days, and a delay past 20 days must be justified, and it may charge the actual cost of copying and retrieval.
- An arrest by the O'Brien County Sheriff's Office: ask its records unit, reached through the office at (712) 757-3415.
- An arrest in Sheldon: the records unit of the agency that reports for that city.
- A defendant who has been charged gets the report through the case: the County Attorney, 712-957-3375, handles discovery for pending cases.
- The court file of a case that was filed: in the Iowa District Court for O'Brien County it is kept by the Clerk of the District Court. The court records page SearchSystems verified for the county, at courtrecord.net/obrien-county-ia-courts, phone 712-957-3255, is a lower court's.
- Any county record that is not posted: the county records request page SearchSystems verified is at ia.iowadot.gov/openrecords (page title: Open Records Request | FOIA).
- Your own statewide record: the same request described above, for your own name.
Cities in O'Brien County: Who Reports the Arrests
The FBI lists a separate arrest reporting agency for one of the eight cities in O'Brien County: Sheldon. Hartley, Sanborn, Paullina, Primghar, Sutherland, Calumet and Archer have no separate reporting agency in the FBI's list.
Wherever in the county the arrest happens, a person kept in custody goes to the county jail and the case goes to the Iowa District Court for O'Brien County.
Frequently Asked Questions
How many arrests are made in O'Brien County each year?
Sheldon reported 177 arrests to the FBI for 2025, and the two agencies with every month of 2025 on file reported 328 between them.
How do I find out if someone is in jail in O'Brien County?
Ask the O'Brien County Sheriff's Office at (712) 757-3415; its jail page SearchSystems verified is at obriencountysheriff.com.
Where are people arrested in O'Brien County booked?
Those kept in custody go to the county jail, run by the O'Brien County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in O'Brien County?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Iowa Division of Criminal Investigation: anyone can request a name-based criminal history check online. The arrest report itself is released by the agency that made the arrest, under the Iowa Open Records Law (Chapter 22).
How do I get a copy of an arrest report in O'Brien County?
From the agency that made the arrest: the O'Brien County Sheriff's Office for its own arrests, or the agency that reports for the city where it happened. Under the Iowa Open Records Law (Chapter 22) the answer is due without delay; the law sets no fixed number of days, and a delay past 20 days must be justified; the county records request page SearchSystems verified is at ia.iowadot.gov/openrecords.
Is this the official O'Brien 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.