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 28, 2026.
Dunn County, North Dakota, has about 4,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Dunn County is held at the county jail, run by the Dunn 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: Dunn County public records, Dunn County arrest records, Dunn County warrants, Dunn County police reports, North Dakota arrest records and North Dakota inmate search.
Finding Someone in Custody in Dunn County
The county jail, run by the Dunn County Sheriff's Office, holds everyone kept in custody after an arrest in Dunn County, from every agency.
SearchSystems opened and checked the jail page of the Dunn County Sheriff's Office at dunncountynd.gov/sheriff (page title: Sheriff's Office | Dunn County, ND), phone 800-472-2121, which answered when SearchSystems opened it on September 28, 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 800-472-2121.
The Dunn County Jail by the Numbers
On an average day in 2023 the jail held about 7 people, up from about 5 in 2019. Its rated capacity in 2023 was 10 beds, and it ran at 64 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Dunn County has about 4,000 residents (2024 Census Bureau estimate), so the jail holds about 17 people for every 10,000 residents.
Who Books People Into the Dunn County Jail
The Dunn County Sheriff's Office and the agency that reports for Killdeer make the arrests that end in a booking in Dunn County.
The largest arrest counts reported to the FBI were the Dunn County Sheriff's Office's 143 for 2025 and Killdeer's 21 for 2025.
Together, the two agencies in Dunn County with all twelve months of 2025 on file reported 164 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 Dunn 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 Dunn County serves the sentence in a facility of the North Dakota Department of Corrections and Rehabilitation, whose inmate locator is at docr.nd.gov/resident-lookup.
Frequently Asked Questions
How do I find an inmate in Dunn County?
Ask the Dunn County Sheriff's Office at 800-472-2121; its jail page SearchSystems verified is at dunncountynd.gov/sheriff.
How many people are in the Dunn County jail?
About 7 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 10 beds.
What is the phone number for the Dunn County jail?
800-472-2121, the number on the page of the Dunn County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Dunn County go?
To a facility of the North Dakota Department of Corrections and Rehabilitation; its inmate locator is at docr.nd.gov/resident-lookup.
Is this the official Dunn 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.