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.
Fargo, North Dakota, in Cass County, has about 136,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Fargo is held at the county jail, run by the Cass 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: Fargo public records, Cass County inmate search, Fargo arrest records, Fargo warrants, Fargo criminal records, Fargo court records, North Dakota arrest records and North Dakota inmate search.
Finding Someone in Custody in Fargo
A person kept in custody after an arrest in Fargo is held at the county jail, run by the Cass County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Cass County Sheriff's Office at casscountynd.gov/our-county/sheriff (page title: Sheriff's Office | Cass County, ND), phone (701) 241-5800, Monday-Friday, 8 am-5 pm, 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 (701) 241-5800.
The Cass County Jail by the Numbers
On an average day in 2023 the jail held about 330 people, up from about 260 in 2019. Its rated capacity in 2023 was 348 beds, and it ran at 94 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Cass County has about 201,000 residents (2024 Census Bureau estimate), so the jail holds about 16 people for every 10,000 residents.
Who Books People Into the Cass County Jail
The Cass County Sheriff's Office and the agency that reports for Fargo (filed by the FBI as Fargo Police Department) make the arrests that end in a booking in and around Fargo.
The FBI's agency list also places one more agency in Cass County: North Dakota State University (campus police).
The largest arrest counts reported to the FBI were Fargo's 3,563 for 2025, West Fargo's 1,056 for 2025 and the Cass County Sheriff's Office's 402 for 2025.
Together, the three agencies in Cass County with all twelve months of 2025 on file reported 5,021 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 Fargo 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 Cass 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 Fargo?
Ask the Cass County Sheriff's Office at (701) 241-5800; its jail page SearchSystems verified is at casscountynd.gov/our-county/sheriff.
How many people are in the Cass County jail?
About 330 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 348 beds.
What is the phone number for the Cass County jail?
(701) 241-5800, the number on the page of the Cass County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Cass 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 Fargo 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.