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. Every office link was opened and checked against the office's own site between September 24, 2026 and October 9, 2026.
Foster County, North Dakota, has about 3,300 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Foster County is held at the county jail, run by the Foster 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, who books people, state prison and common questions.
Related guides: Foster County public records, Foster County arrest records, Foster County warrants, Foster County police reports, Foster County property records, North Dakota arrest records and North Dakota inmate search.
Finding Someone in Custody in Foster County
The county jail, run by the Foster County Sheriff's Office, holds everyone kept in custody after an arrest in Foster County, from every agency.
SearchSystems opened and checked the jail page of the Foster County Sheriff's Office at fostercounty.com/sheriffs-office (page title: Sheriff's Office), phone (701) 652-2251, 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) 652-2251.
Who Books People Into the Foster County Jail
The Foster County Sheriff's Office and the agency that reports for Carrington make the arrests that end in a booking in Foster County.
The largest arrest counts reported to the FBI were Carrington's 12 for 2025 and the Foster County Sheriff's Office's 8 for 2025.
Together, the two agencies in Foster County with all twelve months of 2025 on file reported 20 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 Foster 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 North Dakota Department of Corrections and Rehabilitation lists its inmates at docr.nd.gov/resident-lookup.
Frequently Asked Questions
How do I find an inmate in Foster County?
Ask the Foster County Sheriff's Office at (701) 652-2251; its jail page SearchSystems verified is at fostercounty.com/sheriffs-office.
What is the phone number for the Foster County jail?
(701) 652-2251, the number on the page of the Foster County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Foster 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 Foster 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.