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 30, 2026.
Sully County, South Dakota, has about 1,500 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Sully County is held at the county jail, run by the Sully 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: Sully County public records, Sully County arrest records, Sully County warrants, Sully County criminal records, Sully County court records, South Dakota arrest records and South Dakota inmate search.
Finding Someone in Custody in Sully County
A person kept in custody after an arrest in Sully County is held at the county jail, run by the Sully County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Sully County Sheriff's Office at sully.sdcounty.gov/offices/registerofdeeds/sheriff (page title: Sheriff | Sully County SD), phone (605) 258-2244, which answered when SearchSystems opened it on September 30, 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 (605) 258-2244.
The Sully County Jail by the Numbers
On an average day in 2023 the jail held about 10 people, down from about 11 in 2019. Its rated capacity in 2023 was 12 beds, and it ran at 79 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Sully County has about 1,500 residents (2024 Census Bureau estimate), so the jail holds about 65 people for every 10,000 residents.
Who Books People Into the Sully County Jail
The Sully County Sheriff's Office makes the arrests that end in a booking in Sully County.
The Sully County Sheriff's Office reported 8 arrests to the FBI for 2020. 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 Sully 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 Sully County serves the sentence in a facility of the South Dakota Department of Corrections, whose inmate locator is at doc.sd.gov/adult-corrections/offender-locator.
Frequently Asked Questions
How do I find an inmate in Sully County?
Ask the Sully County Sheriff's Office at (605) 258-2244; its jail page SearchSystems verified is at sully.sdcounty.gov.
How many people are in the Sully County jail?
About 10 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 12 beds.
What is the phone number for the Sully County jail?
(605) 258-2244, the number on the page of the Sully County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Sully County go?
To a facility of the South Dakota Department of Corrections; its inmate locator is at doc.sd.gov/adult-corrections/offender-locator.
Is this the official Sully 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.