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 23, 2026 and October 2, 2026.
St. Peter, Minnesota, in Nicollet County, has about 12,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in St. Peter is held at the county jail, run by the Nicollet 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 and common questions.
Related guides: St. Peter public records, Nicollet County inmate search, St. Peter arrest records, St. Peter warrants, St. Peter criminal records, St. Peter court records, Minnesota arrest records and Minnesota inmate search.
Finding Someone in Custody in St. Peter
The county jail, run by the Nicollet County Sheriff's Office, holds everyone kept in custody after an arrest in St. Peter, from every agency.
SearchSystems opened and checked the jail page of the Nicollet County Sheriff's Office at nicolletcountymn.gov/240/Sheriffs-Office (page title: Sheriff's Office | Nicollet County, MN), phone 507-934-7100, 501 S. Minnesota Avenue P.O. Box 117 St. Peter, MN 56082, Monday - Friday 8 a.m. - 5 p.m., which answered when SearchSystems opened it on September 23, 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 507-934-7100.
The Nicollet County Jail by the Numbers
On an average day in 2021 the jail held about 16 people, down from about 17 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 34 beds, and it ran at 50 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Nicollet County has about 34,000 residents (2024 Census Bureau estimate), so the jail holds about 5 people for every 10,000 residents.
Who Books People Into the Nicollet County Jail
The Nicollet County Sheriff's Office and the agency that reports for St. Peter (filed by the FBI as St. Peter Police Department) make the arrests that end in a booking in and around St. Peter.
The Mankato Police Department is listed by the FBI across two counties including Nicollet County, so its arrests are not broken out for Nicollet County here.
The largest arrest counts reported to the FBI were North Mankato's 197 for 2025, St. Peter's 189 for 2025 and the Nicollet County Sheriff's Office's 35 for 2025.
Together, the three agencies in Nicollet County with all twelve months of 2025 on file reported 421 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 St. Peter arrest records.
Frequently Asked Questions
How do I find an inmate in St. Peter?
Ask the Nicollet County Sheriff's Office at 507-934-7100; its jail page SearchSystems verified is at nicolletcountymn.gov/240/Sheriffs-Office.
How many people are in the Nicollet County jail?
About 16 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 34 beds.
What is the phone number for the Nicollet County jail?
507-934-7100, the number on the page of the Nicollet County Sheriff's Office SearchSystems verified.
Is this the official St. Peter 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.