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 September 30, 2026.
Fond du Lac County, Wisconsin, has about 104,000 residents (2024 Census Bureau estimate), and arrests there are reported to the FBI by the Fond du Lac County Sheriff's Office and eight city agencies. An arrest leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the District Attorney files charges, a case in the Fond du Lac County Circuit Court. This guide says who keeps each one, what it costs and who may see it, with the arrest counts each agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies, cities and common questions.
Related guides: Fond du Lac County public records, Wisconsin arrest records, Wisconsin inmate search and Wisconsin criminal records.
Who Makes Arrests in Fond du Lac County
The Fond du Lac County Sheriff's Office is the county agency that reports arrests to the FBI for Fond du Lac County. It reported 1,471 arrests for 2025.
Arrests inside seven of the county's cities are reported to the FBI by an agency of the city's own, listed here with the Census population and what each reported:
- Fond du Lac, 44,469 residents: 3,718 arrests reported for 2025.
- Ripon, 7,716 residents: 342 arrests reported for 2025.
- North Fond du Lac, 5,419 residents: 375 arrests reported for 2025.
- Campbellsport, 1,997 residents: 9 arrests reported for 2020.
- Oakfield, 1,064 residents.
- Rosendale, 1,037 residents: 0 arrests reported for 2022.
- Brandon, 877 residents: 10 arrests reported for 2020.
A city on that list is reported separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
The Waupun Police Department is listed by the FBI across two counties including Fond du Lac County, so its arrests are not broken out for Fond du Lac County here.
How Many Arrests Each Agency Reports in Fond du Lac County
The FBI publishes every agency's monthly arrest counts on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Fond du Lac: 3,718 for 2025, 3,296 for 2024, 1,991 for 2022, 2,189 for 2021, 2,168 for 2020 and 2,544 for 2019; 2023 is missing months.
- Fond du Lac County Sheriff's Office: 1,471 for 2025, 1,556 for 2024, 1,593 for 2023, 1,271 for 2022, 1,500 for 2021 and 1,412 for 2020.
- North Fond du Lac: 375 for 2025, 306 for 2024, 310 for 2023, 270 for 2022, 194 for 2021 and 184 for 2020.
- Ripon: 342 for 2025, 366 for 2024, 279 for 2023, 319 for 2022, 323 for 2021 and 286 for 2020.
- Brandon: 10 for 2020 and 0 for 2019.
- Campbellsport: 9 for 2020 and 11 for 2019.
- Ripon Town: 0 for 2023, 0 for 2020 and 0 for 2019; 2021 and 2022 are missing months.
- Rosendale: 0 for 2022, 0 for 2020 and 0 for 2019; 2021 is missing months.
Together, the four agencies with all twelve months of 2025 on file reported 5,906 arrests that year. The same agencies with both 2025 and 2024 complete reported 5,906 in 2025 against 5,524 in 2024, up 6.9 percent.
Through March 2026, the four agencies with every month so far on file reported 1,236 arrests, against 1,436 in the same months of 2025.
Campbellsport and Rosendale reported only part of 2025 (7 months and 7 months) and are left out of the totals.
Booking: Where People Arrested in Fond du Lac County Are Held
A person kept in custody after an arrest in Fond du Lac County is held at the county jail, whichever agency made the arrest, apart from the short stay some city departments' own holding cells allow; a person cited and released at the scene is not booked at all. The jail's record of each person held, with the charges, is a public record of the arrest, and the court file takes over from there.
On an average day in 2025 the jail held about 270 people, down from about 270 in 2019. Its rated capacity in 2025 was 335 beds, and it ran at 81 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the jail page of the Fond du Lac County Sheriff's Office at fdlsheriff.com/jail/jail-information (page title: Jail Information | Fond du Lac County), phone (920) 929-3394, 63 Western Avenue Fond du Lac, WI 54935, Monday through Friday 8:00 a.m. - 4:30 p.m., which answered when SearchSystems opened it on September 28, 2026.
A sentence of more than a year is served in state prison; the Wisconsin Department of Corrections lists its inmates at appsdoc.wi.gov/lop/welcome.
How to Find Out About an Arrest in Fond du Lac County
An arrest in Fond du Lac County can be traced in two places, depending on where the case stands: the case index of the Fond du Lac County Circuit Court, which shows whether charges were filed and the next court date (the court records page SearchSystems verified is at fdlco.wi.gov/departments/departments-a-e/clerk-of-courts/courts-dep..., phone (888) 604-7888); the District Attorney, which decides whether an arrest becomes a charge (its page is at fdlco.wi.gov/departments/departments-a-e/district-attorney, phone (920) 929-3048).
Statewide, Wisconsin Circuit Court Access is the free statewide case search of every circuit court.
Wisconsin is one of the states that lets anyone look up another person's statewide criminal history: the Wisconsin Online Record Check System lets anyone run a name-based check, through the Wisconsin Department of Justice. That record shows what agencies reported to the state, which is wider than one county's court index but can lag it.
Getting a Copy of an Arrest Record in Fond du Lac County
An arrest report belongs to the agency whose officer wrote it, and that agency releases it, not the court or the jail. Under the Wisconsin Public Records Law the agency must answer as soon as practicable and without delay; the law sets no number of days, and it may charge the actual cost of copying and locating, with no charge for the first $50 of locating.
- An arrest by the Fond du Lac County Sheriff's Office: ask its records unit, reached through the office at (920) 929-3394.
- An arrest in Fond du Lac, Ripon, North Fond du Lac, Campbellsport, Oakfield, Rosendale or another of the cities listed above: the records unit of the agency that reports for that city; the city guides linked above name each city's records office.
- A defendant who has been charged gets the report through the case: the District Attorney, (920) 929-3048, handles discovery for pending cases.
- The court file of a case that was filed: the Fond du Lac County Circuit Court, through the court records page at fdlco.wi.gov, phone (888) 604-7888.
- Any county record that is not posted: the county records request page SearchSystems verified is at fdlco.wi.gov (page title: Open Records Requests | Fond du Lac County).
- Your own statewide record: the same request described above, for your own name.
Cities in Fond du Lac County: Who Reports the Arrests
The FBI lists a separate arrest reporting agency for seven of the 11 cities in Fond du Lac County: Fond du Lac, Ripon, North Fond du Lac, Campbellsport, Oakfield, Rosendale and Brandon. Eden, St. Cloud, Mount Calvary and Fairwater have no separate reporting agency in the FBI's list. The FBI's list also carries the Ripon Town Police Department as a city agency in Fond du Lac County; Ripon Town is not among the cities above.
Wherever in the county the arrest happens, a person kept in custody goes to the county jail and the case goes to the Fond du Lac County Circuit Court.
SearchSystems has a guide to the offices of these cities in Fond du Lac County, with the 2024 Census Bureau population; a city with its own arrest records guide opens there:
- Ripon (7,716)
Frequently Asked Questions
How many arrests are made in Fond du Lac County each year?
Fond du Lac reported 3,718 arrests to the FBI for 2025, and the four agencies with every month of 2025 on file reported 5,906 between them.
How do I find out if someone is in jail in Fond du Lac County?
Ask the Fond du Lac County Sheriff's Office at (920) 929-3394; its jail page SearchSystems verified is at fdlsheriff.com/jail/jail-information.
Where are people arrested in Fond du Lac County booked?
Those kept in custody go to the county jail, run by the Fond du Lac County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in Fond du Lac County?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Wisconsin Department of Justice: the Wisconsin Online Record Check System lets anyone run a name-based check. The arrest report itself is released by the agency that made the arrest, under the Wisconsin Public Records Law.
How do I get a copy of an arrest report in Fond du Lac County?
From the agency that made the arrest: the Fond du Lac County Sheriff's Office for its own arrests, or the agency that reports for the city where it happened. Under the Wisconsin Public Records Law the answer is due as soon as practicable and without delay; the law sets no number of days; the county records request page SearchSystems verified is at fdlco.wi.gov.
Is this the official Fond du Lac 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.