Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest and crime 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 23, 2026 and September 30, 2026.
Fond du Lac County, Wisconsin, has about 104,000 residents (2024 Census Bureau estimate). In Wisconsin the public criminal record is the court file, kept by the Clerk of Circuit Court; the statewide criminal history kept by the Wisconsin Department of Justice is open to anyone who asks. This guide says where each record of a criminal case from Fond du Lac County is kept and how it is seen.
This guide covers the court file, the statewide record, local arrest records, the crimes behind the records, the prosecutor, sex offender registry, records requests and common questions.
Related guides: Fond du Lac County public records, Fond du Lac County arrest records, Fond du Lac County warrants, Fond du Lac County inmate search, Fond du Lac County court records, Wisconsin arrest records and Wisconsin inmate search.
Criminal Cases in the Fond du Lac County Circuit Court
In Wisconsin the public criminal record is the court file. Criminal cases from Fond du Lac County are heard by the Fond du Lac County Circuit Court, which hears every civil, criminal, family, probate and juvenile case, and the file of each case is kept by the Clerk of Circuit Court.
For Fond du Lac County, SearchSystems opened and checked the court records page for the county at fdlco.wi.gov/departments/departments-a-e/clerk-of-courts/courts-dep... (page title: Courts Departments | Fond du Lac County), phone (888) 604-7888, which answered when SearchSystems opened it on September 23, 2026.
Statewide, Wisconsin Circuit Court Access is the free statewide case search of every circuit court.
The Wisconsin Criminal History and Your Own Copy
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. The result is the repository record, what agencies reported to the state, which is wider than one county's court index but can lag it.
Arrest Records Kept Locally in Fond du Lac County
The Fond du Lac County Sheriff's Office and the agencies that report for Fond du Lac, Ripon, North Fond du Lac, Campbellsport, Oakfield, Rosendale and one more cities keep the arrest records in Fond du Lac County: the report and the booking record of each arrest stay with the agency that made it, separate from the court file and from the state repository.
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.
Together, the four agencies in Fond du Lac County with all twelve months of 2025 on file reported 5,906 arrests to the FBI that year; how each case ended is in the court file, not in the arresting agency's.
The agencies and their counts, year by year, are in Fond du Lac County arrest records.
The Crimes Behind the Records: Fond du Lac County in 2025
The four agencies in Fond du Lac County with all twelve months of 2025 on file reported 224 violent and 916 property crimes to the FBI that year; the same agencies with both 2025 and 2024 complete reported 1,140 crimes in 2025 against 1,311 in 2024. Each reported crime is a report on file with the agency that took it, and each arrest that follows is the start of a criminal record.
The full crime section, agency by agency, is on the Fond du Lac County public records guide.
The District Attorney for Fond du Lac County
The District Attorney decides which arrests in Fond du Lac County become charges and files them in the Fond du Lac County Circuit Court; the office answers questions about pending prosecutions, and the case files themselves are court records.
The office's page SearchSystems verified is at fdlco.wi.gov/departments/departments-a-e/district-attorney (page title: Fond du Lac County | Fond du Lac County), phone (920) 929-3048, 160 South Macy Street Fond du Lac, WI 54935, Monday through Friday 8:00 a.m. - 4:30 p.m., which answered when SearchSystems opened it on September 30, 2026.
The Sex Offender Registry for Fond du Lac County
Registered sex offenders living in Fond du Lac County are listed on the Wisconsin Sex Offender Registry, run by the Wisconsin Department of Corrections at wistaysafe.gov. The registry is public and can be searched online.
Registration itself is done in person with the local agency where the registrant lives: the sheriff's office, or the city police in a city with its own department.
Asking an Agency in Fond du Lac County for a Record
An arrest report, a booking record or a local criminal history letter comes from the agency that holds it, not from the court.
Under the Wisconsin Public Records Law a county office must answer a request 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. The county records request page SearchSystems verified is at fdlco.wi.gov/departments/departments-n-z/treasurer/obtaining-copies... (page title: Open Records Requests | Fond du Lac County).
Frequently Asked Questions
Are criminal 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.
Can I search Fond du Lac County criminal cases online?
The court records page SearchSystems verified for the county is at fdlco.wi.gov (page title: Courts Departments | Fond du Lac County). Statewide, Wisconsin Circuit Court Access is the free statewide case search of every circuit court.
How do I get my own Wisconsin criminal history?
Through the same record check, run on yourself.
Who prosecutes crimes in Fond du Lac County?
The District Attorney, reached at (920) 929-3048, which files its cases in the Fond du Lac County Circuit Court.
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.