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 October 4, 2026.
Williamson County, Illinois, has about 67,000 residents (2024 Census Bureau estimate). A police report belongs to the agency whose officer wrote it, so which office holds a report from Williamson County depends on where the incident happened: the Williamson County Sheriff's Office for the unincorporated county, the agency that reports for the city inside a city. This guide names each agency, where its records page is and what the Illinois Freedom of Information Act requires of it.
This guide covers which agency, the sheriff's reports, the cities' reports, how many reports, what the law requires and common questions.
Related guides: Williamson County public records, Williamson County arrest records, Williamson County warrants, Williamson County inmate search, Williamson County criminal records, Illinois arrest records and Illinois inmate search.
Which Agency Holds a Report from Williamson County
A crime, incident or collision report belongs to the agency whose officer wrote it, and that agency releases it, not the court, the jail or the prosecutor.
In Williamson County that is the Williamson County Sheriff's Office for the unincorporated county and for any city that contracts with it for police service, and the agency that reports for a city where the city has one of its own.
The FBI's list also carries John A. Logan College (campus police), with a records office of its own.
Reports from the Williamson County Sheriff's Office
The Williamson County Sheriff's Office is the county agency; it reported 0 arrests for 2019.
Its reports come from its records unit, reached through the office at 618-997-6541. The office's page SearchSystems verified is its jail page, at wcsheriff.com/corrections2.html, phone 618-997-6541, which answered when SearchSystems opened it on October 4, 2026.
Reports from the City Agencies in Williamson County
The seven cities the FBI lists in Williamson County with a reporting agency of their own, with the police records page SearchSystems verified where the city has a guide:
- Marion: 72 violent and 441 property crimes reported for 2025; 1,076 arrests reported for 2025.
- Herrin: 47 violent and 270 property crimes reported for 2025; 487 arrests reported for 2025. The Herrin police department's page is at cityofherrin.com/policedepartment, phone (618)942-4132 (verified September 25, 2026).
- Carterville: 4 violent and 5 property crimes reported for 2025; 55 arrests reported for 2025.
- Johnston City: 1,152 arrests reported for 2025.
- Cambria: 0 arrests reported for 2020.
- Energy: 1 violent and 1 property crimes reported for 2025; 23 arrests reported for 2025.
- Hurst: 0 arrests reported for 2019.
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.
How Many Reports: Williamson County in 2025
The four agencies in Williamson County with all twelve months of 2025 on file reported 124 violent and 717 property crimes to the FBI that year, each one a report taken by the agency that holds it.
Together, the five agencies in Williamson County with all twelve months of 2025 on file reported 2,793 arrests to the FBI that year, and each arrest is a report of its own.
What the Illinois Freedom of Information Act Requires
The Illinois Freedom of Information Act sets the rules: an answer within 5 business days, with one 5-day extension, at a charge of copying only after the first 50 pages, from the agency that holds the report.
A defendant who has been charged gets the report through the case: the State's Attorney, (618) 998-2229, handles discovery for pending cases.
Frequently Asked Questions
How do I get a police report in Williamson County?
From the agency whose officer took it: the Williamson County Sheriff's Office for its own arrests, or the agency that reports for the city where it happened. Under the Illinois Freedom of Information Act the answer is due within 5 business days, with one 5-day extension.
How long does an agency in Williamson County have to answer?
Under the Illinois Freedom of Information Act, within 5 business days, with one 5-day extension. It may charge copying only after the first 50 pages.
How do I get a report from the Williamson County Sheriff's Office?
From its records unit, reached through the office at 618-997-6541. Under the Illinois Freedom of Information Act the answer is due within 5 business days, with one 5-day extension.
Is this the official Williamson 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.