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 2, 2026.
Grayslake, Illinois, in Lake County, has about 21,000 residents (2024 Census Bureau estimate). A police report belongs to the agency whose officer wrote it, so which office holds a report from Grayslake depends on where the incident happened. 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 city's records page, the sheriff's reports, what the law requires and common questions.
Related guides: Grayslake public records, Lake County police reports, Grayslake arrest records, Grayslake warrants, Grayslake inmate search, Grayslake criminal records, Illinois arrest records and Illinois inmate search.
Which Agency Holds a Report from Grayslake
The report of an incident is released by the agency that took it; the court and the jail hold their own records of the same event, but not the report.
Inside Grayslake that is the agency that reports to the FBI for the city (filed by the FBI as Grayslake Police Department); outside it, the Lake County Sheriff's Office.
The FBI's agency list also places one campus police department and three other agencies in Lake County, each with a records office of its own.
The Barrington Police Department, the Island Lake Police Department, the Fox River Grove Police Department and one more are each listed by the FBI across several counties including Lake County, so their arrests are not broken out for Lake County here.
Reports from the Grayslake Police
For Grayslake, SearchSystems opened and checked the Grayslake police records page at villageofgrayslake.com/366/Requesting-Police-Reports (page title: Requesting Police Reports | Grayslake, IL), phone 847-223-2341, which answered when SearchSystems opened it on September 27, 2026.
The agency that reports for Grayslake had 6 violent and 110 property crimes reported for 2025 and reported 126 arrests for 2025.
Reports from the Lake County Sheriff's Office
The Lake County Sheriff's Office is the county agency; it had 99 violent and 522 property crimes reported for 2025 and reported 656 arrests for 2025.
Its reports come from its records unit. The office's page SearchSystems verified is its custody page, at lakecountyil.gov/2031/Inmate-Information (page title: Inmate Information | Lake County, IL), 29 S Martin Luther King Jr Avenue, Waukegan, IL 60085, a site that blocks automated checks (HTTP 429), so open it in a browser.
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.
Frequently Asked Questions
How do I get a police report in Grayslake?
From the agency that took it. The Grayslake police records page is at villageofgrayslake.com, phone 847-223-2341; the sheriff's reports come from the Lake County Sheriff's Office.
How long does an agency in Grayslake 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 Lake County Sheriff's Office?
From its records unit. Under the Illinois Freedom of Information Act the answer is due within 5 business days, with one 5-day extension.
Is this the official Grayslake 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.