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.
Crystal Lake, Illinois, in McHenry County, has about 42,000 residents (2024 Census Bureau estimate). A police report belongs to the agency whose officer wrote it, so which office holds a report from Crystal Lake 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: Crystal Lake public records, McHenry County police reports, Crystal Lake arrest records, Crystal Lake warrants, Crystal Lake inmate search, Crystal Lake criminal records, Illinois arrest records and Illinois inmate search.
Which Agency Holds a Report from Crystal Lake
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.
Inside Crystal Lake that is the agency that reports to the FBI for the city (filed by the FBI as Crystal Lake Police Department); outside it, the McHenry County Sheriff's Office.
The FBI's list also carries McHenry County College (campus police) and the McHenry County Conservation District and the Crystal Lake Park District (other agency), each with a records office of its own.
The Lakemoor Police Department, the Fox Lake Police Department and the Barrington Hills Police Department are each listed by the FBI across several counties including McHenry County, so their arrests are not broken out for McHenry County here.
Reports from the Crystal Lake Police
For Crystal Lake, SearchSystems opened and checked the Crystal Lake police records page at crystallake.org/your-government/departments/police/administrative-d... (page title: Records Unit | Crystal Lake, IL), phone (815) 356-3774, which answered when SearchSystems opened it on September 25, 2026.
The agency that reports for Crystal Lake had 48 violent and 461 property crimes reported for 2025 and reported 818 arrests for 2025.
Reports from the McHenry County Sheriff's Office
The McHenry County Sheriff's Office is the county agency; it had 31 violent and 140 property crimes reported for 2025 and reported 820 arrests for 2025.
Its reports come from its records unit. The office's page SearchSystems verified is its jail page, at mchenrysheriff.org (page title: McHenry County IL Sheriff's Office), which answered when SearchSystems opened it on September 23, 2026.
What the Illinois Freedom of Information Act Requires
Under the Illinois Freedom of Information Act the agency must answer a request within 5 business days, with one 5-day extension, and it may charge copying only after the first 50 pages. The request goes to the agency that holds the report, in writing, and does not have to say why the report is wanted.
A defendant who has been charged gets the report through the case: the State's Attorney, (815) 334-4159, handles discovery for pending cases.
Frequently Asked Questions
How do I get a police report in Crystal Lake?
From the agency that took it. The Crystal Lake police records page is at crystallake.org, phone (815) 356-3774; the sheriff's reports come from the McHenry County Sheriff's Office.
How long does an agency in Crystal Lake 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 McHenry 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 Crystal Lake 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.