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 28, 2026.
Darien, Illinois, in DuPage County, has about 22,000 residents (2024 Census Bureau estimate). A police report belongs to the agency whose officer wrote it, so which office holds a report from Darien 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: Darien public records, DuPage County police reports, Darien arrest records, Darien warrants, Darien inmate search, Darien criminal records, Illinois arrest records and Illinois inmate search.
Which Agency Holds a Report from Darien
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 Darien that is the agency that reports to the FBI for the city (filed by the FBI as Darien Police Department); outside it, the DuPage County Sheriff's Office.
The FBI's agency list also places two other agencies and two campus police departments in DuPage County, each with a records office of its own.
The Hanover Park Police Department, the St. Charles Police Department, the Bolingbrook Police Department and two more are each listed by the FBI across several counties including DuPage County, so their arrests are not broken out for DuPage County here.
Reports from the Darien Police
For Darien, SearchSystems opened and checked the Darien police records page at darien.il.us/media/m5uhzsp5/police-department-foia.pdf (page title: REQUEST FOR PUBLIC RECORDS Mail or Fax to: Darien Police Department), phone 217-558-0486, Mon - Fri 7am - 3pm, which answered when SearchSystems opened it on September 25, 2026.
The agency that reports for Darien had 3 violent and 160 property crimes reported for 2025 and reported 133 arrests for 2025.
Reports from the DuPage County Sheriff's Office
The DuPage County Sheriff's Office is the county agency; it had 37 violent and 277 property crimes reported for 2025 and reported 279 arrests for 2025.
Its reports come from its records unit. The office's page SearchSystems verified is its jail page, at dupagesheriff.org (page title: DuPage County Sheriff’s Office), which answered when SearchSystems opened it on September 28, 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, 630-407-8000, handles discovery for pending cases.
Frequently Asked Questions
How do I get a police report in Darien?
From the agency that took it. The Darien police records page is at darien.il.us, phone 217-558-0486; the sheriff's reports come from the DuPage County Sheriff's Office.
How long does an agency in Darien 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 DuPage 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 Darien 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.