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 25, 2026.
Tinley Park, Illinois, in Cook County, has about 55,000 residents (2024 Census Bureau estimate). A police report belongs to the agency whose officer wrote it, so which office holds a report from Tinley Park 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: Tinley Park public records, Cook County police reports, Tinley Park arrest records, Tinley Park warrants, Tinley Park inmate search, Tinley Park criminal records, Illinois arrest records and Illinois inmate search.
Which Agency Holds a Report from Tinley Park
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 Tinley Park that is the agency that reports to the FBI for the city (filed by the FBI as Tinley Park Police Department); outside it, the Cook County Sheriff's Office.
The FBI's agency list also places 14 campus police departments and 15 other agencies in Cook County, each with a records office of its own.
The Elgin Police Department, the Buffalo Grove Police Department, the Deerfield Police Department and eight more are each listed by the FBI across several counties including Cook County, so their arrests are not broken out for Cook County here.
Reports from the Tinley Park Police
For Tinley Park, SearchSystems opened and checked the Tinley Park police records page at tinleypark.org/government/departments/police_department/sections/re... (page title: Records), phone (708) 444-5368, Monday, Wednesday, Thursday and Friday; 8:30 a.m. to 7:30 p.m., which answered when SearchSystems opened it on September 25, 2026.
The agency that reports for Tinley Park had 51 violent and 605 property crimes reported for 2025 and reported 768 arrests for 2025.
Reports from the Cook County Sheriff's Office
The Cook County Sheriff's Office is the county agency; it had 876 violent and 1,399 property crimes reported for 2025 and reported 3,038 arrests for 2025.
Its reports come from its records unit. The office's page SearchSystems verified is its custody page, at cookcountyil.gov/service/locate-inmate (page title: Locate an Inmate), which answered when SearchSystems opened it on September 23, 2026.
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, (312) 603-1880, handles discovery for pending cases.
Frequently Asked Questions
How do I get a police report in Tinley Park?
From the agency that took it. The Tinley Park police records page is at tinleypark.org, phone (708) 444-5368; the sheriff's reports come from the Cook County Sheriff's Office.
How long does an agency in Tinley Park 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 Cook 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 Tinley Park 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.