Police and sheriff · Illinois

Law Enforcement Agencies in Cook County, Illinois

159 agenciesFBI UCR list

The FBI's Uniform Crime Reporting program lists 159 law enforcement agencies in Cook County, Illinois: the county sheriff's office, 129 city or town police departments, 14 campus police departments and 15 other agencies.

Sheriff's Office and County Police in Cook County

  • Cook County Sheriff's OfficeCounty sheriff or police · ORI IL0160000 · NIBRS since 2022

City and Town Police Departments in Cook County

  • Alsip Police DepartmentCity or town police · ORI IL0160100 · NIBRS since 2021
  • Arlington Heights Police DepartmentCity or town police · ORI IL0160200 · NIBRS since 2021
  • Barrington Hills Police DepartmentCity or town police · ORI IL0160400 · NIBRS since 2020
  • Barrington Police DepartmentCity or town police · ORI IL0160300 · NIBRS since 2021
  • Bartlett Police DepartmentCity or town police · ORI IL0160500 · NIBRS since 2022
  • Bedford Park Police DepartmentCity or town police · ORI IL0160600 · NIBRS since 2022
  • Bellwood Police DepartmentCity or town police · ORI IL0160700 · NIBRS since 2021
  • Berkeley Police DepartmentCity or town police · ORI IL0160800 · NIBRS since 2022
  • Berwyn Police DepartmentCity or town police · ORI IL0160900 · NIBRS since 2022
  • Blue Island Police DepartmentCity or town police · ORI IL0161000 · NIBRS since 2021
  • Bridgeview Police DepartmentCity or town police · ORI IL0161100
  • Broadview Police DepartmentCity or town police · ORI IL0161200
  • Brookfield Police DepartmentCity or town police · ORI IL0161300 · NIBRS since 2023
  • Buffalo Grove Police DepartmentCity or town police · ORI IL0161400 · NIBRS since 2021
  • Burbank Police DepartmentCity or town police · ORI IL0168C00 · NIBRS since 2021
  • Burnham Police DepartmentCity or town police · ORI IL0161500 · NIBRS since 2025
  • Burr Ridge Police DepartmentCity or town police · ORI IL0223100 · NIBRS since 2023
  • Calumet City Police DepartmentCity or town police · ORI IL0161700 · NIBRS since 2023
  • Calumet Park Police DepartmentCity or town police · ORI IL0161800 · NIBRS since 2022
  • Chicago Heights Police DepartmentCity or town police · ORI IL0161900 · NIBRS since 2021
  • Chicago Police DepartmentCity or town police · ORI ILCPD0000 · NIBRS since 2021
  • Chicago Ridge Police DepartmentCity or town police · ORI IL0162000 · NIBRS since 2021
  • Cicero Police DepartmentCity or town police · ORI IL0162100 · NIBRS since 2021
  • Country Club Hills Police DepartmentCity or town police · ORI IL0162200 · NIBRS since 2022
  • Countryside Police DepartmentCity or town police · ORI IL0162300 · NIBRS since 2021
  • Crestwood Police DepartmentCity or town police · ORI IL0162400 · NIBRS since 2020
  • Deerfield Police DepartmentCity or town police · ORI IL0490300 · NIBRS since 2021
  • Des Plaines Police DepartmentCity or town police · ORI IL0162500 · NIBRS since 2021
  • Dixmoor Police DepartmentCity or town police · ORI IL0162600
  • Dolton Police DepartmentCity or town police · ORI IL0162700
  • East Hazel Crest Police DepartmentCity or town police · ORI IL0162900 · NIBRS since 2021
  • Elgin Police DepartmentCity or town police · ORI IL0450600 · NIBRS since 2022
  • Elk Grove Village Police DepartmentCity or town police · ORI IL0163000 · NIBRS since 2021
  • Elmhurst Police DepartmentCity or town police · ORI IL0220700 · NIBRS since 2022
  • Elmwood Park Police DepartmentCity or town police · ORI IL0163100 · NIBRS since 2021
  • Evanston Police DepartmentCity or town police · ORI IL0163200 · NIBRS since 2020
  • Evergreen Park Police DepartmentCity or town police · ORI IL0163300 · NIBRS since 2021
  • Flossmoor Police DepartmentCity or town police · ORI IL0163400 · NIBRS since 2021
  • Forest Park Police DepartmentCity or town police · ORI IL0163500 · NIBRS since 2020
  • Forest View Police DepartmentCity or town police · ORI IL0163600 · NIBRS since 2023
  • Franklin Park Police DepartmentCity or town police · ORI IL0163700 · NIBRS since 2021
  • Glencoe Police DepartmentCity or town police · ORI IL0163800 · NIBRS since 2020
  • Glenview Police DepartmentCity or town police · ORI IL0163900 · NIBRS since 2021
  • Glenwood Police DepartmentCity or town police · ORI IL0164000 · NIBRS since 2021
  • Golf Police DepartmentCity or town police · ORI IL0164100 · NIBRS since 2021
  • Hanover Park Police DepartmentCity or town police · ORI IL0164200 · NIBRS since 2022
  • Harvey Police DepartmentCity or town police · ORI IL0164300 · NIBRS since 2022
  • Harwood Heights Police DepartmentCity or town police · ORI IL0164400 · NIBRS since 2023
  • Hazel Crest Police DepartmentCity or town police · ORI IL0164500 · NIBRS since 2022
  • Hickory Hills Police DepartmentCity or town police · ORI IL0164600 · NIBRS since 2022
  • Hillside Police DepartmentCity or town police · ORI IL0164700 · NIBRS since 2022
  • Hinsdale Police DepartmentCity or town police · ORI IL0221000 · NIBRS since 2022
  • Hodgkins Police DepartmentCity or town police · ORI IL0164900 · NIBRS since 2021
  • Hoffman Estates Police DepartmentCity or town police · ORI IL0165000 · NIBRS since 2021
  • Hometown Police DepartmentCity or town police · ORI IL0165100 · NIBRS since 2022
  • Homewood Police DepartmentCity or town police · ORI IL0165200 · NIBRS since 2021
  • Indian Head Park Police DepartmentCity or town police · ORI IL0165300 · NIBRS since 2022
  • Inverness Police DepartmentCity or town police · ORI IL0165400 · NIBRS since 2021
  • Justice Police DepartmentCity or town police · ORI IL0165500 · NIBRS since 2024
  • Kenilworth Police DepartmentCity or town police · ORI IL0165600 · NIBRS since 2021
  • La Grange Park Police DepartmentCity or town police · ORI IL0165800 · NIBRS since 2021
  • La Grange Police DepartmentCity or town police · ORI IL0165700 · NIBRS since 2021
  • Lansing Police DepartmentCity or town police · ORI IL0165900 · NIBRS since 2022
  • Lemont Police DepartmentCity or town police · ORI IL0166000 · NIBRS since 2021
  • Lincolnwood Police DepartmentCity or town police · ORI IL0166100 · NIBRS since 2023
  • Lynwood Police DepartmentCity or town police · ORI IL0166200
  • Lyons Police DepartmentCity or town police · ORI IL0166300
  • Markham Police DepartmentCity or town police · ORI IL0166500
  • Matteson Police DepartmentCity or town police · ORI IL0166600
  • Maywood Police DepartmentCity or town police · ORI IL0166700
  • McCook Police DepartmentCity or town police · ORI IL0166400 · NIBRS since 2023
  • Melrose Park Police DepartmentCity or town police · ORI IL0166800 · NIBRS since 2021
  • Merrionette Park Police DepartmentCity or town police · ORI IL0166900
  • Midlothian Police DepartmentCity or town police · ORI IL0167000 · NIBRS since 2021
  • Morton Grove Police DepartmentCity or town police · ORI IL0167100 · NIBRS since 2021
  • Mount Prospect Police DepartmentCity or town police · ORI IL0167200 · NIBRS since 2021
  • Niles Police DepartmentCity or town police · ORI IL0167300 · NIBRS since 2021
  • Norridge Police DepartmentCity or town police · ORI IL0167400 · NIBRS since 2024
  • North Riverside Police DepartmentCity or town police · ORI IL0167800 · NIBRS since 2022
  • Northbrook Police DepartmentCity or town police · ORI IL0167500 · NIBRS since 2022
  • Northfield Police DepartmentCity or town police · ORI IL0167600 · NIBRS since 2021
  • Northlake Police DepartmentCity or town police · ORI IL0167700 · NIBRS since 2022
  • Oak Brook Police DepartmentCity or town police · ORI IL0221500 · NIBRS since 2022
  • Oak Forest Police DepartmentCity or town police · ORI IL0167900 · NIBRS since 2023
  • Oak Lawn Police DepartmentCity or town police · ORI IL0168000 · NIBRS since 2021
  • Oak Park Police DepartmentCity or town police · ORI IL0168100 · NIBRS since 2022
  • Olympia Fields Police DepartmentCity or town police · ORI IL0168200 · NIBRS since 2021
  • Orland Hills Police DepartmentCity or town police · ORI IL0168B00
  • Orland Park Police DepartmentCity or town police · ORI IL0168300 · NIBRS since 2022
  • Palatine Police DepartmentCity or town police · ORI IL0168400 · NIBRS since 2021
  • Palos Heights Police DepartmentCity or town police · ORI IL0168500 · NIBRS since 2021
  • Palos Hills Police DepartmentCity or town police · ORI IL0168600 · NIBRS since 2021
  • Palos Park Police DepartmentCity or town police · ORI IL0168700 · NIBRS since 2021
  • Park Forest Police DepartmentCity or town police · ORI IL0168800 · NIBRS since 2021
  • Park Ridge Police DepartmentCity or town police · ORI IL0168900 · NIBRS since 2022
  • Phoenix Police DepartmentCity or town police · ORI IL0169000 · NIBRS since 2021
  • Posen Police DepartmentCity or town police · ORI IL0169100 · NIBRS since 2022
  • Prospect Heights Police DepartmentCity or town police · ORI IL0169G00 · NIBRS since 2021
  • Richton Park Police DepartmentCity or town police · ORI IL0169200 · NIBRS since 2022
  • River Forest Police DepartmentCity or town police · ORI IL0169400 · NIBRS since 2021
  • River Grove Police DepartmentCity or town police · ORI IL0169500 · NIBRS since 2021
  • Riverdale Police DepartmentCity or town police · ORI IL0169300 · NIBRS since 2024
  • Riverside Police DepartmentCity or town police · ORI IL0169600 · NIBRS since 2022
  • Robbins Police DepartmentCity or town police · ORI IL0169700
  • Rolling Meadows Police DepartmentCity or town police · ORI IL0169800 · NIBRS since 2021
  • Roselle Police DepartmentCity or town police · ORI IL0221600 · NIBRS since 2022
  • Rosemont Police DepartmentCity or town police · ORI IL0169900 · NIBRS since 2021
  • Sauk Village Police DepartmentCity or town police · ORI IL0161A00 · NIBRS since 2023
  • Schaumburg Police DepartmentCity or town police · ORI IL0162A00 · NIBRS since 2021
  • Schiller Park Police DepartmentCity or town police · ORI IL0163A00
  • Skokie Police DepartmentCity or town police · ORI IL0164A00 · NIBRS since 2020
  • South Barrington Police DepartmentCity or town police · ORI IL0165A00 · NIBRS since 2021
  • South Chicago Heights Police DepartmentCity or town police · ORI IL0166A00 · NIBRS since 2021
  • South Holland Police DepartmentCity or town police · ORI IL0167A00 · NIBRS since 2021
  • Steger Police DepartmentCity or town police · ORI IL0168A00 · NIBRS since 2021
  • Stickney Police DepartmentCity or town police · ORI IL0169A00 · NIBRS since 2021
  • Stone Park Police DepartmentCity or town police · ORI IL0161B00 · NIBRS since 2021
  • Streamwood Police DepartmentCity or town police · ORI IL0162B00 · NIBRS since 2021
  • Summit Police DepartmentCity or town police · ORI IL0163B00 · NIBRS since 2022
  • Thornton Police DepartmentCity or town police · ORI IL0164B00 · NIBRS since 2020
  • Tinley Park Police DepartmentCity or town police · ORI IL0165M00 · NIBRS since 2021
  • University Park Police DepartmentCity or town police · ORI IL0992000 · NIBRS since 2021
  • Westchester Police DepartmentCity or town police · ORI IL0166B00 · NIBRS since 2023
  • Western Springs Police DepartmentCity or town police · ORI IL0167B00 · NIBRS since 2022
  • Wheeling Police DepartmentCity or town police · ORI IL0169B00 · NIBRS since 2021
  • Willow Springs Police DepartmentCity or town police · ORI IL0161C00 · NIBRS since 2021
  • Wilmette Police DepartmentCity or town police · ORI IL0162C00 · NIBRS since 2021
  • Winnetka Police DepartmentCity or town police · ORI IL0163C00 · NIBRS since 2021
  • Worth Police DepartmentCity or town police · ORI IL0164C00 · NIBRS since 2021

College and University Police in Cook County

  • Chicago State UniversityCollege or university police · ORI IL0166L00 · NIBRS since 2021
  • Harper CollegeCollege or university police · ORI IL0169D00 · NIBRS since 2021
  • Loyola University College or university police · ORI IL016AB9E · NIBRS since 2022
  • Moraine Valley Community CollegeCollege or university police · ORI IL0169K00 · NIBRS since 2021
  • Morton CollegeCollege or university police · ORI IL0169F00 · NIBRS since 2021
  • Northeastern Illinois UniversityCollege or university police · ORI IL0166M00 · NIBRS since 2021
  • Northwestern University: ChicagoCollege or university police · ORI IL016AC9E
  • Northwestern University: EvanstonCollege or university police · ORI IL0162X9E
  • Oakton Community CollegeCollege or university police · ORI IL0167E00 · NIBRS since 2021
  • Prairie State CollegeCollege or university police · ORI IL016PS0X
  • South Suburban CollegeCollege or university police · ORI IL0169C00 · NIBRS since 2022
  • Triton CollegeCollege or university police · ORI IL0169E00 · NIBRS since 2025
  • University of Chicago: Cook CountyCollege or university police · ORI IL0169W9E · NIBRS since 2021
  • University of Illinois: ChicagoCollege or university police · ORI IL0166C00 · NIBRS since 2021

Other Law Enforcement Agencies in Cook County

  • Belt RailwayOther agency · ORI IL0162F9E · NIBRS since 2021
  • Burlington Northern Santa Fe RailwayOther agency · ORI IL0164M9E
  • Canadian National RailwayOther agency · ORI IL0164X00
  • Canadian Pacific RailwayOther agency · ORI IL016SL00
  • Chicago Fire Department Arson InvestigationsOther agency · ORI IL0161L00
  • Chicago Heights Park DistrictOther agency · ORI IL016PP00
  • Cook County Forest PreserveOther agency · ORI IL0165K00 · NIBRS since 2022
  • Cook County HospitalOther agency · ORI IL0164K00
  • CSX TransportationOther agency · ORI IL0165H9E
  • Indiana Harbor Belt RailroadOther agency · ORI IL0165F9E
  • Metra Police DepartmentOther agency · ORI IL0169X00 · NIBRS since 2024
  • Metropolitan Water Reclamation District of Greater ChicagoOther agency · ORI IL0163H00 · NIBRS since 2025
  • Norfolk Southern Railway: Cook CountyOther agency · ORI IL0164Z9E
  • Oak Forest Health CenterOther agency · ORI IL0161P00
  • Union Pacific Railroad: Cook CountyOther agency · ORI IL0165N00

Where People Arrested in Cook County Are Held

In most U.S. counties, adults arrested by city police, the sheriff or state troopers are booked into the county jail first. Some larger cities run their own holding jail, so if a person is not on the county roster, call the arresting department.

Law Enforcement in Other Illinois Counties

Agency names, types and ORI codes come from the FBI Crime Data Explorer agency list, retrieved November 2026. NIBRS dates show when an agency began reporting incident-level crime data to the FBI.

Frequently Asked Questions

How many police departments are in Cook County?
The FBI lists 159 law enforcement agencies in Cook County, including 129 city or town police departments. The full list is on this page.
Who runs the jail in Cook County?
In most counties the sheriff runs the county jail. In Cook County that is the Cook County Sheriff's Office. See Cook County Jail — Chicago Police Recent Arrests on this site for the jail's roster or contact details.
What is an ORI number?
An ORI is the nine-character identifier the FBI assigns to each law enforcement agency for crime reporting, for example IL0166800. It is useful when you request records or read crime statistics.