Police and sheriff · Illinois

Law Enforcement Agencies in DeKalb County, Illinois

13 agenciesFBI UCR list

The FBI's Uniform Crime Reporting program lists 13 law enforcement agencies in DeKalb County, Illinois: the county sheriff's office, 11 city or town police departments and 1 campus police department.

Sheriff's Office and County Police in DeKalb County

  • DeKalb County Sheriff's OfficeCounty sheriff or police · ORI IL0190000 · NIBRS since 2021

City and Town Police Departments in DeKalb County

  • Cortland Police DepartmentCity or town police · ORI IL0190700 · NIBRS since 2021
  • DeKalb Police DepartmentCity or town police · ORI IL0190800 · NIBRS since 2021
  • Genoa Police DepartmentCity or town police · ORI IL0190100 · NIBRS since 2021
  • Hinckley Police DepartmentCity or town police · ORI IL0190200 · NIBRS since 2022
  • Kingston Police DepartmentCity or town police · ORI IL0191300 · NIBRS since 2021
  • Kirkland Police DepartmentCity or town police · ORI IL0190900 · NIBRS since 2021
  • Maple Park Police DepartmentCity or town police · ORI IL0451800 · NIBRS since 2021
  • Sandwich Police DepartmentCity or town police · ORI IL0190300 · NIBRS since 2021
  • Somonauk Police DepartmentCity or town police · ORI IL0190400 · NIBRS since 2021
  • Sycamore Police DepartmentCity or town police · ORI IL0190500 · NIBRS since 2021
  • Waterman Police DepartmentCity or town police · ORI IL0190600 · NIBRS since 2023

College and University Police in DeKalb County

  • Northern Illinois UniversityCollege or university police · ORI IL0191100 · NIBRS since 2021

Where People Arrested in DeKalb 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 DeKalb County?
The FBI lists 13 law enforcement agencies in DeKalb County, including 11 city or town police departments. The full list is on this page.
Who runs the jail in DeKalb County?
In most counties the sheriff runs the county jail. In DeKalb County that is the DeKalb County Sheriff's Office. See DeKalb County Jail 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 IL0191100. It is useful when you request records or read crime statistics.