Police and sheriff · New Jersey

Law Enforcement Agencies in Union County, New Jersey

26 agenciesFBI UCR list

The FBI's Uniform Crime Reporting program lists 26 law enforcement agencies in Union County, New Jersey: the county sheriff's office, 21 city or town police departments, 1 state police post, 1 campus police department and 2 other agencies.

Sheriff's Office and County Police in Union County

  • Union County Sheriff's OfficeCounty sheriff or police · ORI NJ0200000 · NIBRS since 2023

City and Town Police Departments in Union County

  • Berkeley Heights Township Police DepartmentCity or town police · ORI NJ0200100 · NIBRS since 2021
  • Clark Township Police DepartmentCity or town police · ORI NJ0200200 · NIBRS since 2021
  • Cranford Township Police DepartmentCity or town police · ORI NJ0200300 · NIBRS since 2021
  • Elizabeth Police DepartmentCity or town police · ORI NJ0200400 · NIBRS since 2021
  • Fanwood Police DepartmentCity or town police · ORI NJ0200500 · NIBRS since 2022
  • Garwood Police DepartmentCity or town police · ORI NJ0200600
  • Hillside Township Police DepartmentCity or town police · ORI NJ0200700 · NIBRS since 2021
  • Kenilworth Police DepartmentCity or town police · ORI NJ0200800 · NIBRS since 2021
  • Linden Police DepartmentCity or town police · ORI NJ0200900 · NIBRS since 2024
  • Mountainside Police DepartmentCity or town police · ORI NJ0201000 · NIBRS since 2022
  • New Providence Police DepartmentCity or town police · ORI NJ0201100 · NIBRS since 2024
  • Plainfield Police DepartmentCity or town police · ORI NJ0201200
  • Rahway Police DepartmentCity or town police · ORI NJ0201300 · NIBRS since 2021
  • Roselle Park Police DepartmentCity or town police · ORI NJ0201500 · NIBRS since 2021
  • Roselle Police DepartmentCity or town police · ORI NJ0201400 · NIBRS since 2023
  • Scotch Plains Township Police DepartmentCity or town police · ORI NJ0201600 · NIBRS since 2021
  • Springfield Township Police Department, Union CountyCity or town police · ORI NJ0201700 · NIBRS since 2021
  • Summit Police DepartmentCity or town police · ORI NJ0201800
  • Union Township Police DepartmentCity or town police · ORI NJ0201900 · NIBRS since 2022
  • Westfield Police DepartmentCity or town police · ORI NJ0202000 · NIBRS since 2021
  • Winfield Township Police DepartmentCity or town police · ORI NJ0202100

State Police in Union County

  • State Police: Union CountyState police · ORI NJ020SP00

College and University Police in Union County

  • Kean UniversityCollege or university police · ORI NJ0202400 · NIBRS since 2021

Other Law Enforcement Agencies in Union County

  • Park Police: Union CountyOther agency · ORI NJ0209100 · NIBRS since 2023
  • Prosecutor: Union CountyOther agency · ORI NJ0208900

Where People Arrested in Union 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 New Jersey 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 Union County?
The FBI lists 26 law enforcement agencies in Union County, including 21 city or town police departments. The full list is on this page.
Who runs the jail in Union County?
In most counties the sheriff runs the county jail. In Union County that is the Union County Sheriff's Office. See Union County Jail (Intake & Processing) 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 NJ0201700. It is useful when you request records or read crime statistics.