Police and sheriff · Wisconsin

Law Enforcement Agencies in Rock County, Wisconsin

12 agenciesFBI UCR list

The FBI's Uniform Crime Reporting program lists 12 law enforcement agencies in Rock County, Wisconsin: the county sheriff's office and 11 city or town police departments.

Sheriff's Office and County Police in Rock County

  • Rock County Sheriff's OfficeCounty sheriff or police · ORI WI0540000 · NIBRS since 2018

City and Town Police Departments in Rock County

  • Beloit Police DepartmentCity or town police · ORI WI0540100 · NIBRS since 2019
  • Beloit Town Police DepartmentCity or town police · ORI WI0540800 · NIBRS since 2020
  • Brodhead Police DepartmentCity or town police · ORI WI0230200 · NIBRS since 2019
  • Clinton Police DepartmentCity or town police · ORI WI0540500 · NIBRS since 2020
  • Edgerton Police DepartmentCity or town police · ORI WI0540300 · NIBRS since 2017
  • Evansville Police DepartmentCity or town police · ORI WI0540400 · NIBRS since 2018
  • Fulton Police DepartmentCity or town police · ORI WI0541100
  • Janesville Police DepartmentCity or town police · ORI WI0540200 · NIBRS since 2018
  • Milton Police DepartmentCity or town police · ORI WI0540600 · NIBRS since 2018
  • Milton Town Police DepartmentCity or town police · ORI WI0541300
  • Orfordville Police DepartmentCity or town police · ORI WI0540700 · NIBRS since 2020

Where People Arrested in Rock 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 Wisconsin 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 Rock County?
The FBI lists 12 law enforcement agencies in Rock County, including 11 city or town police departments. The full list is on this page.
Who runs the jail in Rock County?
In most counties the sheriff runs the county jail. In Rock County that is the Rock County Sheriff's Office. See Rock 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 WI0540600. It is useful when you request records or read crime statistics.