Illinois Police Departments List by County
- Adams County Police Departments
- Alexander County Police Departments
- Bond County Police Departments
- Boone County Police Departments
- Brown County Police Departments
- Bureau County Police Departments
- Calhoun County Police Departments
- Carroll County Police Departments
- Cass County Police Departments
- Champaign County Police Departments
- Christian County Police Departments
- Clark County Police Departments
- Clay County Police Departments
- Clinton County Police Departments
- Coles County Police Departments
- Cook County Police Departments
- Cook, Dupage County Police Departments
- Crawford County Police Departments
- Cumberland County Police Departments
- Dekalb County Police Departments
- Dewitt County Police Departments
- Douglas County Police Departments
- Dupage County Police Departments
- Edgar County Police Departments
- Edwards County Police Departments
- Effingham County Police Departments
- Fayette County Police Departments
- Ford County Police Departments
- Franklin County Police Departments
- Fulton County Police Departments
- Gallatin County Police Departments
- Greene County Police Departments
- Grundy County Police Departments
- Hamilton County Police Departments
- Hancock County Police Departments
- Hardin County Police Departments
- Henderson County Police Departments
- Henry County Police Departments
- Iroquois County Police Departments
- Jackson County Police Departments
- Jasper County Police Departments
- Jefferson County Police Departments
- Jersey County Police Departments
- Jo Daviess County Police Departments
- Johnson County Police Departments
- Kane County Police Departments
- Kankakee County Police Departments
- Kendall County Police Departments
- Knox County Police Departments
- Lake County Police Departments
- Lasalle County Police Departments
- Lawrence County Police Departments
- Lee County Police Departments
- Livingston County Police Departments
- Logan County Police Departments
- Macon County Police Departments
- Macoupin County Police Departments
- Madison County Police Departments
- Maine County Police Departments
- Marion County Police Departments
- Marshall County Police Departments
- Mason County Police Departments
- Massac County Police Departments
- Mc Donough County Police Departments
- Mc Henry County Police Departments
- Mc Lean County Police Departments
- Mcdonough County Police Departments
- Mchenry County Police Departments
- Mclean County Police Departments
- Menard County Police Departments
- Mercer County Police Departments
- Monroe County Police Departments
- Montgomery County Police Departments
- Morgan County Police Departments
- Moultrie County Police Departments
- Ogle County Police Departments
- Peoria County Police Departments
- Perry County Police Departments
- Piatt County Police Departments
- Pike County Police Departments
- Pope County Police Departments
- Pulaski County Police Departments
- Putnam County Police Departments
- Randolph County Police Departments
- Richland County Police Departments
- Rock Island County Police Departments
- Saint Clair County Police Departments
- Saline County Police Departments
- Sangamon County Police Departments
- Schuyler County Police Departments
- Scott County Police Departments
- Shelby County Police Departments
- St Clair County Police Departments
- St Louis County Police Departments
- St. Clair County Police Departments
- Stark County Police Departments
- Stephenson County Police Departments
- Tazewell County Police Departments
- Union County Police Departments
- Vermilion County Police Departments
- Wabash County Police Departments
- Warren County Police Departments
- Washington County Police Departments
- Wayne County Police Departments
- White County Police Departments
- Whiteside County Police Departments
- Will County Police Departments
- Will, Kendall County Police Departments
- Williamson County Police Departments
- Winnebago County Police Departments
- Woodford County Police Departments