Business listing by county and name in Illinois (IL):

 Cook County:

 DuPage County:

 Lake County:

 Will County:

 Kane County:

 McHenry County:

 Winnebago County:

 Madison County:

 Peoria County:

 Sangamon County:

 Saint Clair County:

 Champaign County:

 McLean County:

 Rock Island County:

 Macon County:

 Kankakee County:

 DeKalb County:

 Tazewell County

 Kendall County

 Henry County

 Coles County

 Vermilion County

 Williamson County

 Adams County

 Jackson County

 Effingham County

 Whiteside County

 Stephenson County

 Grundy County

 Macoupin County

 Ogle County

 McDonough County

 Knox County

 Jefferson County

 Franklin County

 Marion County

 Morgan County

 Bureau County

 Montgomery County

 Livingston County

 Randolph County

 Iroquois County

 Boone County

 Christian County

 Monroe County

 Woodford County

 Jo Daviess County

 Fulton County

 Logan County

 Clinton County

 Shelby County

 Douglas County

 Lee County

 Saline County

 Jersey County

 Hancock County

 Fayette County

 Crawford County

 Edgar County

 Clark County

 Mercer County

 Piatt County

 Wayne County

 White County

 Warren County

 Richland County

 Pike County

 Lawrence County

 Union County

 Ford County

 Perry County

 Cass County

 Clay County

 Bond County

 Washington County

 Moultrie County

 Massac County

 Carroll County

 Wabash County

 Schuyler County

 Greene County

 Marshall County

 Mason County

 Johnson County

 Jasper County

 Cumberland County

 Menard County

 Edwards County

 Gallatin County

 Putnam County

 Henderson County

 Hamilton County

 Calhoun County

 Brown County

 LaSalle County

 Hardin County

 Stark County

 Pulaski County

 Alexander County

 Pope County

 Scott County

 De Witt County