There are eight general regions in Illinois: Central, East Central, Illinois Valley, Northeastern, Northwestern, Southern, Southwestern, and Western. The boundaries of the regions are not clearly defined as they are based on a combination of traditional, geographic, and economic definitions. This results in some overlap of regions.
Region categories are for sites of businesses and organizations with multiple locations in the area or general information sites specifically about the particular region. Do not submit sites to these categories based on the area served by a business but rather by the physical location of the business.

Businesses with multiple locations in an area should submit to the most narrowly-defined area encompassing all locations. Multiple locations within the same city should be submitted to the appropriate Illinois/Localities category. Locations in more than one city in the same county should be submitted to the appropriate Illinois/Counties category. Locations in more than one city in different counties but a single metro area should be submitted to the appropriate Illinois/Metro Areas category. Locations in more than one county or metro area but within the same region should be submitted to the appropriate Illinois/Regions category. Only businesses with locations in more than one region should be submitted to the state-level Illinois category.

Central Illinois consists of the following Illinois counties: Sangamon, Menard, Mason, Logan, Tazewell, Woodford, Livingston, McLean, Dewitt, Macon, Christian, Montogmery, Shelby, Piatt, Moultrie, Effingham, Fayette, and Bond. It also includes the state capitol of Springfield.
Please read the description and submission guidelines for Illinois before submitting sites. Please note that sites for businesses with locations in Sangamon and Menard counties but no others or providing general information pertaining to only those counties should be submitted to the Springfield Metro Area instead of the Central Illinois Region.
East Central Illinois consists of the following Illinois counties: Champaign, Ford, Iroquois, Vermilion, Edgar, Douglas, Coles, Clark, Cumberland, Piatt and Moultrie. The largest cities in the region are Champaign-Urbana, Charleston-Mattoon, and Danville. The largest universities in the region are the University of Illinois in Champaign-Urbana and Eastern Illinois University in Charleston.
Please read the description and submission guidelines for Illinois before submitting sites.
The Illinois Valley region begins in Channahon (Will County) and ends in Peoria (Peoria County). All towns and counties along this path are to be included. This includes the counties of Bureau, La Salle, Stark, Putnam, Marshall, and Peoria as well as parts of Grundy and Will counties.
Please read the description and submission guidelines for Illinois before submitting sites.
Northeastern Illinois is dominated by the greater Chicago metropolitan area, and includes the counties of Boone, Cook, DeKalb, DuPage, Grundy, Kane, Kankakee, Kendall, Lake, McHenry, and Will.

The region is distinguished from the Chicago Metro Area by including Boone County and by excluding Kenosha County in Wisconsin and the Northwest Indiana region.

Please submit only sites for businesses with locations in more than one county of the Northeastern Illinois region or sites with general information about an area spanning more than one county of the region. Do not submit sites to these categories based on the area served by a business but rather by the physical location of the business.

Do not submit business sites to this category that meet the following criteria:

  1. Multiple locations within the same city should be submitted to the appropriate Illinois/Localities category.
  2. Locations in more than one city in the same county should be submitted to the appropriate Illinois/Counties category.
  3. Locations in more than one state but all confined to the Chicago metro area should be submitted to the Chicago Metro Area category.
  4. Businesses with locations inside the region as well as outside the region should be should be submitted to the state-level category (if confined to one state) or to the Midwest Region or higher level Regional categories if location exist in multiple states outside the Chicago Metro Area.
Northwestern Illinois consists of Winnebago, Ogle, Lee, Stephenson, Jo Davies, Carroll, Whiteside, Henry, Rock Island, Mercer, and Boone counties. Rockford and the Quad Cities are metropolitan areas in the region.
Please read the description and submission guidelines for Illinois before submitting sites.
Southern Illinois consists of Jasper, Crawford, Clay, Marion, Washington, and Randolph counties and everything south, including Perry, Jefferson, Wayne, Richland, Lawrence, Wabash, Edwards, White, Hamilton, Franklin, Jackson, Williamson, Saline, Gallatin, Union, Johnson, Pope, Hardin, Alexander, Pulaski, and Massac counties.
Please read the description and submission guidelines for Illinois before submitting sites.
Covers Madison, Bond, Fayette, St. Clair, Clinton, Monroe, Washington, and Randolph counties.
Please read the description and submission guidelines for Illinois before submitting sites.
Western Illinois consists of the following Illinois counties: Henderson, Warren, Knox, Fulton, Hancock, McDonough, Adams, Schuyler, Brown, Cass, Morgan, Scott, Pike, Green, Jersey, Calhoun, and Macoupin.
Please read the description and submission guidelines for Illinois before submitting sites.