Here, by county, is how Illinois` 838 high schools were divided among the regions:
Region 1, Chicago (111 schools)–City of Chicago.
Region 2, north/west suburban: (89 schools)–Lake, parts of Cook, Kane and Du Page.
Region 3, south/west suburban: (95 schools)–Will, Kendall, parts of Cook, Kane and Du Page.
Region 4, northwestern Illinois (145 schools)–Boone, De Kalb, McHenry, Ogle, Winnebago, Carroll, Jo Daviess, Lee, Rock Island, Stephenson, Whiteside, Bureau, Marshall, Peoria, Putnam, Tazewell, Woodford.
Region 5, east central Illinois (132 schools)–Champaign, Clark, Coles, DeWitt, Douglas, Edgar, Ford, Grundy, Iroquois, Kankakee, La Salle, Livingston, Logan, McLean, Macon, Moultrie, Pratt, Vermilion.
Region 6, west central Illinois (135 schools)–Fulton, Hancock, Henderson, Knox, McDonough, Mercer, Stark, Warren, Adams, Brown, Cass, Greene, Macoupin, Mason, Morgan, Pike, Schuyler, Scott, Christian, Fayette, Menard, Montgomery, Sangamon, Shelby.
Region 7, southern Illinois (131 schools)–Bond, Calhoun, Clinton, Jersey, Madison, Marion, St. Clair, Clay, Crawford, Cumberland, Edwards, Effingham, Gallatin, Hamilton, Hardin, Jasper, Lawrence, Pope, Richland, Saline, Wabash, Wayne, White, Alexander, Franklin, Jackson, Jefferson, Johnson, Massac, Monroe, Perry, Pulaski, Randolph, Union, Washington, Williamson.
