The following is a list of school districts in Illinois. , there were 852 public school districts, including 368 elementary districts, 97 high school districts, 386 unit districts, and one Illinois Department of Juvenile Justice district, and two cooperative high schools. These districts are organized by regions set by the Illinois State Board of Education and not by the actual county boundaries; school districts can cross county boundaries, and school districts with administrative headquarters and/or schools only in certain counties can include territory in one or more other counties that do not have schools operated by that district. The state classifies Chicago Public Schools as its own classification, and it classifies other school districts in other ways. All school districts are classified as separate governments by the U.S. Census Bureau, and Illinois has no school systems dependent on another layer of government.

Region 01: Adams/Brown/Cass/Morgan/Pike/Scott ROE

Adams County

Brown County

Cass County

Morgan County

Pike County

Scott County

Region 03: Bond/Christian/Effingham/Fayette/Montgomery ROE

Bond County

Christian County

Effingham County

Fayette County

Montgomery County

Region 04: Boone/Winnebago ROE

Boone County

Winnebago County

Region 05: North Cook ISC 1

Cook County

Region 06: West Cook ISC 2

Cook County

Region 07: South Cook ISC 4

Cook County

Region 08: Carroll/Jo Daviess/Stephenson ROE

Carroll County

Jo Daviess County

Stephenson County

Region 09: Champaign/Ford ROE

Champaign County

Ford County

Region 11: Clark/Coles/Cumberland/Douglas/Edgar/Moultrie/Shelby ROE

Clark County

Coles County

Cumberland County

Douglas County

Edgar County

Moultrie County

Shelby County

Region 12: Clay/Crawford/Jasper/Lawrence/Richland ROE

Clay County

Crawford County

Jasper County

Lawrence County

Richland County

Region 13: Clinton/Jefferson/Marion/Washington ROE

Clinton County

Jefferson County

Marion County

Washington County

Region 15: City of Chicago

Cook County

Region 16: DeKalb ROE

DeKalb County

Region 17: DeWitt/Livingston/Logan/McLean ROE

DeWitt County

Livingston County

Logan County

McLean County

Region 19: DuPage ROE

DuPage County

Region 20: Edwards/Gallatin/Hamilton/Hardin/Pope/Saline/Wabash/Wayne/White ROE

Edwards County

Gallatin County

Hamilton County

Hardin County

Pope County

Saline County

Wabash County

Wayne County

White County

Region 21: Franklin/Johnson/Massac/Williamson ROE

Franklin County

Johnson County

Massac County

Williamson County

Region 24: Grundy/Kendall ROE

Grundy County

Kendall County

Region 26: Hancock/Fulton/Schuyler/McDonough ROE

Fulton County

Hancock County

McDonough County

Schuyler County

Region 28: Bureau/Henry/Stark ROE

Bureau County

Henry County

Stark County

Region 30: Alexander/Jackson/Pulaski/Perry/Union ROE

Alexander County

Jackson County

Perry County

Pulaski County

Union County

Region 31: Kane ROE

Kane County

Region 32: Iroquois/Kankakee ROE

Iroquois County

Kankakee County

Region 33: Henderson/Knox/Mercer/Warren ROE

Henderson County

Knox County

Mercer County

Warren County

Region 34: Lake ROE

Lake County

Region 35: LaSalle/Marshall/Putnam ROE

LaSalle County

Marshall County

Putnam County

Region 39: Macon/Piatt ROE

Macon County

Piatt County

Region 40: Calhoun/Green/Jersey/Macoupin ROE

Calhoun County

Greene County

Jersey County

Macoupin County

Region 41: Madison ROE

Madison County

Region 44: McHenry ROE

McHenry County

Region 45: Monroe/Randolph ROE

Monroe County

Randolph County

Region 47: Lee/Ogle/Whiteside ROE

Lee County

Ogle County

Whiteside County

Region 48: Peoria ROE

Peoria County

Region 49: Rock Island ROE

Rock Island County

Region 50: St. Clair ROE

St. Clair County

Region 51: Menard/Sangamon ROE

Menard County

Sangamon County

Region 53: Mason/Tazewell/Woodford ROE

Mason County

Tazewell County

Woodford County

Region 54: Vermilion ROE

Vermilion County

Region 56: Will ROE

Will County

Region 60: Illinois Department of Corrections

Defunct Regions

Defunct School Districts

Adams County

Bureau County

Calhoun County

Carroll County

Champaign County

Christian County

Clark County

Cook County

DeKalb County

DeWitt County

Douglas County

DuPage County

Edgar County

Fayette County

Ford County

Franklin County

Fulton County

Gallatin County

Grundy County

Hancock County

Henderson County

Henry County

Iroquois County

Jackson County

Jefferson County

Jo Daviess County

Johnson County

Kankakee County

Knox County

Lake County

LaSalle County

Lee County

Livingston County

Logan County

Macon County

Macoupin County

Madison County

Marion County

Marshall County

Mason County

Massac County

McDonough County

McHenry County

McLean County

Mercer County

Montgomery County

Moultrie County

Ogle County

Peoria County

Perry County

Piatt County

Pike County

Putnam County

Randolph County

Richland County

Sangamon County

Schuyler County

Shelby County

Stark County

Tazewell County

Vermilion County

Warren County

Washington County

Wayne County

White County

Whiteside County

Woodford County