| Name |
County |
| Joliet Catholic Academy |
Will County |
| Joliet Central High School |
Will County |
| Joliet Township High School - Alternate |
Will County |
| Joliet West High School |
Will County |
| Jones College Preparatory High School |
Cook County |
| Josephinum Academy of the Sacred Heart |
Cook County |
| Kaneland High School |
Kane County |
| Kankakee Area Career Center |
Kankakee County |
| Kankakee High School |
Kankakee County |
| Kansas High School |
Edgar County |
| Kelvyn Park High School |
Cook County |
| Kenwood Academy High School |
Cook County |
| Kewanee High School |
Henry County |
| Knoxville High School |
Knox County |
| La Moille High School |
Bureau County |
| La Salle - Peru Township High School |
LaSalle County |
| Lafayette Academy |
Morgan County |
| Lake County High Schools Technology Campus |
Lake County |
| Lake Forest Academy |
Lake County |
| Lake Forest High School |
Lake County |
| Lake Park High School East Campus |
DuPage County |
| Lake Park High School West Campus |
DuPage County |
| Lake View High School |
Cook County |
| Lake Zurich High School |
Lake County |
| Lakes Community High School |
Lake County |
| Lane Technical College Preparatory High School |
Cook County |
| Lanphier High School |
Sangamon County |
| Larkin High School |
Kane County |
| Latino Youth High School |
Cook County |
| Lawrence Correctional Center |
Lawrence County |
| Lawrenceville High School |
Lawrence County |
| Lebanon High School |
St. Clair County |
| Leland High School |
LaSalle County |
| Lemont High School |
Cook County |
| Lena - Winslow High School |
Stephenson County |
| Leo Catholic High School |
Cook County |
| Lexington High School |
McLean County |
| Libertyville High School |
Lake County |
| Limestone Community High School |
Peoria County |
| Linc Alternative High School |
Cook County |
| Lincoln - Way Central High School |
Will County |
| Lincoln - Way West High School |
Will County |
| Lincoln Community High School |
Logan County |
| Lincoln Park High School |
Cook County |
| Lincoln Way East High School |
Will County |
| Lisle High School |
DuPage County |
| Litchfield High School |
Montgomery County |
| Livingston Area Career Center |
Livingston County |
| Lockport Township High School - Central Campus |
Will County |
| Lockport Township High School - East Campus |
Will County |
| Lovejoy Technology Academy |
St. Clair County |
| Loyola Academy |
Cook County |
| Lubavitch Girls High School |
Cook County |
| Lutheran High School |
Sangamon County |
| Lyons Township High School |
Cook County |
| MacArthur High School |
Macon County |
| Macomb Senior High School |
McDonough County |
| Madison Senior High School |
Madison County |
| Mahomet - Seymour High School |
Champaign County |
| Maine East High School |
Cook County |
| Maine South High School |
Cook County |
| Maine West High School |
Cook County |
| Manley High School |
Cook County |
| Manteno High School |
Kankakee County |
| Marengo Community High School |
McHenry County |
| Marian Catholic High School |
Cook County |
| Marian Central Catholic High School |
McHenry County |
| Marion High School |
Williamson County |
| Marist High School |
Cook County |
| Marmion Academy |
Kane County |
| Maroa - Forsyth High School |
Macon County |
| Marquette Catholic High School |
Madison County |
| Marquette High School |
LaSalle County |
| Marshall High School |
Clark County |
| Martin P Mackay Education Center |
Will County |
