| Altamont High School | Altamont | IL | 62411 | Effingham |
| Alternative High School | East Saint Louis | IL | 62207 | Saint Clair |
| Althoff Catholic High School | Belleville | IL | 62226 | Saint Clair |
| Anna Jonesboro Community Hs | Anna | IL | 62906 | Union |
| Apostolic Learning Academy | Dupo | IL | 62239 | Saint Clair |
| Beecher City High School | Beecher City | IL | 62414 | Effingham |
| Belleville High School East | Belleville | IL | 62221 | Saint Clair |
| Belleville Township Hs West | Belleville | IL | 62223 | Saint Clair |
| Benton Consolidated Hs | Benton | IL | 62812 | Franklin |
| Berean Christian School | Fairview Heights | IL | 62208 | Saint Clair |
| Brehm Preparatory School | Carbondale | IL | 62901 | Jackson |
| Brownstown High School | Brownstown | IL | 62418 | Fayette |
| Cahokia High School | Cahokia | IL | 62206 | Saint Clair |
| Cairo High School | Cairo | IL | 62914 | Alexander |
| Caledonia Christian Academy | Olmsted | IL | 62970 | Pulaski |
| Calvary Baptist Academy | Belleville | IL | 62221 | Saint Clair |
| Camelot School | Cairo | IL | 62914 | Alexander |
| Carbondale Community Hs | Carbondale | IL | 62901 | Jackson |
| Carlyle High School | Carlyle | IL | 62231 | Clinton |
| Carmi Christian School | Carmi | IL | 62821 | White |
| Carmi-White County High School | Carmi | IL | 62821 | White |
| Carriers Mills High School | Carrier Mills | IL | 62917 | Saline |
| Carterville High School | Carterville | IL | 62918 | Williamson |
| Casey Westfield Jr-Sr Hs | Casey | IL | 62420 | Clark |
| Central Community High School | Breese | IL | 62230 | Clinton |
| Centralia High School | Centralia | IL | 62801 | Marion |
| Century High School | Ullin | IL | 62992 | Pulaski |
| Chester High School | Chester | IL | 62233 | Randolph |
| Childrens Center Behavior Dvlp | Centreville | IL | 62203 | Saint Clair |
| Christ Our Rock Lutheran Hs | Centralia | IL | 62801 | Marion |
| Christ Our Savior Lutheran Hs | Evansville | IL | 62242 | Randolph |
| Christian Fellowship School | Du Quoin | IL | 62832 | Perry |
| Christopher High School | Christopher | IL | 62822 | Franklin |
| Cisne High School | Cisne | IL | 62823 | Wayne |
| Clay City High School | Clay City | IL | 62824 | Clay |
| Cobden High School | Cobden | IL | 62920 | Union |
| Collinsville High School | Collinsville | IL | 62234 | Saint Clair |
| Coulterville High School | Coulterville | IL | 62237 | Randolph |
| Crab Orchard High School | Marion | IL | 62959 | Williamson |
| Cumberland High School | Toledo | IL | 62468 | Cumberland |
| Dieterich Community School | Dieterich | IL | 62424 | Effingham |
| Dongola High School | Dongola | IL | 62926 | Union |
| Dupo Senior High School | Dupo | IL | 62239 | Saint Clair |
| Duquoin High School | Du Quoin | IL | 62832 | Perry |
| East Richland High School | Olney | IL | 62450 | Richland |
| East Saint Louis Senior Hs | East Saint Louis | IL | 62205 | Saint Clair |
| Edwards County High School | Albion | IL | 62806 | Edwards |
| Effingham High School | Effingham | IL | 62401 | Effingham |
| Egyptian Community Unit Dist 5 | Tamms | IL | 62988 | Alexander |
| Eldorado High School | Eldorado | IL | 62930 | Saline |
| Elverado High School | Elkville | IL | 62932 | Jackson |
| Equality Christian Center | Equality | IL | 62934 | Gallatin |
| Ezra Christian School | West Frankfort | IL | 62896 | Franklin |
| Fairfield Community Hs | Fairfield | IL | 62837 | Wayne |
| Faith Academy | Flora | IL | 62839 | Clay |
| Faith Baptist School | Belleville | IL | 62220 | Saint Clair |
| Faith Christian Sch00l | Willisville | IL | 62997 | Perry |
| Fayette Christian Acad & Hs | Vandalia | IL | 62471 | Fayette |
| First Baptist Academy | Cahokia | IL | 62206 | Saint Clair |
| Flora High School | Flora | IL | 62839 | Clay |
| Frankfort Cmty High School | West Frankfort | IL | 62896 | Franklin |
| Freeburg High School | Freeburg | IL | 62243 | Saint Clair |
| Galatia High School | Galatia | IL | 62935 | Saline |
| Gallatin County High School | Junction | IL | 62954 | Gallatin |
| Goreville Community Unit 1 | Goreville | IL | 62939 | Johnson |
| Governor French Academy | Belleville | IL | 62220 | Saint Clair |
| Grace Christian School | Johnston City | IL | 62951 | Williamson |
| Grayville High School | Grayville | IL | 62844 | White |
| Hamilton County Senior High | Mc Leansboro | IL | 62859 | Hamilton |
| Hardin County High School | Elizabethtown | IL | 62931 | Hardin |
| Harrisburg High School | Harrisburg | IL | 62946 | Saline |
| Heritage Christian School | Newton | IL | 62448 | Jasper |
| Herrin High School | Herrin | IL | 62948 | Williamson |
| Hutsonville High School | Hutsonville | IL | 62433 | Crawford |
| Johnston City High School | Johnston City | IL | 62951 | Williamson |
| Joppa Community High School | Joppa | IL | 62953 | Massac |
| Lawrenceville High School | Lawrenceville | IL | 62439 | Lawrence |
| Lebanon High School | Lebanon | IL | 62254 | Saint Clair |
| Living Hope Flwshp Chrstn Sch | Grand Chain | IL | 62941 | Pulaski |
| Lovejoy Technology Academy | Lovejoy | IL | 62059 | Saint Clair |
| Marion High School | Marion | IL | 62959 | Williamson |
| Marissa Junior-Senior Hs | Marissa | IL | 62257 | Saint Clair |
| Marshall Community High School | Marshall | IL | 62441 | Clark |
| Martinsville Jr-Sr High School | Martinsville | IL | 62442 | Clark |
| Mascoutah High School | Mascoutah | IL | 62258 | Saint Clair |
| Massac County High School | Metropolis | IL | 62960 | Massac |
| Mater Dei High School | Breese | IL | 62230 | Clinton |
| Meridian High School | Mounds | IL | 62964 | Pulaski |
| Mount Carmel High School | Mount Carmel | IL | 62863 | Wabash |
| Mount Vernon Christian School | Mount Vernon | IL | 62864 | Jefferson |
| Mount Vernon Township Hs | Mount Vernon | IL | 62864 | Jefferson |
| Murphysboro High School | Murphysboro | IL | 62966 | Jackson |
| Nashville Community Hs | Nashville | IL | 62263 | Washington |
| Neoga High School | Neoga | IL | 62447 | Cumberland |
| New Approach School | Vandalia | IL | 62471 | Fayette |
| New Athens Cmty Unit Dist #60 | New Athens | IL | 62264 | Saint Clair |
| Newton Community High School | Newton | IL | 62448 | Jasper |
| Norris-City-Omaha-Enfield Hs | Norris City | IL | 62869 | White |
| North Clay High School | Louisville | IL | 62858 | Clay |
| O Fallon Township High School | O Fallon | IL | 62269 | Saint Clair |
| Oak Valley Christian Academy | Ramsey | IL | 62080 | Montgomery |
| Oblong High School | Oblong | IL | 62449 | Crawford |
| Odin High School | Odin | IL | 62870 | Marion |
| Okawville High School | Okawville | IL | 62271 | Washington |
| Olive Branch Christian Academy | Olive Branch | IL | 62969 | Alexander |
| Olney Christian Academy | Olney | IL | 62450 | Richland |
| Palestine High School | Palestine | IL | 62451 | Crawford |
| Patoka Community High School | Patoka | IL | 62875 | Marion |
| Pinckneyville Christian Acad | Pinckneyville | IL | 62274 | Perry |
| Pinckneyville Cmty Hs | Pinckneyville | IL | 62274 | Perry |
| Pope County High School | Golconda | IL | 62938 | Pope |
| Project E.c.h.o. | Johnston City | IL | 62951 | Williamson |
| Ramsey High School | Ramsey | IL | 62080 | Fayette |
| Red Bud Community High School | Red Bud | IL | 62278 | Randolph |
| Red Hill High School | Bridgeport | IL | 62417 | Lawrence |
| Robinson High School | Robinson | IL | 62454 | Crawford |
| Saint Anthony High School | Effingham | IL | 62401 | Effingham |
| Saint Elmo High School | Saint Elmo | IL | 62458 | Fayette |
| Salem Community High School | Salem | IL | 62881 | Marion |
| Sandoval Senior High School | Sandoval | IL | 62882 | Marion |
| Sesser-Valier High School | Sesser | IL | 62884 | Franklin |
| Shawnee High School | Wolf Lake | IL | 62998 | Union |
| Siu East St Louis Charter Sch | East Saint Louis | IL | 62201 | Saint Clair |
| South Central High School | Farina | IL | 62838 | Fayette |
| Sparta High School | Sparta | IL | 62286 | Randolph |
| Steeleville Community Hs | Steeleville | IL | 62288 | Randolph |
| Teutopolis High School | Teutopolis | IL | 62467 | Effingham |
| Thompsonville High School | Thompsonville | IL | 62890 | Franklin |
| Tomorrows Builders Youthbuild | East Saint Louis | IL | 62205 | Saint Clair |
| Trico Senior High School | Campbell Hill | IL | 62916 | Jackson |
| Trinity High School | Carbondale | IL | 62901 | Jackson |
| Unity Christian School | Herrin | IL | 62948 | Williamson |
| Vandalia Community High School | Vandalia | IL | 62471 | Fayette |
| Victory Christian Academy | Mount Vernon | IL | 62864 | Jefferson |
| Victory Christian Academy | Carterville | IL | 62918 | Williamson |
| Vienna High School | Vienna | IL | 62995 | Johnson |
| Vincent Gray Alternative Hs | East Saint Louis | IL | 62202 | Saint Clair |
| Waltonville High School | Waltonville | IL | 62894 | Jefferson |
| Wayne City High School | Wayne City | IL | 62895 | Wayne |
| Webber Township High School | Bluford | IL | 62814 | Jefferson |
| Wesclin Jr-Sr High School | Trenton | IL | 62293 | Clinton |
| West Richland High School | Noble | IL | 62868 | Richland |
| Westside Christian Academy | Robinson | IL | 62454 | Crawford |
| Woodlawn Community High School | Woodlawn | IL | 62898 | Jefferson |
| Zeigler Christian Academy | Zeigler | IL | 62999 | Franklin |
| Zeigler-Royalton High School | Zeigler | IL | 62999 | Franklin |
