Enrollments listed are official ones as of September 30, 2014. That is the State Board of Education's official enrollment day for every school in Illinois. We use the school's K-8 figure and do not count the pre-K numbers. For junior highs and middle schools we figure in their feeder schools in order to obtain the K-8 total.
These enrollments are used to determine classes for each sport until November of the next year.
| Collinsville | 4329 | Fairfield | 634 | |
| Carriel-O'Fallon | 2917 | Unity Point | 628 | |
| Fulton-O'Fallon | 2748 | Trico | 616 | |
| Marion | 2473 | Chester | 584 | |
| Mascoutah | 2418 | Red Bud | 564 | |
| Triad | 2412 | Breese | 563 | |
| Highland | 1904 | Christopher | 561 | |
| Waterloo | 1783 | Gallatin County | 541 | |
| Herrin | 1637 | Pinckneyville | 541 | |
| Massac County | 1536 | Smithton | 531 | |
| Carterville | 1534 | Nashville | 485 | |
| Harrisburg | 1515 | North Clay | 477 | |
| Olney East Richland | 1418 | Zeigler-Royalton | 431 | |
| Murphysboro | 1415 | Lebanon | 425 | |
| Mt.Vernon | 1381 | Sesser-Valier | 418 | |
| Carbondale | 1371 | Hardin County | 402 | |
| West Frankfort | 1338 | Marissa | 402 | |
| Centralia | 1288 | Jonesboro | 398 | |
| Benton | 1088 | Vienna | 387 | |
| Mt.Carmel | 1010 | Meridian | 385 | |
| DuQuoin | 984 | Goreville | 368 | |
| Salem | 960 | Wayne City | 367 | |
| Carmi-White Co. | 942 | Okawville | 366 | |
| Flora | 886 | Aviston | 362 | |
| Wesclin | 862 | Cobden | 361 | |
| Hamilton County | 817 | Pope County | 349 | |
| Johnston City | 800 | Cairo | 323 | |
| Carlyle | 783 | Woodlawn | 321 | |
| Eldorado | 776 | Sandoval | 310 | |
| Sparta | 774 | Egyptian | 308 | |
| Millstadt | 762 | Rome | 305 | |
| Anna | 713 | Good Shepherd | 302 | |
| Galatia | 298 | Iuka | 198 | |
| Valmeyer | 298 | St.Paul-Highland | 198 | |
| Albers-Dam. Co-op | 281 | Hoyleton Co-op | 197 | |
| Century | 277 | St.Joseph-Olney | 195 | |
| Field | 276 | Joppa | 189 | |
| Willow Grove Co-op | 272 | Opdyke-Belle Rive | 186 | |
| Holy Trinity-O'Fallon | 265 | New Hope-Fairfield | 185 | |
| OLMC-Herrin | 263 | St.John's Luth-RB | 184 | |
| St.P&P-Waterloo | 262 | Cypres-Bun. Co-op | 182 | |
| Bluford | 262 | Farrington-Kell Co-op | 170 | |
| Central City | 261 | Unity Christ.-Energy | 169 | |
| Elverado | 256 | 1st. Bap.Acad-OF | 161 | |
| Steeleville | 251 | Jasper | 160 | |
| Summersville | 245 | Pinckneyville #204 | 152 | |
| Tamaroa-STB Co-op | 242 | St.Rose | 149 | |
| Dodds-Ina Co-op | 240 | Dongola | 149 | |
| Creal Springs | 238 | St.John Lu.-Chester | 147 | |
| All Saints-Breese | 237 | TSJ/Im.Lu.OK Co-op | 146 | |
| Waltonville | 234 | Bartelso | 136 | |
| Germantown | 231 | Tr.Luth.-Centralia | 127 | |
| Raccoon | 229 | St.Marys-Mt.Carmel | 117 | |
| DeSoto | 226 | Ashley | 117 | |
| Thompsonville | 226 | Lick Creek | 110 | |
| Giant City | 225 | St.Mark's Lu.-S-ville | 103 | |
| St.And. Co-op MB | 225 | St.Marys-Mt.Vernon | 103 | |
| Shawnee | 223 | St.Ann-Nashville | 93 | |
| Selmaville | 222 | St.Libory | 78 | |
| New Simpson Hill | 222 | Tr.Lu.-Hoffman | 65 | |
| Bethel-McClel. Co-op | 207 | |||
