| 2012 SIJHSAA BASEBALL ENROLLMENTS | ||||
| CLASS L | CLASS M | |||
| Collinsville | 4526 | Trico | 671 | |
| Marion | 2508 | Grant | 631 | |
| Triad | 2342 | Chester | 628 | |
| Carriel-O'Fallon | 2150 | Unity Point | 626 | |
| Highland | 1975 | Fairfield | 601 | |
| Fulton-O'Fallon | 1897 | Christopher | 586 | |
| Waterloo | 1797 | Breese | 582 | |
| Herrin | 1636 | Red Bud | 582 | |
| Belleville Central | 1572 | Shiloh | 580 | |
| Harrisburg | 1480 | Pinckneyville | 573 | |
| Carbondale | 1425 | Gallatin County | 556 | |
| Murphysboro | 1424 | Smithton | 501 | |
| Mt.Vernon | 1416 | Sesser-Valier | 496 | |
| Carterville | 1385 | Nashville | 488 | |
| Massac Coounty | 1355 | North Clay | 483 | |
| Centralia | 1292 | Albion | 464 | |
| West Frankfort | 1276 | Meridian | 460 | |
| Benton | 1058 | South Central | 444 | |
| DuQuoin | 1033 | Lebanon | 435 | |
| Salem | 918 | Zeigler-Royalton | 425 | |
| Flora | 918 | Hardin County | 420 | |
| Wesclin | 908 | Cobden | 406 | |
| Carmi | 905 | Marissa | 398 | |
| Wolf Branch | 854 | Goreville | 394 | |
| Millstadt | 852 | Wayne City | 388 | |
| Hamilton County | 825 | Vienna | 386 | |
| Carlyle | 794 | Aviston | 367 | |
| Eldorado | 783 | Pope County | 366 | |
| Johnston City | 779 | Jonesboro | 366 | |
| Dupo | 778 | Okawville | 357 | |
| Anna | 752 | New Athens | 347 | |
| Sparta | 690 | Valmeyer | 346 | |
| CLASS S | ||||
| Norris City-Omaha | 345 | Grayville | 197 | |
| Egyptian | 342 | Cypress-Buncomb Co-op | 197 | |
| Sandoval | 333 | Joppa | 197 | |
| Good Shepherd-Collins. | 324 | New Hope | 190 | |
| Woodlawn | 320 | Odin | 190 | |
| Cairo | 319 | St.Andrew Co-op | 189 | |
| Century | 316 | Bethel-McClellan Co-op | 186 | |
| Elverado | 313 | Altamont-St.Peter Co-op | 186 | |
| Carrier Mills | 312 | West Salem | 185 | |
| Rome | 297 | Opdyke Belle-Rive | 180 | |
| Galatia | 290 | St.Ann-TSJ Co-op | 180 | |
| St.Paul Cath.-Highland | 289 | Creal Springs | 178 | |
| St.Peter-Paul Cath.-Wat. | 286 | Unity Christian-Herrin | 176 | |
| Cisne | 286 | Willow Grove | 175 | |
| Crab Orchard | 284 | Patoka | 168 | |
| OLMC-Herrin | 278 | Coulterville | 167 | |
| Field | 273 | Jefferson-Metropolis | 166 | |
| Shawnee | 272 | Pinckneyville #204 | 163 | |
| Steeleville | 270 | Prairie DuRocher | 150 | |
| Bluford | 267 | Trinity Luth.-Edwardsville | 146 | |
| Jasper-Geff Co-op | 266 | Dongola | 145 | |
| Giant City | 258 | Evansville | 143 | |
| Summersville | 257 | St.John Luth.-Chester | 142 | |
| W. Grove-St.Mary Co-op | 255 | Ashley | 139 | |
| Waltonville | 249 | St.Marys Cath.-Mt.Vernon | 137 | |
| DeSoto | 245 | Lick Creek | 134 | |
| New Simpson Hill | 241 | St.John Luth.-Red Bud | 133 | |
| St.Bruno-Tamaroa Co-op | 235 | Enfield | 126 | |
| Central City | 231 | Dodds | 121 | |
| Noble | 229 | St.Mark's Lu.-Steeleville | 102 | |
| Iuka | 222 | Ina | 99 | |
| Hoyleton Co-op | 220 | St. Libory | 89 | |
| Ewing | 218 | St.Marys Cath.-Chester | 84 | |
| Thompsonville | 208 | St.Johns Cath.-Red Bud | 80 | |
| Clay City | 201 | St.John Cath.-W. Frankfort | 79 | |