| Lake Central High School | Saint John | High | 09-12 | 3,069 | · |
| Crown Point High School | Crown Point | High | 09-12 | 2,948 | · |
| Merrillville High School | Merrillville | High | 09-12 | 2,042 | · |
| Hammond Central High School | Hammond | High | 09-12 | 1,863 | · |
| Morton Senior High School | Hammond | High | 09-12 | 1,609 | · |
| Munster High School | Munster | High | 09-12 | 1,564 | · |
| 21st Century Charter Sch of Gary | Gary | Other | KG-12 | 1,337 | · |
| Hobart High School | Hobart | High | 09-12 | 1,306 | · |
| Gary Lighthouse Charter School | Gary | Other | KG-12 | 1,127 | · |
| Robert Taft Middle School | Crown Point | Middle | 06-08 | 1,091 | · |
| East Chicago Central High School | East Chicago | High | 09-12 | 1,079 | · |
| Hal E Clark Middle School | Saint John | Middle | 05-08 | 1,069 | · |
| Griffth Jr/Sr High School | Griffith | High | 06-12 | 1,059 | · |
| Colonel John Wheeler Middle School | Crown Point | Middle | 06-08 | 1,046 | · |
| Lowell Senior High School | Lowell | High | 09-12 | 1,033 | · |
| West Side Leadership Academy | Gary | High | 09-12 | 1,013 | · |
| Highland High School | Highland | High | 09-12 | 987 | · |
| Kahler Middle School | Dyer | Middle | 05-08 | 922 | · |
| Pierce Middle School | Merrillville | Middle | 07-08 | 919 | · |
| Hobart Middle School | Hobart | Middle | 06-08 | 917 | · |
| Wilbur Wright Middle School | Munster | Middle | 06-08 | 908 | · |
| Henry W Eggers Middle School | Hammond | Middle | 07-08 | 855 | · |
| Merrillville Intermediate School | Merrillville | Middle | 05-06 | 855 | · |
| Thea Bowman Leadership Academy | Gary | Other | KG-12 | 840 | · |
| Hanover Central High School | Cedar Lake | High | 09-12 | 782 | · |
| Michael Grimmer Middle School | Schererville | Middle | 05-08 | 754 | · |
| Lake Street Elementary School | Crown Point | Elementary | KG-05 | 743 | · |
| Lowell Middle School | Lowell | Middle | 06-08 | 742 | · |
| Charles N Scott Middle School | Hammond | Middle | 07-08 | 738 | · |
| Washington Irving Elementary Sch | Hammond | Elementary | PK-06 | 728 | · |
| Highland Middle School | Highland | Middle | 06-08 | 726 | · |
| Kolling Elementary School | Saint John | Elementary | PK-04 | 695 | · |
| Joseph Hess Elementary School | Hammond | Elementary | PK-06 | 688 | · |
| Frank H Hammond Elementary School | Munster | Elementary | PK-05 | 685 | · |
| Charter School of the Dunes | Gary | Elementary | KG-08 | 684 | · |
| Warren G Harding Elementary School | Hammond | Elementary | PK-06 | 684 | · |
| Annie Burns-Hicks Elementary School | Hammond | Elementary | PK-06 | 669 | · |
| Aspire Charter Academy | Gary | Elementary | KG-08 | 666 | · |
| Thomas A Edison Elementary School | Hammond | Elementary | PK-06 | 665 | · |
| James H Watson Elementary School | Schererville | Elementary | PK-04 | 656 | · |
| Hanover Central Middle School | Cedar Lake | Middle | 06-08 | 650 | · |
| Dwight D Eisenhower Elem School | Crown Point | Elementary | PK-05 | 644 | · |
| Calumet New Tech High School | Gary | High | 09-12 | 619 | · |
| Red Cedars Elementary | Cedar Lake | Elementary | 03-05 | 619 | · |
| Thomas A Edison Jr-Sr HS | Lake Station | High | 06-12 | 616 | · |
| Protsman Elementary School | Dyer | Elementary | PK-04 | 610 | · |
| Jonas E Salk Elementary School | Merrillville | Elementary | PK-04 | 587 | · |
| George Bibich Elementary School | Dyer | Elementary | PK-04 | 572 | · |
| Hammond Academy of Science & Tech | Hammond | High | 06-12 | 564 | · |
| Oak Hill Elementary School | Lowell | Elementary | KG-05 | 563 | · |
| Winfield Elementary School | Crown Point | Elementary | PK-02 | 561 | · |
| Veterans Elementary School at Mundell | Hobart | Elementary | 01-05 | 560 | · |
| Abraham Lincoln Elementary School | Hammond | Elementary | PK-06 | 546 | · |
| Frank O'Bannon Elementary School | Hammond | Elementary | PK-06 | 544 | · |
| Timothy Ball Elementary School | Crown Point | Elementary | KG-05 | 540 | · |
| River Forest High School | Hobart | High | 09-12 | 532 | · |
| Solon Robinson Elementary School | Crown Point | Elementary | KG-05 | 528 | · |
| Glen Park Acad for Excel in Lrn | Gary | Elementary | KG-05 | 524 | · |
| Jerry Ross Elementary School | Crown Point | Elementary | 03-05 | 524 | · |
| Longfellow New Tech Elementary Sch | Gary | Elementary | KG-04 | 524 | · |
| Three Creeks Elem School | Lowell | Elementary | KG-05 | 515 | · |
| James B Eads Elementary School | Munster | Elementary | KG-05 | 507 | · |
| Joan Martin Elementary School | Hobart | Elementary | 01-05 | 501 | · |
| Homer Iddings Elementary School | Merrillville | Elementary | PK-04 | 488 | · |
| William McKinley Elementary School | East Chicago | Elementary | KG-06 | 488 | · |
| Joseph Block Middle School | East Chicago | Middle | 07-08 | 487 | · |
| Lake Ridge New Tech Middle School | Gary | Middle | 05-08 | 476 | · |
| Morton Elementary School | Hammond | Elementary | PK-06 | 476 | · |
| Homan Elementary School | Schererville | Elementary | PK-04 | 475 | · |
| East Chicago Lighthouse | East Chicago | Elementary | KG-08 | 473 | · |
| Ernest R Elliott Elementary School | Munster | Elementary | KG-05 | 472 | · |
| Peifer Elementary School | Schererville | Elementary | PK-04 | 471 | · |
| Lew Wallace Elementary School | Hammond | Elementary | PK-06 | 465 | · |
| Elsie Wadsworth Elementary School | Griffith | Elementary | PK-02 | 464 | · |
| George Washington Elementary Sch | East Chicago | Elementary | KG-06 | 462 | · |
| Henry P Fieler Elementary School | Merrillville | Elementary | PK-04 | 447 | · |
| Beiriger Elementary School | Griffith | Elementary | PK-05 | 443 | · |
| Daniel Hale Williams Elem Sch | Gary | Elementary | KG-05 | 442 | · |
| Whiting High School | Whiting | High | 09-12 | 441 | · |
| Douglas MacArthur Elem School | Cedar Lake | Elementary | PK-05 | 439 | · |
| Thomas Jefferson Elementary School | Hammond | Elementary | PK-06 | 439 | · |
| East Chicago Urban Enterprise Academy | East Chicago | Elementary | KG-08 | 423 | · |
| Liberty Elementary School | Hobart | Elementary | 01-05 | 423 | · |
| Lake Prairie Elementary School | Lowell | Elementary | KG-05 | 416 | · |
| Frankie Woods McCullough Academy | Gary | Elementary | PK-05 | 411 | · |
| Southridge Elementary School | Highland | Elementary | KG-05 | 398 | · |
| Benjamin Harrison Elementary Sch | East Chicago | Elementary | KG-06 | 396 | · |
| Nathan Hale Elementary School | Whiting | Elementary | PK-05 | 391 | · |
| Henry S Evans Elementary School | Lake Station | Elementary | PK-05 | 389 | · |
| Bailly Middle School | Gary | Middle | 06-08 | 383 | · |
| River Forest Middle School | Hobart | Middle | 06-08 | 379 | · |
| Jane Ball Elementary School | Cedar Lake | Elementary | PK-02 | 371 | · |
| Judith Morton Johnston Elementary | Highland | Elementary | PK-05 | 364 | · |
| Edgar L Miller Elementary School | Merrillville | Elementary | PK-04 | 351 | · |
| John I Meister Elementary School | Hobart | Elementary | KG-05 | 346 | · |
| Steel City Academy | Gary | Other | KG-12 | 343 | · |
| Gary Middle School | Gary | Middle | 06-08 | 326 | · |
| John Wood Elementary School | Merrillville | Elementary | PK-04 | 315 | · |
| Lincoln Elementary School | Cedar Lake | Elementary | KG-02 | 312 | · |
| Beveridge Elementary School | Gary | Elementary | KG-05 | 310 | · |
| Early Learning Center-George Earle | Hobart | Elementary | PK-KG | 307 | · |
| Banneker Elementary at Marquette | Gary | Elementary | KG-05 | 299 | · |
| Abraham Lincoln Elementary School | East Chicago | Elementary | KG-06 | 286 | · |
| Benjamin Franklin Elementary Sch | Whiting | Elementary | PK-06 | 283 | · |
| Virgil I Bailey Elementary School | Lake Station | Elementary | KG-05 | 270 | · |
| Whiting Middle School | Whiting | Middle | 06-08 | 270 | · |
| Allen J Warren Elementary School | Highland | Elementary | KG-05 | 267 | · |
| Mildred Merkley Elementary School | Highland | Elementary | KG-05 | 265 | · |
| Kenwood Elementary School | Hammond | Elementary | PK-06 | 253 | · |
| Alexander Hamilton Elementary Sch | Lake Station | Elementary | KG-05 | 239 | · |
| Higher Institute of Arts & Tech | Merrillville | Elementary | KG-08 | 208 | · |
| Mary M Bethune Early Child Dev Ctr | Gary | Elementary | PK-KG | 199 | · |
| Excel Center - Hammond | Hammond | High | 09-12 | 195 | · |
| Gary Middle College | Gary | High | 09-12 | 176 | · |
| Gary Virtual Academy | Gary | Other | KG-12 | 169 | · |
| Carrie Gosch PK Center | East Chicago | Prekindergarten | PK-PK | 150 | · |
| Excel Center - Gary | Gary | High | 09-12 | 145 | · |
| Area Career Center | Hammond | High | 06-12 | 0 | · |
| Eagle Park Community School | Crown Point | Other | KG-12 | 0 | · |
| Gary Career Center | Gary | High | 06-12 | 0 | · |