* Last updated at 1:00 pm on Monday, October 1, 2018
* Last updated at 1:00 pm on Monday, October 1, 2018
The list below gives official IHSA member school enrollments for the 2018-19 school year.
The figure listed under "Enrollment" is the school's enrollment on September 30, 2017, as reported to the Illinois State Board of Education (ISBE), and adjusted by the IHSA according to policy. The figure in the last column, which includes the 1.65 multiplier, is applied to individual sport and activity programs at particular non-boundaried schools, depending on each program's recent success in IHSA state series.
The classification cutoffs for each sport and activity are determined by taking the entire field (excluding individual entries) from the previous school term, updating the enrollment of every entry, and dividing the field into equal groups. This process does not guarantee that this school term's classes will be exactly equal because some schools may add or drop the sport or activity, or may form or dissolve coops.
In the case of similar boys and girls sports that occur during the same sport season, the cutoffs have been made identical by using the higher of the two figures at each cutoff. This policy applies to the following pairs of sports: boys/girls cross country, boys/girls basketball, boys/girls track & field, and boys baseball/girls softball.
| Sport or Activity | Classes | Classification Ranges |
|---|---|---|
| Boys Football | 8 | determined at the end of the regular season |
| Boys Baseball | 4 | 1A: up to 279.00, 2A: 279.01 to 564.30, 3A: 564.31 to 1462.00, 4A: 1462.01 and over |
| Boys Basketball | 4 | 1A: up to 261.00, 2A: 261.01 to 546.00, 3A: 546.01 to 1353.00, 4A: 1353.01 and over |
| Girls Basketball | 4 | 1A: up to 261.00, 2A: 261.01 to 546.00, 3A: 546.01 to 1353.00, 4A: 1353.01 and over |
| Girls Softball | 4 | 1A: up to 279.00, 2A: 279.01 to 564.30, 3A: 564.31 to 1462.00, 4A: 1462.01 and over |
| Girls Volleyball | 4 | 1A: up to 233.00, 2A: 233.01 to 527.00, 3A: 527.01 to 1335.00, 4A: 1335.01 and over |
| Boys Cross Country | 3 | 1A: up to 647.00, 2A: 647.01 to 1615.00, 3A: 1615.01 and over |
| Girls Cross Country | 3 | 1A: up to 647.00, 2A: 647.01 to 1615.00, 3A: 1615.01 and over |
| Competitive Cheerleading | 3 | S: up to 628.00, M: 628.01 to 1656.60, L: 1656.61 and over, C: by choice |
| Competitive Dance | 3 | 1A: up to 1195.00, 2A: 1195.01 to 1978.00, 3A: 1978.01 and over |
| Boys Golf | 3 | 1A: up to 524.00, 2A: 524.01 to 1486.65, 3A: 1486.66 and over |
| Boys Soccer | 3 | 1A: up to 662.00, 2A: 662.01 to 1476.00, 3A: 1476.01 and over |
| Girls Soccer | 3 | 1A: up to 726.00, 2A: 726.01 to 1638.00, 3A: 1638.01 and over |
| Boys Track & Field | 3 | 1A: up to 477.00, 2A: 477.01 to 1279.00, 3A: 1279.01 and over |
| Girls Track & Field | 3 | 1A: up to 477.00, 2A: 477.01 to 1279.00, 3A: 1279.01 and over |
| Boys Wrestling | 3 | 1A: up to 647.00, 2A: 647.01 to 1611.00, 3A: 1611.01 and over |
| Girls Golf | 2 | 1A: up to 983.00, 2A: 983.01 and over |
| Boys Tennis | 2 | 1A: up to 1476.00, 2A: 1476.01 and over |
| Girls Tennis | 2 | 1A: up to 1404.00, 2A: 1404.01 and over |
| Music Organization | 5 | D: up to 183.00, C: 183.01 to 324.00, B: 324.01 to 560.00, A: 560.01 to 1243.00, AA: 1243.01 and over |
| Music Solo & Ensemble | 5 | D: up to 183.00, C: 183.01 to 324.00, B: 324.01 to 560.00, A: 560.01 to 1243.00, AA: 1243.01 and over |
| Scholastic Bowl | 2 | 1A: up to 503.00, 2A: 503.01 and over |
This is the numeric list of enrollments. You may also view an alphabetical list.
| School | Enrollment | Multiplied Enrollment |
|---|---|---|
| Pittsfield (Pike County Christian Academy) | 4 | 6.60 |
| Buckley (Christ Lutheran) | 7 | 11.55 |
| Rockford (Our Lady of the Sacred Heart) | 20 | 33.00 |
| Rosamond (Faith Bible Christian Academy) | 20 | 33.00 |
| Herrick (Mid-America Preparatory) | 21 | 34.65 |
| Lovejoy | 21 | |
| Elgin (Einstein Academy) | 22 | 36.30 |
| Evansville (Christ Our Savior Lutheran) | 25 | 41.25 |
| Belleville (Governor French Academy) | 26 | 42.90 |
| Rockford (Legacy Academy of Excellence Charter) | 28 | 46.20 |
| Jacksonville (Westfair Christian Academy) | 29 | 47.85 |
| Fulton (Unity Christian) | 34 | 56.10 |
| Ohio | 35 | |
| Chicago (Hales Franciscan) | 40 E | 66.00 |
| Jacksonville (Illinois School for the Visually Impaired) | 40 | 66.00 |
| Yorkville (Y. Christian) | 41 | 67.65 |
| Forsyth (Decatur Christian) | 50 | 82.50 |
| Meredosia (M.-Chambersburg) | 50 | |
| Normal (Calvary Christian Academy) | 52 | 85.80 |
| DeLand (D.-Weldon) | 54 | |
| Yorkville (Parkview Christian Academy) | 56 | 92.40 |
| Clay City | 57 | |
| Coulterville | 59 | |
| Moline (Quad Cities Christian School) | 61 | 100.65 |
| Patoka | 62 | |
| Northfield (Christian Heritage Academy) | 63 | 103.95 |
| Scales Mound | 63 | |
| Bluffs | 64 | |
| Brussels | 64 | |
| Paw Paw | 64 | |
| Virginia | 64 | |
| O'Fallon (First Baptist Academy) | 65 | 107.25 |
| Joppa (J.-Maple Grove) | 66 | |
| Greenview | 69 | |
| Odin | 72 | |
| Dongola | 73 | |
| Kansas | 74 | |
| Brownstown | 75 | |
| Hartsburg (H.-Emden) | 75 | |
| Beecher City | 77 | |
| Oakland | 77 | |
| Pleasant Hill | 77 | |
| Leland | 79 | |
| Williamsfield | 79 | |
| Franklin | 81 | |
| Edinburg | 84 | |
| LaMoille | 84 | |
| Crystal Lake (Faith Lutheran) | 85 | 140.25 |
| Evanston (Roycemore) | 85 | 140.25 |
| Grayville | 86 | |
| Springfield (Calvary) | 89 | 146.85 |
| Morrisonville | 90 | |
| Palestine | 90 | |
| Kincaid (South Fork) | 91 | |
| Rockford (Keith Country Day) | 91 | 150.15 |
| Chicago (TEAM Englewood) | 92 | |
| Cairo | 93 | |
| Wolf Lake (Shawnee) | 93 | |
| Chicago (Waldorf) | 94 | 155.10 |
| Donovan | 94 | |
| Chicago (John Hope) | 96 | |
| Chrisman | 96 | |
| Cissna Park | 97 | |
| Hoffman Estates (Valeo Academy) | 98E | |
| Bement | 100 | |
| Griggsville (G.-Perry) | 100 | |
| Chicago (Douglass) | 101 | |
| Thompsonville | 101 | |
| Waltonville | 101 | |
| Jacksonville (Illinois School for the Deaf) | 102 | 168.30 |
| London Mills (Spoon River Valley) | 102 | |
| Orangeville | 102 | |
| Hume (Shiloh) | 103 | |
| Hutsonville | 103 | |
| Tamms (Egyptian) | 103 | |
| Cullom (Tri-Point) | 104 | |
| Table Grove (VIT) | 104 | |
| Windsor | 104 | |
| Chicago (St. Francis de Sales) | 105 | 173.25 |
| Mooseheart | 105 | 173.25 |
| Strasburg (Stewardson-S.) | 105 | |
| Washburn (Lowpoint-W.) | 105 | |
| Arlington Heights (Christian Liberty Academy) | 106 | 174.90 |
| Danville (Schlarman) | 106 | 174.90 |
| East St. Louis (SIUE Charter) | 106 | 174.90 |
| Freeport (Aquin) | 107 | 176.55 |
| Annawan | 108 | |
| Bloomington (Cornerstone Christian Academy) | 108 | 178.20 |
| Mulberry Grove | 108 | |
| Waverly | 109 | |
| Concord (Triopia) | 110 | |
| Decatur (D. Lutheran) | 110 | 181.50 |
| Warren | 110 | |
| Cowden (C.-Herrick) | 111 | |
| Elgin (E. Academy) | 112 | 184.80 |
| Hebron (Alden-H.) | 112 | |
| Martinsville | 112 | |
| Palmyra (Northwestern) | 112 | |
| Chicago (Horizon/Southwest Chicago) | 113 | 186.45 |
| Galatia | 113 | |
| Woodhull (AlWood) | 114 | |
| Astoria | 116 | |
| Chicago (Little Black Pearl Arts Academy) | 116 | 191.40 |
| Rockford (Christian Life) | 116 | 191.40 |
| Dieterich | 117 | |
| Chicago (Manley) | 118 | |
| Chicago (St. Benedict) | 118 (2) | 194.70 |
| Elkville (Elverado) | 118 | |
| Sandoval | 118 | |
| Carrier Mills (C.M.-Stonefort) | 119 | |
| St. Elmo | 119 | |
| Bluford (Webber) | 121 | |
| Greenfield | 121 | |
| Centralia (Christ Our Rock Lutheran) | 122 | 201.30 |
| Chicago (Wolcott) | 122 | 201.30 |
| DePue | 122 | |
| Cisne | 123 | |
| Mounds (Meridian) | 125 | |
| Ullin (Century) | 127 | |
| Crete (Illinois Lutheran) | 128 | 211.20 |
| Jacksonville (Routt) | 128 | 211.20 |
| Hardin (Calhoun) | 130 | |
| Champaign (Judah Christian) | 131 | 216.15 |
| Chicago (Spry Community Links) | 131 | |
| Mt. Olive | 131 | |
| Chicago (Harper) | 133 | |
| Armstrong | 134 | |
| Earlville | 134 | |
| Pearl City | 135 | |
| Chicago (Hirsch) | 136 | |
| Chicago (Morgan Park Academy) | 136 | 224.40 |
| Lexington | 136 | |
| Delavan | 137 | |
| Lombard (College Prep) | 138 | 227.70 |
| Buffalo (Tri-City) | 139 | |
| Golconda (Pope County) | 139 | |
| Cuba | 140 | |
| Ashland (A-C Central) | 141 | |
| Augusta (Southeastern) | 141 | |
| Elgin (Westminster Christian) | 141 | 232.65 |
| Cambridge | 142 | |
| Hanover (River Ridge) | 142 | |
| Lebanon | 143 | |
| Springfield (Lutheran) | 143 | 235.95 |
| Chicago (Lycée Français de Chicago) | 144 | 237.60 |
| Ramsey | 144 | |
| Barry (Western) | 146 | |
| Marion (Crab Orchard) | 146 | |
| Raymond (Lincolnwood) | 146 | |
| Valmeyer | 148 | |
| Flanagan (F.-Cornell) | 150 | |
| Streator (Woodland) | 150 | |
| Payson (Seymour) | 151 | |
| Chicago (Collegiate Charter) | 152 (1) | 250.80 |
| Wayne City | 154 | |
| Chicago (Providence St. Mel) | 155 | 255.75 |
| Cerro Gordo | 156 | |
| Mt. Pulaski | 158 | |
| Milledgeville | 160 | |
| Polo | 160 | |
| Ashton (A.-Franklin Center) | 163 | |
| Galva | 163 | |
| New Athens | 163 | |
| Woodlawn | 163 | |
| Roanoke (R.-Benson) | 164 | |
| Sciota (West Prairie) | 164 | |
| Steeleville | 164 | |
| Newark | 165 | |
| Ottawa (Marquette) | 165 | 272.25 |
| Broadlands (Heritage) | 167 | |
| Colfax (Ridgeview) | 167 | |
| Kirkland (Hiawatha) | 167 | |
| Bethany (Okaw Valley) | 169 | |
| Madison | 169 | |
| Villa Park (Islamic Foundation) | 169 X | 278.85 |
| Durand | 172 | |
| Elizabethtown (Hardin County) | 172 | |
| Bunker Hill | 173 | |
| Grant Park | 174 | |
| Deerfield (Rochelle Zell) | 175 | 288.75 |
| Evanston (Beacon Academy) | 175 | 288.75 |
| Okawville | 175 | |
| Hamilton | 176 | |
| Henry (H.-Senachwine) | 178 | |
| Winchester | 178 | |
| Zeigler (Z.-Royalton) | 178 | |
| Nokomis | 179 | |
| Chicago (Excel Academy/Woodlawn) | 180 | |
| Stockton | 180 | |
| Cobden | 181 | |
| Oneida (ROWVA) | 182 | |
| Liberty | 183 | |
| Gardner (G.-South Wilmington) | 184 | |
| Kewanee (Wethersfield) | 184 | |
| Marissa | 184 | |
| Pawnee | 185 | |
| Bridgeview (Aqsa) | 186 X | 306.90 |
| Chicago (Acero/Cruz) | 187 | 308.55 |
| Glen Carbon (Father McGivney) | 188 | 310.20 |
| Goreville | 190 | |
| Milford | 190 | |
| Schaumburg (S. Christian) | 190 | 313.50 |
| Sesser (S.-Valier) | 190 | |
| Neoga | 191 | |
| Oblong | 191 | |
| Mason City (Illini Central) | 193 | |
| Chicago (Foundations College Prep) | 194 (2) | 320.10 |
| Fisher | 195 | |
| Mt. Sterling (Brown County) | 195 | |
| Louisville (North Clay) | 196 | |
| Farina (South Central) | 197 | |
| Erie | 199 | |
| Villa Grove | 199 | |
| Warsaw | 199 | |
| Hinckley (H.-Big Rock) | 202 | |
| Lanark (Eastland) | 202 | |
| Junction (Gallatin County) | 205 | |
| Peoria Heights | 206 | |
| Bridgeview (Universal) | 207 | 341.55 |
| Elgin (Harvest Christian Academy) | 207 | 341.55 |
| Lewistown | 207 | |
| Varna (Midland) | 207 | |
| Carrollton | 208 | |
| Norris City (N.C.-Omaha-Enfield) | 208 | |
| Mendon (Unity) | 209 | |
| Edwardsville (Metro-East Lutheran) | 211 | 348.15 |
| Shabbona (Indian Creek) | 211 | |
| Waterloo (Gibault Catholic) | 213 | 351.45 |
| Chicago (Austin) | 214 | |
| St. Anne | 215 | |
| Amboy | 216 | |
| Chicago (Richards) | 217 | |
| Moweaqua (Central A & M) | 218 | |
| Christopher | 221 | |
| East Dubuque | 221 | |
| Effingham (St. Anthony) | 221 | 364.65 |
| Bushnell (B.-Prairie City) | 222 | |
| Sterling (Newman Central Catholic) | 223 | 367.95 |
| Altamont | 224 | |
| Arcola | 224 | |
| Decatur (St. Teresa) | 224 | 369.60 |
| Niantic (Sangamon Valley) | 225 | |
| Serena | 225 | |
| Farmer City (Blue Ridge) | 228 | |
| Chicago (C. Hope Academy) | 229 | 377.85 |
| Aurora (A. Christian) | 233 (V) | 384.45 |
| Elmwood | 233 | |
| Princeville | 233 | |
| Winnetka (North Shore Country Day) | 234 | 386.10 |
| Lena (L.-Winslow) | 236 | |
| Peoria (P. Christian) | 237 | 391.05 |
| White Hall (North Greene) | 238 | |
| Biggsville (West Central) | 241 | |
| Brimfield | 241 | |
| Chicago (C. Tech Academy Charter) | 241 | 397.65 |
| Chicago (Uplift) | 241 | 397.65 |
| Skokie (Ida Crown) | 241 | 397.65 |
| Urbana (University) | 241 | 397.65 |
| LeRoy | 242 | |
| Galena (H.S.) | 243 | |
| Chicago (Fenger) | 244 | |
| Prophetstown | 244 | |
| Abingdon (A.-Avon) | 245 | |
| Camp Point (Central) | 245 | |
| Heyworth | 245 | |
| Forreston | 246 | |
| Lake Forest (Woodlands Academy) | 246 (G) | 405.90 |
| Toulon (Stark County) | 247 | |
| South Beloit | 248 | |
| Chicago (Tilden) | 249 | |
| Dwight | 249 | |
| New Berlin | 249 | |
| Chicago (Excel Academy/Southwest) | 250 | 412.50 |
| Dakota | 250 | |
| Skokie (Yeshiva) | 250 (B) | 412.50 |
| Glasford (Illini Bluffs) | 253 | |
| Pecatonica | 256 | |
| Chicago (CICS/ChicagoQuest) | 258 | 425.70 |
| Chicago (Perspectives/Joslin) | 258 | 425.70 |
| Monmouth (United) | 258 | |
| Morrison | 260 | |
| Chicago (Air Force Academy) | 261 | 430.65 |
| Chicago (Collins Academy) | 261 | 430.65 |
| Macon (Meridian) | 263 | |
| Chicago (Leo) | 264 (B) | 435.60 |
| Champaign (St. Thomas More) | 267 | 440.55 |
| Casey (C.-Westfield) | 268 | |
| Catlin (Salt Fork) | 268 | |
| Chicago (Excel Academy/Roseland) | 268 | |
| Chicago (Excel Academy/Englewood) | 269 | 443.85 |
| Bridgeport (Red Hill) | 271 | |
| Somonauk | 271 | |
| Peru (St. Bede) | 272 | 448.80 |
| Chicago (Orr) | 275 | |
| Havana | 276 | |
| Peoria (Quest Charter Academy) | 276 | 455.40 |
| Dupo | 278 | |
| Toledo (Cumberland) | 278 | |
| Chicago (Horizon/McKinley) | 279 | 460.35 |
| Argenta (A.-Oreana) | 284 | |
| Chicago (Our Lady of Tepeyac) | 288 (G) | 475.20 |
| Des Plaines (Willows Academy) | 288 (G) | 475.20 |
| Granville (Putnam County) | 288 | |
| Albion (Edwards County) | 289 | |
| Fulton (H.S.) | 289 | |
| Georgetown (G.-Ridge Farm) | 289 | |
| Manito (Midwest Central) | 291 | |
| Melrose Park (Walther Christian) | 293 | 483.45 |
| Chicago (Bowen) | 294 | |
| Warrensburg (W.-Latham) | 297 | |
| Tuscola | 298 | |
| Gilman (Iroquois West) | 300 | |
| Lawrenceville | 300 | |
| Chicago (Perspectives/Leadership) | 301 | 496.65 |
| Athens | 303 | |
| Fithian (Oakwood) | 304 | |
| Chicago (Legal Prep Charter) | 306 | 504.90 |
| Chicago (Corliss) | 308 | |
| Niles (Northridge Prep) | 308 (B) | 508.20 |
| Chicago (C. Military Academy-Bronzeville) | 309 | 509.85 |
| Arthur (A.-Lovington-Atwood-Hammond) | 310 | |
| Watseka | 310 | |
| Chicago (Alcott) | 311 | |
| Gibson City (G.C.-Melvin-Sibley) | 312 | |
| Campbell Hill (Trico) | 313 | |
| Tremont | 313 | |
| Teutopolis | 316 | |
| Carlyle | 321 | |
| Elmhurst (IC Catholic) | 321 | 529.65 |
| Beecher | 323 | |
| Shelbyville | 323 | |
| Momence | 324 | |
| River Grove (Guerin) | 324 | 534.60 |
| Chicago (Dyett) | 328 | |
| Sullivan | 328 | |
| Bloomington (Central Catholic) | 329 | 542.85 |
| Chester | 329 | |
| Port Byron (Riverdale) | 329 | |
| Chicago (Gage Park) | 330 | |
| Chicago (Kelvyn Park) | 331 | |
| Carthage (Illini West) | 332 | |
| Chicago (Christ the King) | 332 | 547.80 |
| Chicago (Perspectives/Technology) | 333 | 549.45 |
| Chicago (F.W. Parker) | 334 | 551.10 |
| Westchester (St. Joseph) | 335 | 552.75 |
| Chicago (Marshall) | 336 | |
| Pittsfield | 336 | |
| Minonk (Fieldcrest) | 338 | |
| Carmi (C.-White County) | 340 | |
| Chicago (C. Math and Science Charter) | 340 | 561.00 |
| Savanna (West Carroll) | 340 | |
| Chicago (Holy Trinity) | 341 | 562.65 |
| Orion | 341 | |
| Rushville (R.-Industry) | 341 | |
| Bismarck (B.-Henning-Rossville-Alvin) | 342 | |
| Palos Heights (Chicago Christian) | 342 | 564.30 |
| Petersburg (PORTA) | 342 | |
| Johnston City | 345 | |
| Mackinaw (Deer Creek-M.) | 345 | |
| Downs (Tri-Valley) | 346 | |
| Kankakee (McNamara) | 347 | 572.55 |
| Eldorado | 348 | |
| Rockford (Lutheran) | 349 | 575.85 |
| Sparta | 349 | |
| Taylor Ridge (Rockridge) | 350 | |
| Manlius (Bureau Valley) | 351 | |
| Clifton (Central) | 354 | |
| El Paso (E.P.-Gridley) | 356 | |
| Flora | 358 | |
| Chicago (ASPIRA/Early College) | 364 | 600.60 |
| Chicago (Noble/Baker) | 365 | 602.25 |
| Elmhurst (Timothy Christian) | 365 | 602.25 |
| Hoopeston (H. Area) | 365 | |
| McLeansboro (Hamilton County) | 375 | |
| Chicago (Josephinum) | 376 (G) | 620.40 |
| Chicago (Young Women's Leadership Charter) | 376(G) | 620.40 |
| Gillespie | 376 | |
| Red Bud | 376 | |
| Trenton (Wesclin) | 377 | |
| Rockford (R. Christian) | 379 (V) | 625.35 |
| Belleville (Althoff Catholic) | 380 | 627.00 |
| Chicago (Wells) | 380 | |
| Staunton | 380 | |
| Vienna | 380 | |
| Chicago (Harlan) | 381 | |
| Chicago (Raby) | 381 | 628.65 |
| Elgin (St. Edward) | 382 | 630.30 |
| Chicago (DeVry Advantage Academy) | 386 (2) | 636.90 |
| Knoxville | 386 | |
| Westville | 387 | |
| Maroa (M.-Forsyth) | 391 | |
| Marshall | 391 | |
| Auburn | 393 | |
| Litchfield | 395 | |
| Aledo (Mercer County) | 396 | |
| Breese (Mater Dei) | 398 | 656.70 |
| Quincy (Notre Dame) | 398(V) | 656.70 |
| Nashville | 399 | |
| Pana | 399 | |
| Waukegan (Cristo Rey St. Martin) | 399 | 658.35 |
| Chicago (Perspectives/IIT Math & Science) | 403 | 664.95 |
| Riverton | 407 | |
| Chicago (UCCS/Woodlawn) | 411 | 678.15 |
| Alton (Marquette) | 412 | 679.80 |
| Chicago (CICS/Ellison) | 415 | 684.75 |
| Pleasant Plains | 420 | |
| Oregon | 422 | |
| Chicago (Urban Prep/West) | 426(B) | 702.90 |
| Fairfield | 426 | |
| Vandalia | 429 | |
| Virden (North Mac) | 429 | |
| Pinckneyville | 433 | |
| Spring Valley (Hall) | 437 | |
| Westmont | 437 | |
| Chicago (DePaul College Prep) | 439 | 724.35 |
| Chicago (Dunbar) | 439 | 724.35 |
| Rock Island (Alleman) | 440 | 726.00 |
| Farmington | 445 | |
| Beardstown | 449 | |
| Robinson | 449 | |
| Carlinville | 450 | |
| DuQuoin (H.S.) | 451 | |
| Winnebago | 454 | |
| Newton | 456 | |
| Seneca | 456 | |
| Chicago (Latin) | 459 | 757.35 |
| Chicago (Noble/Rowe-Clark) | 461 | 760.65 |
| Sherrard | 462 | |
| Wilmington | 465 | |
| Piasa (Southwestern) | 467 | |
| St. Joseph (S.J.-Ogden) | 467 | |
| Williamsville | 467 | |
| Byron | 470 | |
| Mt. Carmel | 473 | |
| Chicago (CICS/Longwood) | 475 | 783.75 |
| Braidwood (Reed-Custer) | 477 | |
| Chicago (Carver Military Academy) | 479 | 790.35 |
| Lisle (Sr.) | 480 | |
| Chicago (Crane Medical Prep) | 481 | 793.65 |
| Paxton (P.-Buckley-Loda) | 481 | |
| Chicago (ACE Amandla Charter) | 486 | 801.90 |
| Chicago (ASPIRA/Business and Finance) | 489 | 806.85 |
| Chicago (Noble/Noble Academy) | 489 | 806.85 |
| West Frankfort (Frankfort) | 491 | |
| Peotone | 493 | |
| Chicago (Disney) | 498 | 821.70 |
| Poplar Grove (North Boone) | 503 | |
| Chicago (Noble/DRW Trading) | 508 | 838.20 |
| Anna (A.-Jonesboro) | 510 | |
| Chicago (Julian) | 516 | |
| Eureka | 517 | |
| Hillsboro | 519 | |
| Chicago (Urban Prep/Englewood) | 520(B) | 858.00 |
| Greenville | 524 | |
| Chicago (Noble/Mansueto) | 525 | 866.25 |
| Herscher | 527 | |
| Monticello | 527 | |
| Princeton | 529 | |
| Monmouth (M.-Roseville) | 530 | |
| Richton Park (Southland College Prep Charter) | 531 | 876.15 |
| Chicago (Phoenix Military Academy) | 532 | 877.80 |
| Chicago (Ogden International) | 535 | 882.75 |
| Chicago (Catalyst/Maria) | 536 | 884.40 |
| Chicago (EPIC Academy Charter) | 538 | 887.70 |
| Stanford (Olympia) | 541 | |
| Chicago (C. Academy) | 542 | 894.30 |
| Chicago (Clark) | 542 | 894.30 |
| Wilmette (Regina Dominican) | 542 (G) | 894.30 |
| Harrisburg | 545 | |
| Tolono (Unity) | 546 | |
| Benton | 547 | |
| Chicago (Acero/Soto) | 551 | 909.15 |
| Chicago (DuSable) | 552 | |
| Chicago (Rickover Naval Academy) | 555 | 915.75 |
| Mendota | 555 | |
| Roxana | 559 | |
| Chicago (University) | 560 | 924.00 |
| Kewanee (H.S.) | 561 | |
| Wood River (East Alton-W.R.) | 561 | |
| Aurora (Central Catholic) | 563 | 928.95 |
| Fairbury (Prairie Central) | 563 | |
| Chicago (Cristo Rey Jesuit) | 571 | 942.15 |
| Chicago (Marine Leadership Academy) | 571 | 942.15 |
| Clinton | 581 | |
| Paris | 581 | |
| Metropolis (Massac County) | 584 | |
| Genoa (G.-Kingston) | 588 | |
| Breese (Central) | 592 | |
| Macomb | 592 | |
| Stillman Valley | 596 | |
| Murphysboro | 597 | |
| Chicago (King) | 599 | 988.35 |
| Chicago (Acero/Garcia) | 600 | 990.00 |
| Carterville | 606 | |
| Aurora (Rosary) | 610 (G) | 1006.50 |
| Chicago (High School for the Arts) | 612 | 1009.80 |
| Normal (University) | 612 | 1009.80 |
| Peoria (Manual) | 613 | |
| Chillicothe (Illinois Valley Central) | 622 | |
| Chicago (Phillips) | 623 | |
| Joliet (Catholic Academy) | 626 | 1032.90 |
| Chicago (Noble/Hansberry) | 628 | 1036.20 |
| Johnsburg | 628 | |
| Chicago (Urban Prep/Bronzeville) | 632(B) | 1042.80 |
| Chicago (Noble/Rauner) | 633 | 1044.45 |
| Freeburg | 633 | |
| Lombard (Montini) | 635 | 1047.75 |
| West Chicago (Wheaton Academy) | 642 | 1059.30 |
| Rock Falls | 645 | |
| Chicago (Noble/Butler) | 647 | 1067.55 |
| Pontiac | 647 | |
| Chicago (South Shore International College Prep) | 648 | 1069.20 |
| Springfield (Sacred Heart-Griffin) | 648 | 1069.20 |
| Chicago (Noble Street Charter) | 652 | 1075.80 |
| Woodstock (Marian) | 659 | 1087.35 |
| Chicago (Noble/Golder) | 662 | 1092.30 |
| Coal City | 662 | |
| Richmond (R.-Burton) | 663 | |
| Chicago (Intrinsic Charter) | 677 | 1117.05 |
| Manteno | 678 | |
| Burbank (St. Laurence) | 685 | 1130.25 |
| Columbia | 685 | |
| Marengo | 685 | |
| Salem | 686 | |
| Sandwich | 689 | |
| Plano | 699 | |
| Canton | 700 | |
| Chicago (North Lawndale Charter) | 701 | 1156.65 |
| Chicago (Farragut) | 713 | |
| Chicago (Agricultural Science) | 718 | 1184.70 |
| Harvard | 718 | |
| Chicago (Sullivan) | 729 | |
| Wheaton (St. Francis) | 731 | 1206.15 |
| Herrin (H.S.) | 733 | |
| Effingham (H.S.) | 736 | |
| Chicago (Instituto Health Science Charter) | 738 | 1217.70 |
| Rantoul | 738 | |
| North Chicago | 741 | |
| Dixon (H.S.) | 742 | |
| Olney (Richland County) | 742 | |
| Chicago (Clemente) | 753 | |
| LaGrange Park (Nazareth Academy) | 760 | 1254.00 |
| Taylorville | 761 | |
| Rochester | 766 | |
| Bethalto (Civic Memorial) | 768 | |
| Mt. Zion | 775 | |
| Peoria (Notre Dame) | 776 | 1280.40 |
| Chicago (Bogan) | 778 | |
| Chicago (Noble/Johnson) | 780 | 1287.00 |
| Chicago (Noble/Comer) | 781 | 1288.65 |
| Chicago (Foreman) | 798 | |
| Charleston | 803 | |
| Waterloo (H.S.) | 806 | |
| Lincoln | 819 | |
| Evergreen Park | 824 | |
| Jerseyville (Jersey) | 832 | |
| Aurora (Illinois Math and Science Academy) | 836(3) | 1379.40 |
| Arlington Heights (St. Viator) | 842(V) | 1389.30 |
| Chicago (Brooks) | 842 | 1389.30 |
| Geneseo | 843 | |
| Chicago (Hyde Park) | 850 | |
| Morris | 851 | |
| Rockford (Boylan Catholic) | 856 | 1412.40 |
| Norridge (Ridgewood) | 860 | |
| Chicago (C. Vocational) | 861 | 1420.65 |
| Streator (Twp.) | 872 | |
| Cahokia (H.S.) | 883 | |
| River Forest (Trinity) | 892 (G) | 1471.80 |
| Rochelle | 893 | |
| Chicago (Goode STEM Academy) | 903 | |
| Centralia (H.S.) | 905 | |
| Chicago (De La Salle) | 906 | 1494.90 |
| Park Forest (Rich East) | 913 | |
| Highland | 915 | |
| Chicago (CICS/Northtown) | 917 | 1513.05 |
| Mahomet (M.-Seymour) | 919 | |
| Morton | 923 | |
| Woodstock (North) | 929 | |
| Elmwood Park | 930 | |
| New Lenox (Providence Catholic) | 932 | 1537.80 |
| Chicago (Noble/UIC) | 939 | 1549.35 |
| Richton Park (Rich South) | 947 | |
| Chicago (Resurrection) | 950(G) | 1567.50 |
| Chicago (Noble/Muchin) | 956 | 1577.40 |
| Chicago (Hancock) | 967 | |
| Chicago (North Grand) | 968 | |
| Metamora | 980 | |
| East Peoria | 983 | |
| Chicago (Noble/Pritzker) | 985 | 1625.25 |
| Jacksonville (H.S.) | 986 | |
| Carbondale (H.S.) | 990 | |
| Woodstock (H.S.) | 991 | |
| Chicago Heights (Marian) | 1004 | 1656.60 |
| Bartonville (Limestone) | 1009 | |
| Mattoon | 1013 | |
| Chicago (Noble/ITW Speer) | 1014 | 1673.10 |
| Chicago (Roosevelt) | 1014 | |
| Decatur (Eisenhower) | 1023 | |
| Sterling (H.S.) | 1044 | |
| Olympia Fields (Rich Central) | 1045 | |
| Tinley Park (H.S.) | 1049 | |
| Chicago (Northside) | 1061 | 1750.65 |
| Aurora (Marmion Academy) | 1064 (B) | 1755.60 |
| Chicago (Back of the Yards) | 1064 | |
| Chicago (Payton) | 1073 | 1770.45 |
| Burlington (Central) | 1078 | |
| Mascoutah | 1078 | |
| Marion (H.S.) | 1082 | |
| Chicago (Lindblom) | 1090 | 1798.50 |
| Decatur (MacArthur) | 1093 | |
| Troy (Triad) | 1128 | |
| Chicago (Noble/Bulls) | 1136 | 1874.40 |
| Chicago (St. Rita) | 1150 (B) | 1897.50 |
| Mt. Vernon (H.S.) | 1151 | |
| Freeport (H.S.) | 1158 | |
| Glen Ellyn (Glenbard South) | 1158 | |
| Dolton (Thornridge) | 1172 | |
| Chicago (Morgan Park) | 1177 | |
| Country Club Hills (Hillcrest) | 1183 | |
| Urbana (H.S.) | 1185 | |
| Oak Park (Fenwick) | 1191 | 1965.15 |
| Chicago (Westinghouse College Prep) | 1192 | 1966.80 |
| Chicago (Solorio Academy) | 1195 | |
| Springfield (Lanphier) | 1199 | |
| Mundelein (Carmel) | 1205 | 1988.25 |
| LaSalle (L.-Peru) | 1217 | |
| Sycamore (H.S.) | 1221 | |
| Peoria (Richwoods) | 1225 | |
| Chicago (Amundsen) | 1227 | |
| Springfield (Southeast) | 1233 | |
| East St. Louis (Sr.) | 1235 | |
| Chicago (Mt. Carmel) | 1236 (B) | 2039.40 |
| Kankakee (Sr.) | 1243 | |
| Belvidere (H.S.) | 1245 | |
| Chicago (Steinmetz) | 1262 | |
| Galesburg (H.S.) | 1271 | |
| Chicago (St. Patrick) | 1276 (B) | 2105.40 |
| Champaign (Central) | 1277 | |
| Chicago (Little Village) | 1279 | |
| Oak Forest | 1290 | |
| Dunlap | 1304 | |
| Maple Park (Kaneland) | 1313 | |
| Lisle (Benet Academy) | 1318 | 2174.70 |
| Antioch | 1327 | |
| Ottawa (Twp.) | 1332 | |
| Chicago (Simeon) | 1335 | 2202.75 |
| Washington | 1340 | |
| Grayslake (Central) | 1353 | |
| Wauconda | 1355 | |
| Peoria (H.S.) | 1357 | |
| Lake Villa (Lakes) | 1359 | |
| Chicago (Brother Rice) | 1388 (B) | 2290.20 |
| Bloomington (H.S.) | 1390 | |
| Chicago (Lake View) | 1391 | |
| Chicago (Prosser) | 1395 | 2301.75 |
| Vernon Hills | 1400 | |
| Chatham (Glenwood) | 1403 | |
| Champaign (Centennial) | 1404 | |
| Lemont (H.S.) | 1404 | |
| Midlothian (Bremen) | 1405 | |
| Springfield (H.S.) | 1415 | |
| Crystal Lake (Prairie Ridge) | 1436 | |
| Chicago (Washington) | 1440 | |
| Chicago (Senn) | 1449 | |
| Chicago (Mather) | 1451 | |
| Calumet City (Thornton Fractional North) | 1452 | |
| Chicago (St. Ignatius College Prep) | 1454 | 2399.10 |
| Danville (H.S.) | 1460 | |
| Crystal Lake (South) | 1462 | |
| Bensenville (Fenton) | 1473 | |
| Grayslake (North) | 1476 | |
| Darien (Hinsdale South) | 1483 | |
| Chicago (Kenwood) | 1491 | |
| Crystal Lake (Central) | 1508 | |
| Belvidere (North) | 1515 | |
| Niles (Notre Dame) | 1540 (B) | 2541.00 |
| Rock Island (H.S.) | 1597 | |
| Lake Forest (H.S.) | 1611 | |
| Riverside (R.-Brookfield) | 1615 | |
| Deerfield (H.S.) | 1622 | |
| Oak Lawn (Richards) | 1624 | |
| Chicago (Marist) | 1628 | 2686.20 |
| Hampshire | 1636 | |
| Crete (C.-Monee) | 1638 | |
| East Moline (United) | 1665 | |
| Normal (Community West) | 1673 | |
| Rockford (Jefferson) | 1680 | |
| Chicago (Kennedy) | 1688 | |
| Cary (C.-Grove) | 1705 | |
| Wheeling | 1717 | |
| Chicago (Von Steuben) | 1726 | 2847.90 |
| South Holland (Thornwood) | 1730 | |
| Harvey (Thornton) | 1738 | |
| Chicago (Juarez) | 1743 | |
| Palos Heights (Shepard) | 1744 | |
| Rockford (Guilford) | 1744 | |
| Chicago (Schurz) | 1751 | |
| Quincy (Sr.) | 1753 | |
| Chicago (Hubbard) | 1778 | |
| Yorkville (H.S.) | 1781 | |
| Burbank (Reavis) | 1792 | |
| Fox Lake (Grant) | 1795 | |
| Rockford (Auburn) | 1805 | |
| Granite City | 1806 | |
| Blue Island (Eisenhower) | 1812 | |
| Oak Lawn (Community) | 1823 | |
| Pekin | 1824 | |
| Chicago (Mother McAuley) | 1828 (G) | 3016.20 |
| Park Ridge (Maine East) | 1830 | |
| DeKalb | 1840 | |
| Chicago (Jones) | 1861 | 3070.65 |
| Arlington Heights (Hersey) | 1864 | |
| Rockford (East) | 1864 | |
| Lake Zurich | 1865 | |
| Lansing (Thornton Fractional South) | 1880 | |
| Chicago (Kelly) | 1881 | |
| Collinsville | 1885 | |
| Batavia | 1899 | |
| Rolling Meadows | 1899 | |
| New Lenox (Lincoln-Way West) | 1905 | |
| Hoffman Estates (H.S.) | 1907 | |
| Summit (Argo) | 1909 | |
| Villa Park (Willowbrook) | 1912 | |
| Chicago (Whitney Young) | 1914 | 3158.10 |
| Libertyville | 1917 | |
| Romeoville (H.S.) | 1920 | |
| Geneva | 1921 | |
| Elk Grove Village (E.G.) | 1935 | |
| Streamwood | 1955 | |
| Addison (A. Trail) | 1959 | |
| Mundelein (H.S.) | 1978 | |
| Wheaton (W. Warrenville South) | 1982 | |
| Northbrook (Glenbrook North) | 1988 | |
| Highland Park | 1994 | |
| Buffalo Grove | 2004 | |
| Rockton (Hononegah) | 2006 | |
| Alton (Sr.) | 2007 | |
| Wilmette (Loyola Academy) | 2009 | 3314.85 |
| Maywood (Proviso East) | 2016 | |
| St. Charles (North) | 2022 | |
| Bradley (B.-Bourbonnais) | 2032 | |
| West Chicago (H.S.) | 2051 | |
| Des Plaines (Maine West) | 2059 | |
| Skokie (Niles North) | 2059 | |
| Belleville (West) | 2066 | |
| Plainfield (Central) | 2066 | |
| Elgin (Larkin) | 2079 | |
| Moline (H.S.) | 2082 | |
| Machesney Park (Harlem) | 2086 | |
| Normal (Community) | 2091 | |
| Wheaton (North) | 2096 | |
| Chicago (Lincoln Park) | 2113 | |
| Schaumburg (H.S.) | 2116 | |
| New Lenox (Lincoln-Way Central) | 2137 | |
| Tinley Park (Andrew) | 2141 | |
| Mt. Prospect (Prospect) | 2150 | |
| Round Lake | 2157 | |
| Algonquin (Jacobs) | 2169 | |
| Downers Grove (North) | 2185 | |
| McHenry | 2192 | |
| Hillside (Proviso West) | 2193 | |
| Carol Stream (Glenbard North) | 2203 | |
| Plainfield (East) | 2250 | |
| Palos Hills (Stagg) | 2257 | |
| Lombard (Glenbard East) | 2263 | |
| Plainfield (North) | 2321 | |
| Hoffman Estates (Conant) | 2349 | |
| Edwardsville (H.S.) | 2366 | |
| Glen Ellyn (Glenbard West) | 2373 | |
| Park Ridge (Maine South) | 2396 | |
| O'Fallon (H.S.) | 2409 | |
| Bartlett | 2422 | |
| Skokie (Niles West) | 2435 | |
| Carpentersville (Dundee-Crown) | 2458 | |
| Belleville (East) | 2474 | |
| St. Charles (East) | 2512 | |
| Plainfield (South) | 2521 | |
| Zion (Z.-Benton) | 2576 | |
| Elgin (H.S.) | 2582 | |
| Palatine (H.S.) | 2586 | |
| Roselle (Lake Park) | 2586 | |
| Palatine (Fremd) | 2594 | |
| Oswego (East) | 2616 | |
| Aurora (Waubonsie Valley) | 2642 | |
| South Elgin | 2673 | |
| Naperville (North) | 2674 | |
| Downers Grove (South) | 2696 | |
| Minooka | 2724 | |
| Flossmoor (Homewood-F.) | 2757 | |
| Oswego (H.S.) | 2773 | |
| Hinsdale (Central) | 2786 | |
| Elmhurst (York) | 2805 | |
| Naperville (Central) | 2810 | |
| Orland Park (Sandburg) | 2865 | |
| Aurora (Metea Valley) | 2887 | |
| Frankfort (Lincoln-Way East) | 2889 | |
| Chicago (Curie) | 2918 | 4814.70 |
| Chicago Heights (Bloom Twp.) | 2947 | |
| Barrington | 2953 | |
| Huntley | 3045 | |
| Glenview (Glenbrook South) | 3067 | |
| Chicago (Taft) | 3099 | |
| Joliet (Central) | 3233 | |
| Joliet (West) | 3310 | |
| Oak Park (O.P.-River Forest) | 3370 | |
| Franklin Park-Northlake (Leyden) | 3399 | |
| Evanston (Twp.) | 3459 | |
| Bolingbrook | 3550 | |
| Naperville (Neuqua Valley) | 3662 | |
| Aurora (West Aurora) | 3665 | |
| Lockport (Twp.) | 3706 | |
| Aurora (East) | 3904 | |
| Winnetka (New Trier) | 3925 | |
| LaGrange (Lyons) | 4000 | |
| Gurnee (Warren) | 4026 | |
| Chicago (Lane) | 4181 | 6898.65 |
| Lincolnshire (Stevenson) | 4185 | |
| Waukegan (H.S.) | 4609 | |
| Berwyn-Cicero (Morton) | 8206 |
These codes indicate adjustments made to the school's actual enrollment to compute its official enrollment.
| Levelers | |
| B | Boys-only school; figure shown is the enrollment multiplied by 2. |
| G | Girls-only school; figure shown is the enrollment multiplied by 2. |
| 3 | School had students in only three grades last year; figure shown is the enrollment multiplied by 1 1/3. |
| 2 | School had students in only two grades last year; figure shown is the enrollment multiplied by 2. |
| 1 | School had students in only one grade last year; figure shown is the enrollment multiplied by 4. |
| V | A variance has been subtracted. |
| + | A variance has been added. |
| Status of Enrollment Figure | |
| E | Enrollment estimated because of school opening or closing; will eventually use data from Sept. 30, 2017. |
| X | Enrollment has not been received; this is last year's total. |
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