Top 100 lowest student–teacher ratio in Illinois (2025)
Schools with the fewest students per FTE teacher, among schools with at least 100 students. Ordered by the measure shown, with the Success Index (US) for context; 100 schools shown.
- 129Alcott College PrepChicago · Public HighStudents per teacher: 4.4
- 233Ogden Int High SchoolChicago · Public HighStudents per teacher: 5.0
- 314Raby High SchoolChicago · Public HighStudents per teacher: 5.3
- 425Elizabeth Graham Elem SchoolSpringfield · Public ElementaryStudents per teacher: 6.0
- 545Mt Carmel Junior High SchoolMount Carmel · Public MiddleStudents per teacher: 6.0
- 692Butler Junior High SchoolOak Brook · Public MiddleStudents per teacher: 6.3
- 715Bronzeville Scholastic HSChicago · Public HighStudents per teacher: 6.3
- 826Frazier Perspectives Magnet ESChicago · Public ElementaryStudents per teacher: 6.5
- 960Blair Early Childhood CenterChicago · Public ElementaryStudents per teacher: 6.6
- 1079Cumberland Elem SchoolDes Plaines · Public ElementaryStudents per teacher: 6.8
- 1154Roy De Shane Elementary SchoolCarol Stream · Public ElementaryStudents per teacher: 6.9
- 1267Terrace Elem SchoolDes Plaines · Public ElementaryStudents per teacher: 7.1
- 1322Finkl Elem SchoolChicago · Public ElementaryStudents per teacher: 7.3
- 1429Cisne High SchoolCisne · Public HighStudents per teacher: 7.4
- 1543Elsie C Johnson Elem SchHanover Park · Public ElementaryStudents per teacher: 7.4
- 1635Rhodes Elem SchoolRiver Grove · Public ElementaryStudents per teacher: 7.4
- 1729Earl H Hanson Elem SchoolRock Island · Public ElementaryStudents per teacher: 7.4
- 1831Colemon J Elem AcademyChicago · Public ElementaryStudents per teacher: 7.5
- 1932Bartonville Elem SchoolBartonville · Public ElementaryStudents per teacher: 7.6
- 2027Bushnell-Prairie City High SchBushnell · Public HighStudents per teacher: 7.6
- 2116Air Force Acad High SchoolChicago · Public HighStudents per teacher: 7.7
- 2251Greenfield High SchoolGreenfield · Public HighStudents per teacher: 7.7
- 2342Reskin Elem SchoolGlendale Hts · Public ElementaryStudents per teacher: 7.7
- 2428Zeigler-Royalton High SchoolMulkeytown · Public HighStudents per teacher: 7.7
- 2545Blue Ridge High SchoolFarmer City · Public HighStudents per teacher: 7.8
- 2632Saunemin Elem SchoolSaunemin · Public ElementaryStudents per teacher: 7.8
- 2791Avoca West Elem SchoolGlenview · Public ElementaryStudents per teacher: 7.8
- 2815Schmid Elem SchoolChicago · Public ElementaryStudents per teacher: 7.8
- 2924Sherwood Elem SchoolChicago · Public ElementaryStudents per teacher: 7.8
- 3033Lindop Elem SchoolBroadview · Public ElementaryStudents per teacher: 7.9
- 3164Anne Fox Elem SchoolHanover Park · Public ElementaryStudents per teacher: 7.9
- 3235Beard Elem SchoolChicago · Public ElementaryStudents per teacher: 8.0
- 3326Davis M Magnet Elem SchoolChicago · Public ElementaryStudents per teacher: 8.0
- 3417East St Louis-Lincoln Middle SchEast Saint Louis · Public MiddleStudents per teacher: 8.0
- 3524Rupley Elem SchoolElk Grove Village · Public ElementaryStudents per teacher: 8.0
- 3652R O W V A Jr and Sr High SchoolOneida · Public HighStudents per teacher: 8.0
- 3717W W Walker Elem SchoolBedford Park · Public ElementaryStudents per teacher: 8.1
- 3834Armstrong High SchoolArmstrong · Public HighStudents per teacher: 8.1
- 3943Orchard Place Elem SchoolDes Plaines · Public ElementaryStudents per teacher: 8.1
- 4025Laraway SchoolJoliet · Public ElementaryStudents per teacher: 8.2
- 4158Rosemont Elem SchoolRosemont · Public ElementaryStudents per teacher: 8.2
- 4235New Boston Elem SchoolNew Boston · Public ElementaryStudents per teacher: 8.3
- 4343Milford High School CampusMilford · Public HighStudents per teacher: 8.3
- 4421Courtenay Elem Language Arts CtrChicago · Public ElementaryStudents per teacher: 8.3
- 4558Stratford Middle SchoolBloomingdale · Public MiddleStudents per teacher: 8.3
- 4646Dr ML King Jr Literary&Fine ArtsEvanston · Public ElementaryStudents per teacher: 8.3
- 4738Geff Elem SchoolGeff · Public ElementaryStudents per teacher: 8.3
- 4864Hawthorn Elem School NorthVernon Hills · Public ElementaryStudents per teacher: 8.3
- 4938Signal Hill Elem SchoolBelleville · Public ElementaryStudents per teacher: 8.3
- 5090Sunset Ridge Elem SchoolNorthfield · Public MiddleStudents per teacher: 8.3
- 5119Hammond Elem SchoolChicago · Public ElementaryStudents per teacher: 8.4
- 5223Walsh Elem SchoolChicago · Public ElementaryStudents per teacher: 8.4
- 5319Yates Elem SchoolChicago · Public ElementaryStudents per teacher: 8.4
- 5416Collins Academy STEAM High SchoolChicago · Public HighStudents per teacher: 8.4
- 5571Wm F Gurrie Middle SchoolLa Grange · Public MiddleStudents per teacher: 8.4
- 5613Madison Senior High SchoolMadison · Public HighStudents per teacher: 8.4
- 5734Laketown Elem SchoolSpringfield · Public ElementaryStudents per teacher: 8.4
- 5872Hawthorne Elem SchoolWheaton · Public ElementaryStudents per teacher: 8.4
- 5952River Ridge High SchoolHanover · Public HighStudents per teacher: 8.5
- 6018Christopher Elem SchoolChicago · Public ElementaryStudents per teacher: 8.5
- 6170Diamond Lake SchoolMundelein · Public ElementaryStudents per teacher: 8.5
- 6234Elverado High SchoolElkville · Public HighStudents per teacher: 8.5
- 6382Northbrook Junior High SchoolNorthbrook · Public MiddleStudents per teacher: 8.5
- 6439A-C Central Elementary SchoolChandlerville · Public ElementaryStudents per teacher: 8.6
- 6532Illini Central High SchoolMason City · Public HighStudents per teacher: 8.6
- 6635Henry-Senachwine High SchoolHenry · Public HighStudents per teacher: 8.6
- 6728McCutcheon Elem SchoolChicago · Public ElementaryStudents per teacher: 8.6
- 6823Morton Elem Career AcademyChicago · Public ElementaryStudents per teacher: 8.6
- 6950Disney II Magnet HSChicago · Public HighStudents per teacher: 8.6
- 7051East Dubuque High SchoolEast Dubuque · Public HighStudents per teacher: 8.6
- 7131Juliette Low Elem SchoolArlington Heights · Public ElementaryStudents per teacher: 8.6
- 7239Lotus SchoolSpring Grove · Public ElementaryStudents per teacher: 8.6
- 7345Gardner-South Wilmington Twp H SGardner · Public HighStudents per teacher: 8.6
- 7489Deer Path Middle Sch WestLake Forest · Public MiddleStudents per teacher: 8.6
- 7533Odell Grade SchoolOdell · Public ElementaryStudents per teacher: 8.6
- 7634Bureau Valley NorthWalnut · Public ElementaryStudents per teacher: 8.7
- 7763Washington Elem SchoolRushville · Public ElementaryStudents per teacher: 8.7
- 7819Walsh Elem SchoolSummit · Public ElementaryStudents per teacher: 8.7
- 7928Thomas Jefferson Elem SchoolJoliet · Public ElementaryStudents per teacher: 8.7
- 8053Hunt Club ElemOswego · Public ElementaryStudents per teacher: 8.7
- 8189Thomas Metcalf SchoolNormal · Public ElementaryStudents per teacher: 8.8
- 8233Flanagan-Cornell High SchoolFlanagan · Public HighStudents per teacher: 8.8
- 8334Lane Elem SchoolAlsip · Public ElementaryStudents per teacher: 8.8
- 8422Dr Donald Wharton Elem SchoolSummit · Public ElementaryStudents per teacher: 8.8
- 8538Heritage Middle SchoolBerwyn · Public MiddleStudents per teacher: 8.8
- 8632Stevenson Elem SchoolBloomington · Public ElementaryStudents per teacher: 8.8
- 8753Algonquin Middle SchoolAlgonquin · Public MiddleStudents per teacher: 8.8
- 8819Fairmont SchoolLockport · Public ElementaryStudents per teacher: 8.8
- 8933Costello SchoolLyons · Public ElementaryStudents per teacher: 8.8
- 9092Brook Forest Elem SchoolOak Brook · Public ElementaryStudents per teacher: 8.9
- 9114Chalmers STEAM ElementaryChicago · Public ElementaryStudents per teacher: 8.9
- 9215Faraday Elem SchoolChicago · Public ElementaryStudents per teacher: 8.9
- 9322Hearst Elem SchoolChicago · Public ElementaryStudents per teacher: 8.9
- 9428Forest Park Middle SchoolForest Park · Public MiddleStudents per teacher: 8.9
- 9531Grass Lake Elem SchoolAntioch · Public ElementaryStudents per teacher: 8.9
- 9633Greenview Jr/Sr High SchoolGreenview · Public HighStudents per teacher: 8.9
- 9790The Joseph Sears SchoolKenilworth · Public ElementaryStudents per teacher: 8.9
- 9834Ideal Elem SchoolCountryside · Public ElementaryStudents per teacher: 8.9
- 9966Rondout Elem SchoolLake Forest · Public ElementaryStudents per teacher: 8.9
- 10036John R Tibbott Elem SchoolBolingbrook · Public ElementaryStudents per teacher: 8.9
| # | School | Sector | Students per teacher | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|---|
| 1 | Alcott College Prep Chicago · High · Grades 9–12 | Public | 4.4 | 28.9 Lower 50% | 22% Math proficiency | 373 |
| 2 | Ogden Int High School Chicago · High · Grades 9–12 | Public | 5.0 | 33.0 Lower 50% | 22% Math proficiency | 519 |
| 3 | Raby High School Chicago · High · Grades 9–12 | Public | 5.3 | 13.6 Lower 50% | 2.5% Math proficiency | 128 |
| 4 | Elizabeth Graham Elem School Springfield · Elementary · Grades K–5 | Public | 6.0 | 25.1 Lower 50% | 17% Math proficiency | 241 |
| 5 | Mt Carmel Junior High School Mount Carmel · Middle · Grades 7–8 | Public | 6.0 | 45.4 Lower 50% | 17% Math proficiency | 199 |
| 6 | Butler Junior High School Oak Brook · Middle · Grades 6–8 | Public | 6.3 | 91.8 Top 5% | 78% Math proficiency | 163 |
| 7 | Bronzeville Scholastic HS Chicago · High · Grades 9–12 | Public | 6.3 | 14.7 Lower 50% | 5% Math proficiency | 119 |
| 8 | Frazier Perspectives Magnet ES Chicago · Elementary · Grades K–8 | Public | 6.5 | 26.1 Lower 50% | 17% Math proficiency | 129 |
| 9 | Blair Early Childhood Center Chicago · Elementary · Grades PK–1 | Public | 6.6 | 60.1 Top 50% | 59.8% Free/reduced-price lunch | 164 |
| 10 | Cumberland Elem School Des Plaines · Elementary · Grades K–5 | Public | 6.8 | 79.1 Top 25% | 62% Math proficiency | 279 |
| 11 | Roy De Shane Elementary School Carol Stream · Elementary · Grades K–5 | Public | 6.9 | 53.8 Top 50% | 42% Math proficiency | 185 |
| 12 | Terrace Elem School Des Plaines · Elementary · Grades K–5 | Public | 7.1 | 67.3 Top 50% | 52% Math proficiency | 206 |
| 13 | Finkl Elem School Chicago · Elementary · Grades PK–8 | Public | 7.3 | 21.6 Lower 50% | 17% Math proficiency | 240 |
| 14 | Cisne High School Cisne · High · Grades 9–12 | Public | 7.4 | 28.7 Lower 50% | 5% Math proficiency | 104 |
| 15 | Elsie C Johnson Elem Sch Hanover Park · Elementary · Grades K–5 | Public | 7.4 | 43.3 Lower 50% | 27% Math proficiency | 253 |
| 16 | Rhodes Elem School River Grove · Elementary · Grades PK–8 | Public | 7.4 | 34.9 Lower 50% | 19% Math proficiency | 499 |
| 17 | Earl H Hanson Elem School Rock Island · Elementary · Grades PK–6 | Public | 7.4 | 29.2 Lower 50% | 31% Math proficiency | 201 |
| 18 | Colemon J Elem Academy Chicago · Elementary · Grades PK–8 | Public | 7.5 | 31.1 Lower 50% | 22% Math proficiency | 166 |
| 19 | Bartonville Elem School Bartonville · Elementary · Grades PK–8 | Public | 7.6 | 32.1 Lower 50% | 17% Math proficiency | 204 |
| 20 | Bushnell-Prairie City High Sch Bushnell · High · Grades 9–12 | Public | 7.6 | 27.1 Lower 50% | 15% Math proficiency | 175 |
| 21 | Air Force Acad High School Chicago · High · Grades 9–12 | Public | 7.7 | 15.5 Lower 50% | 5% Math proficiency | 131 |
| 22 | Greenfield High School Greenfield · High · Grades 9–12 | Public | 7.7 | 51.4 Top 50% | 30% Math proficiency | 108 |
| 23 | Reskin Elem School Glendale Hts · Elementary · Grades K–5 | Public | 7.7 | 42.1 Lower 50% | 40% Math proficiency | 294 |
| 24 | Zeigler-Royalton High School Mulkeytown · High · Grades 9–12 | Public | 7.7 | 27.6 Lower 50% | 15% Math proficiency | 131 |
| 25 | Blue Ridge High School Farmer City · High · Grades 9–12 | Public | 7.8 | 44.5 Lower 50% | 24.5% Math proficiency | 155 |
| 26 | Saunemin Elem School Saunemin · Elementary · Grades PK–8 | Public | 7.8 | 32.1 Lower 50% | 32% Math proficiency | 102 |
| 27 | Avoca West Elem School Glenview · Elementary · Grades K–5 | Public | 7.8 | 90.7 Top 5% | 71% Math proficiency | 313 |
| 28 | Schmid Elem School Chicago · Elementary · Grades PK–8 | Public | 7.8 | 14.7 Lower 50% | 2.5% Math proficiency | 195 |
| 29 | Sherwood Elem School Chicago · Elementary · Grades PK–8 | Public | 7.8 | 24.2 Lower 50% | 22% Math proficiency | 204 |
| 30 | Lindop Elem School Broadview · Elementary · Grades PK–8 | Public | 7.9 | 33.0 Lower 50% | 20% Math proficiency | 307 |
| 31 | Anne Fox Elem School Hanover Park · Elementary · Grades K–6 | Public | 7.9 | 64.2 Top 50% | 47% Math proficiency | 324 |
| 32 | Beard Elem School Chicago · Elementary · Grades PK–3 | Public | 8.0 | 34.7 Lower 50% | 10% Math proficiency | 327 |
| 33 | Davis M Magnet Elem School Chicago · Elementary · Grades PK–8 | Public | 8.0 | 26.3 Lower 50% | 27% Math proficiency | 120 |
| 34 | East St Louis-Lincoln Middle Sch East Saint Louis · Middle · Grades 5–8 | Public | 8.0 | 17.1 Lower 50% | 3% Math proficiency | 359 |
| 35 | Rupley Elem School Elk Grove Village · Elementary · Grades K–5 | Public | 8.0 | 24.2 Lower 50% | 10% Math proficiency | 280 |
| 36 | R O W V A Jr and Sr High School Oneida · High · Grades 7–12 | Public | 8.0 | 51.7 Top 50% | 27% Math proficiency | 248 |
| 37 | W W Walker Elem School Bedford Park · Elementary · Grades K–5 | Public | 8.1 | 16.9 Lower 50% | 22% Math proficiency | 130 |
| 38 | Armstrong High School Armstrong · High · Grades 9–12 | Public | 8.1 | 34.2 Lower 50% | 15% Math proficiency | 114 |
| 39 | Orchard Place Elem School Des Plaines · Elementary · Grades K–5 | Public | 8.1 | 42.9 Lower 50% | 32% Math proficiency | 258 |
| 40 | Laraway School Joliet · Elementary · Grades PK–8 | Public | 8.2 | 25.2 Lower 50% | 15% Math proficiency | 433 |
| 41 | Rosemont Elem School Rosemont · Elementary · Grades PK–8 | Public | 8.2 | 58.1 Top 50% | 47% Math proficiency | 221 |
| 42 | New Boston Elem School New Boston · Elementary · Grades K–5 | Public | 8.3 | 34.5 Lower 50% | 24.5% Math proficiency | 165 |
| 43 | Milford High School Campus Milford · High · Grades 9–12 | Public | 8.3 | 43.2 Lower 50% | 34.5% Math proficiency | 149 |
| 44 | Courtenay Elem Language Arts Ctr Chicago · Elementary · Grades PK–8 | Public | 8.3 | 20.5 Lower 50% | 13% Math proficiency | 266 |
| 45 | Stratford Middle School Bloomingdale · Middle · Grades 6–8 | Public | 8.3 | 57.9 Top 50% | 41% Math proficiency | 520 |
| 46 | Dr ML King Jr Literary&Fine Arts Evanston · Elementary · Grades K–8 | Public | 8.3 | 45.6 Lower 50% | 34% Math proficiency | 421 |
| 47 | Geff Elem School Geff · Elementary · Grades K–8 | Public | 8.3 | 38.0 Lower 50% | 22% Math proficiency | 100 |
| 48 | Hawthorn Elem School North Vernon Hills · Elementary · Grades 1–5 | Public | 8.3 | 64.4 Top 50% | 48% Math proficiency | 347 |
| 49 | Signal Hill Elem School Belleville · Elementary · Grades PK–8 | Public | 8.3 | 38.0 Lower 50% | 22% Math proficiency | 291 |
| 50 | Sunset Ridge Elem School Northfield · Middle · Grades 4–8 | Public | 8.3 | 89.6 Top 5% | 71% Math proficiency | 274 |
| 51 | Hammond Elem School Chicago · Elementary · Grades PK–8 | Public | 8.4 | 18.8 Lower 50% | 9% Math proficiency | 259 |
| 52 | Walsh Elem School Chicago · Elementary · Grades PK–8 | Public | 8.4 | 22.6 Lower 50% | 12% Math proficiency | 245 |
| 53 | Yates Elem School Chicago · Elementary · Grades PK–8 | Public | 8.4 | 18.9 Lower 50% | 2% Math proficiency | 268 |
| 54 | Collins Academy STEAM High School Chicago · High · Grades 9–12 | Public | 8.4 | 15.6 Lower 50% | 5% Math proficiency | 228 |
| 55 | Wm F Gurrie Middle School La Grange · Middle · Grades 7–8 | Public | 8.4 | 70.5 Top 25% | 45% Math proficiency | 278 |
| 56 | Madison Senior High School Madison · High · Grades 9–12 | Public | 8.4 | 13.3 Lower 50% | 5% Math proficiency | 152 |
| 57 | Laketown Elem School Springfield · Elementary · Grades K–5 | Public | 8.4 | 34.4 Lower 50% | 32% Math proficiency | 135 |
| 58 | Hawthorne Elem School Wheaton · Elementary · Grades K–5 | Public | 8.4 | 72.3 Top 25% | 57% Math proficiency | 185 |
| 59 | River Ridge High School Hanover · High · Grades 9–12 | Public | 8.5 | 51.6 Top 50% | 44.5% Math proficiency | 128 |
| 60 | Christopher Elem School Chicago · Elementary · Grades K–8 | Public | 8.5 | 18.4 Lower 50% | 9% Math proficiency | 315 |
| 61 | Diamond Lake School Mundelein · Elementary · Grades PK–2 | Public | 8.5 | 69.6 Top 25% | 54.2% Free/reduced-price lunch | 262 |
| 62 | Elverado High School Elkville · High · Grades 9–12 | Public | 8.5 | 33.5 Lower 50% | 30% Math proficiency | 102 |
| 63 | Northbrook Junior High School Northbrook · Middle · Grades 6–8 | Public | 8.5 | 82.3 Top 10% | 61% Math proficiency | 621 |
| 64 | A-C Central Elementary School Chandlerville · Elementary · Grades PK–4 | Public | 8.6 | 39.1 Lower 50% | 24.5% Math proficiency | 129 |
| 65 | Illini Central High School Mason City · High · Grades 9–12 | Public | 8.6 | 32.3 Lower 50% | 5% Math proficiency | 172 |
| 66 | Henry-Senachwine High School Henry · High · Grades 9–12 | Public | 8.6 | 35.1 Lower 50% | 24.5% Math proficiency | 147 |
| 67 | McCutcheon Elem School Chicago · Elementary · Grades PK–8 | Public | 8.6 | 27.5 Lower 50% | 22% Math proficiency | 326 |
| 68 | Morton Elem Career Academy Chicago · Elementary · Grades PK–8 | Public | 8.6 | 23.0 Lower 50% | 7.5% Math proficiency | 268 |
| 69 | Disney II Magnet HS Chicago · High · Grades 7–12 | Public | 8.6 | 49.6 Top 50% | 31% Math proficiency | 738 |
| 70 | East Dubuque High School East Dubuque · High · Grades 9–12 | Public | 8.6 | 50.7 Top 50% | 34.5% Math proficiency | 180 |
| 71 | Juliette Low Elem School Arlington Heights · Elementary · Grades K–5 | Public | 8.6 | 31.0 Lower 50% | 17% Math proficiency | 274 |
| 72 | Lotus School Spring Grove · Elementary · Grades PK–4 | Public | 8.6 | 39.2 Lower 50% | 27% Math proficiency | 345 |
| 73 | Gardner-South Wilmington Twp H S Gardner · High · Grades 9–12 | Public | 8.6 | 44.8 Lower 50% | 24.5% Math proficiency | 154 |
| 74 | Deer Path Middle Sch West Lake Forest · Middle · Grades 7–8 | Public | 8.6 | 89.0 Top 5% | 67% Math proficiency | 361 |
| 75 | Odell Grade School Odell · Elementary · Grades PK–8 | Public | 8.6 | 32.6 Lower 50% | 17% Math proficiency | 155 |
| 76 | Bureau Valley North Walnut · Elementary · Grades PK–5 | Public | 8.7 | 33.9 Lower 50% | 22% Math proficiency | 183 |
| 77 | Washington Elem School Rushville · Elementary · Grades PK–1 | Public | 8.7 | 62.7 Top 50% | 51.3% Free/reduced-price lunch | 113 |
| 78 | Walsh Elem School Summit · Elementary · Grades K–5 | Public | 8.7 | 19.1 Lower 50% | 22% Math proficiency | 182 |
| 79 | Thomas Jefferson Elem School Joliet · Elementary · Grades K–5 | Public | 8.7 | 27.7 Lower 50% | 27% Math proficiency | 235 |
| 80 | Hunt Club Elem Oswego · Elementary · Grades K–5 | Public | 8.7 | 52.5 Top 50% | 38% Math proficiency | 357 |
| 81 | Thomas Metcalf School Normal · Elementary · Grades PK–8 | Public | 8.8 | 88.9 Top 5% | 67% Math proficiency | 459 |
| 82 | Flanagan-Cornell High School Flanagan · High · Grades 9–12 | Public | 8.8 | 33.0 Lower 50% | 5% Math proficiency | 106 |
| 83 | Lane Elem School Alsip · Elementary · Grades K–6 | Public | 8.8 | 33.5 Lower 50% | 17% Math proficiency | 228 |
| 84 | Dr Donald Wharton Elem School Summit · Elementary · Grades K–5 | Public | 8.8 | 21.7 Lower 50% | 22% Math proficiency | 114 |
| 85 | Heritage Middle School Berwyn · Middle · Grades 6–8 | Public | 8.8 | 37.7 Lower 50% | 27% Math proficiency | 447 |
| 86 | Stevenson Elem School Bloomington · Elementary · Grades K–5 | Public | 8.8 | 31.5 Lower 50% | 17% Math proficiency | 299 |
| 87 | Algonquin Middle School Algonquin · Middle · Grades 6–8 | Public | 8.8 | 52.6 Top 50% | 38% Math proficiency | 370 |
| 88 | Fairmont School Lockport · Elementary · Grades PK–8 | Public | 8.8 | 18.9 Lower 50% | 7% Math proficiency | 300 |
| 89 | Costello School Lyons · Elementary · Grades PK–5 | Public | 8.8 | 33.3 Lower 50% | 22% Math proficiency | 228 |
| 90 | Brook Forest Elem School Oak Brook · Elementary · Grades K–5 | Public | 8.9 | 92.0 Top 5% | 77% Math proficiency | 293 |
| 91 | Chalmers STEAM Elementary Chicago · Elementary · Grades PK–8 | Public | 8.9 | 14.4 Lower 50% | 2.5% Math proficiency | 205 |
| 92 | Faraday Elem School Chicago · Elementary · Grades PK–8 | Public | 8.9 | 15.0 Lower 50% | 12% Math proficiency | 178 |
| 93 | Hearst Elem School Chicago · Elementary · Grades PK–8 | Public | 8.9 | 21.9 Lower 50% | 13% Math proficiency | 285 |
| 94 | Forest Park Middle School Forest Park · Middle · Grades 6–8 | Public | 8.9 | 28.2 Lower 50% | 12% Math proficiency | 186 |
| 95 | Grass Lake Elem School Antioch · Elementary · Grades PK–8 | Public | 8.9 | 30.9 Lower 50% | 27% Math proficiency | 186 |
| 96 | Greenview Jr/Sr High School Greenview · High · Grades 6–12 | Public | 8.9 | 33.0 Lower 50% | 15% Math proficiency | 107 |
| 97 | The Joseph Sears School Kenilworth · Elementary · Grades PK–8 | Public | 8.9 | 89.5 Top 5% | 74% Math proficiency | 471 |
| 98 | Ideal Elem School Countryside · Elementary · Grades K–6 | Public | 8.9 | 34.1 Lower 50% | 27% Math proficiency | 258 |
| 99 | Rondout Elem School Lake Forest · Elementary · Grades K–8 | Public | 8.9 | 66.3 Top 50% | 47% Math proficiency | 151 |
| 100 | John R Tibbott Elem School Bolingbrook · Elementary · Grades PK–5 | Public | 8.9 | 36.2 Lower 50% | 34% Math proficiency | 330 |
Alcott College Prep in Chicago leads the 2025 list of lowest student–teacher ratio in Illinois with Students per teacher 4.4. Of the 100 schools shown, 100 are public.
Use the rankings to build a shortlist, then visit the schools and ask how they support students at your child's level.
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Frequently asked questions
What is the best ratio school in Illinois?
Alcott College Prep in Chicago ranks first among lowest student–teacher ratio in Illinois with Students per teacher 4.4 (Enrollment: 373).
How are lowest student–teacher ratio in Illinois ranked?
Schools with the fewest students per FTE teacher, among schools with at least 100 students. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.