Winnebago County schools ranked by test score
Latest IAR + ISA year (2024-25). 55 schools in Winnebago County, Illinois with reported Science scores. Illinois state average: 40.3%.
| Rank | School | Level | Science | vs state |
|---|---|---|---|---|
| 1 | Thurgood Marshall School Rockford · Rockford SD 205 | Middle | 96.8% | +56.5pp |
| 2 | Whitman Post Elem School Rockton · Rockton SD 140 | Elementary | 64.5% | +24.2pp |
| 3 | Roscoe Middle School Roscoe · Kinnikinnick CCSD 131 | Middle | 64.0% | +23.7pp |
| 4 | Shirland C C School Shirland · Shirland CCSD 134 | Elementary | 63.6% | +23.3pp |
| 5 | Stephen Mack Middle School Rockton · Rockton SD 140 | Middle | 59.7% | +19.4pp |
| 6 | Willowbrook Middle School South Beloit · Prairie Hill CCSD 133 | Middle | 59.2% | +18.9pp |
| 7 | Kinnikinnick School Roscoe · Kinnikinnick CCSD 131 | Elementary | 55.9% | +15.6pp |
| 8 | Haskell Elementary School Rockford · Rockford SD 205 | Elementary | 52.3% | +12.0pp |
| 9 | Montessori Elementary School Rockford · Rockford SD 205 | Elementary | 52.0% | +11.7pp |
| 10 | Winnebago Middle School Winnebago · Winnebago CUSD 323 | Middle | 51.5% | +11.2pp |
| 11 | Durand Jr High School Durand · Durand CUSD 322 | Middle | 50.0% | +9.7pp |
| 12 | Olson Park Elem School Machesney Park · Harlem UD 122 | Elementary | 48.7% | +8.4pp |
| 13 | Pecatonica Comm Middle School Pecatonica · Pecatonica CUSD 321 | Middle | 48.6% | +8.3pp |
| 14 | Brookview Elem School Rockford · Rockford SD 205 | Elementary | 45.3% | +5.0pp |
| 15 | Durand Elem School Durand · Durand CUSD 322 | Elementary | 44.7% | +4.4pp |
| 16 | Jean McNair Elementary School Winnebago · Winnebago CUSD 323 | Elementary | 44.0% | +3.7pp |
| 17 | Ralston Elem School Machesney Park · Harlem UD 122 | Elementary | 38.2% | -2.1pp |
| 18 | Loves Park Elem School Loves Park · Harlem UD 122 | Elementary | 37.8% | -2.5pp |
| 19 | Harlem Middle School Loves Park · Harlem UD 122 | Middle | 36.8% | -3.5pp |
| 20 | Swan Hillman Elem School Rockford · Rockford SD 205 | Elementary | 33.7% | -6.6pp |
| 21 | Cherry Valley Elementary School Rockford · Rockford SD 205 | Elementary | 33.6% | -6.7pp |
| 22 | Windsor Elem School Loves Park · Harlem UD 122 | Elementary | 31.1% | -9.2pp |
| 23 | Legacy Acad of Excellence Charter Rockford · Rockford SD 205 | Elementary | 31.0% | -9.3pp |
| 24 | South Beloit Jr High School South Beloit · County of Winnebago SD 320 | Middle | 30.6% | -9.7pp |
| 25 | Machesney Elem School Machesney Park · Harlem UD 122 | Elementary | 28.4% | -11.9pp |
| 26 | Barbour Two-Way Lang Immersion Rockford · Rockford SD 205 | Elementary | 28.2% | -12.1pp |
| 27 | Arthur Froberg Elem School Rockford · Rockford SD 205 | Elementary | 27.6% | -12.7pp |
| 28 | Spring Creek Elem School Rockford · Rockford SD 205 | Elementary | 25.9% | -14.4pp |
| 29 | Bernard W Flinn Middle School Rockford · Rockford SD 205 | Middle | 25.5% | -14.8pp |
| 30 | Eisenhower Middle School Rockford · Rockford SD 205 | Middle | 25.1% | -15.2pp |
| 31 | Rolling Green Rockford · Rockford SD 205 | Elementary | 25.0% | -15.3pp |
| 32 | Maud E Johnson Elem School Rockford · Rockford SD 205 | Elementary | 23.7% | -16.6pp |
| 33 | R K Welsh Elem School Rockford · Rockford SD 205 | Elementary | 20.9% | -19.4pp |
| 34 | West Middle School Rockford · Rockford SD 205 | Middle | 19.3% | -21.0pp |
| 35 | Maple Elem School Loves Park · Harlem UD 122 | Elementary | 17.1% | -23.2pp |
| 36 | Whitehead Elem School Rockford · Rockford SD 205 | Elementary | 17.1% | -23.2pp |
| 37 | Rock Cut Elem School Loves Park · Harlem UD 122 | Elementary | 16.3% | -24.0pp |
| 38 | Riverdahl Elem School Rockford · Rockford SD 205 | Elementary | 15.7% | -24.6pp |
| 39 | West View Elem School Rockford · Rockford SD 205 | Elementary | 15.5% | -24.8pp |
| 40 | McIntosh Elementary Rockford · Rockford SD 205 | Elementary | 15.0% | -25.3pp |
| 41 | Blackhawk Elementary School South Beloit · County of Winnebago SD 320 | Middle | 14.9% | -25.4pp |
| 42 | Galapagos Rockford Charter Sch Rockford · Rockford SD 205 | Elementary | 14.5% | -25.8pp |
| 43 | Clifford P Carlson Elem School Rockford · Rockford SD 205 | Elementary | 13.6% | -26.7pp |
| 44 | Rockford Envrnmntl Science Acad Rockford · Rockford SD 205 | Middle | 13.6% | -26.7pp |
| 45 | Gregory Elem School Rockford · Rockford SD 205 | Elementary | 12.9% | -27.4pp |
| 46 | Washington Elementary School Rockford · Rockford SD 205 | Elementary | 12.7% | -27.6pp |
| 47 | Abraham Lincoln Middle School Rockford · Rockford SD 205 | Middle | 10.2% | -30.1pp |
| 48 | Julia Lathrop Elem School Rockford · Rockford SD 205 | Elementary | 8.9% | -31.4pp |
| 49 | C Henry Bloom Elem School Rockford · Rockford SD 205 | Elementary | 8.3% | -32.0pp |
| 50 | Conklin Elem School Rockford · Rockford SD 205 | Elementary | 7.7% | -32.6pp |
About this ranking
Schools are ranked by the percentage of students who scored at or above the IAR + ISA % Proficient (Levels 4-5) threshold on the latest available IAR + ISA Science test (school year 2024-25). Only public schools in Winnebago County, Illinois with a reasonable cohort size are shown. A higher percentage is better.
The comparison column shows the gap to the Illinois statewide enrollment-weighted average. To compare against neighboring counties, use the full Illinois ranking.