Wilmington Middle School
School pathway
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 73 of every 100 students at this school read and write at grade level and about 38 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 3 points since 2023, while math scores are up about 4 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 55% of students here test proficient in math and reading, compared with the roughly 44% typical for Illinois schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Illinois's top nor bottom 10%.
7-year change
SY 2017-18 vs SY 2024-25About Wilmington Middle School
Wilmington Middle School, a low-enrollment junior high in Wilmington, Illinois, overseen by Wilmington CUSD 209U, enrolls 254 students, covering grades 6 through 8. That puts it 45% below the typical public school in Illinois, which averages around 462 students.
Across the 4 schools in Wilmington CUSD 209U (1,261 students total), Wilmington Middle School accounts for its share of the district's footprint.
On demographics, Wilmington Middle School lists that nearly all students (86%) are White. The remainder consists of 9% Hispanic, 4% multiracial. That is noticeably more White than the county at large, where the share is closer to 62%.
In terms of school funding signals, On paper, Wilmington Middle School has 21 full-time-equivalent teachers, translating to a class-load average of around 12.3:1. The state averages around 13.0:1, so this campus is tighter than the state norm typical. An estimated 47% of students are eligible for free or reduced-price lunch, often used as a Title I proxy.
After controlling for student poverty, Wilmington Middle School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 44.5%, the actual is 54.8%, a residual of +10.3 points.
Across the wider county, community-level numbers for Will County indicate the typical household earns roughly $109,984 per year, 38% of adults hold a bachelor's degree or higher, and roughly 6% of residents live below the federal poverty line. In all, Will County runs 209 public schools (combined enrollment of about 113,008 students), of which Wilmington Middle School is one.
Nearest neighbor: L J Stevens Intermediate School, around 0.1 miles off. Counting just inside five miles, 5 other public schools cluster around Wilmington Middle School. On composite proficiency, Wilmington Middle School comes 3rd of 8 in the immediate cluster, higher than the nearby-schools average of 49.4%.
The school occupies a small-town site.
Over the past 7-year window. Looking back 7 years, enrollment at Wilmington Middle School has shrank 12%, going from 288 students in 2018 to 254 in 2025. The White share of enrollment decreased from 93% to 86% over that span. Class-load math has tightened: from 13.7:1 in 2018 to 12.3:1 in 2025.
On allk12, recent activity here tends to focus on classroom updates, athletics, and weather closures. Parents, students, alumni, and staff are welcome to weigh in.
Will County at a glance
View full county profileQuick facts
Related schools
- Wilmington High SchoolHigh · 432 students
- L J Stevens Intermediate SchoolElementary · 353 students
- Bruning Elem SchoolElementary · 222 students
- Wilmington High SchoolHigh · 432 students
- L J Stevens Intermediate SchoolElementary · 353 students
- Bruning Elem SchoolElementary · 222 students
- SOWIC Education CenterElementary
- SOWIC-EC WilmingtonElementary
- SOWIC-Educ & Life Skills-WilmingtElementary
- L J Stevens Intermediate School0.1 mi · 353
- Wilmington High School0.4 mi · 432
- Bruning Elem School1.4 mi · 222
- Reed-Custer High School4.6 mi · 397
- Reed-Custer Middle School4.7 mi · 306
- Reed-Custer Elementary School5.1 mi · 690