Enrollment
432
Illinois · 2024-25 NCES data
High school (grades 9-12) · Wilmington, IL
Wilmington High School
Federal NCES profile for Wilmington High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 36/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 174263004284
👥 S:T ratio 40
📚 AP courses 15
🌟 Gifted program 30
📋 Attendance 57
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Wilmington High School earns 36/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #3 of 4
- public schools in Wilmington · Resource Index
- 36
- Resource Index · Typical
- 14.9:1
- students per teacher
- 432
- students enrolled
Wilmington High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Wilmington High School ranks #3 of 4 public schools in Wilmington, IL.
School address
District: Wilmington Cusd 209u · Illinois
NCES ID 174263004284 Verify on NCES CCD record →
Teachers (FTE)
29.0
Federal CCD staff survey
Students per teacher
14.9:1
vs 14:1 Illinois avg
+6% vs state
Student-teacher ratio in context
How Wilmington High School compares with Illinois and U.S. medians
What stands out at Wilmington High School
Wilmington High School is a mid-sized high school in Wilmington, Illinois, enrolling 432 students.
Class loads run somewhat heavier than typical: 14.9:1 puts it in the larger third of Illinois schools by student-teacher ratio.
With 432 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is predominantly White (81% of enrollment) (diversity index 33/100).
On the academic-pipeline side it reports 3 Advanced Placement courses.
17.1% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Wilmington Cusd 209u spends $12,001 per pupil, 30% below the Illinois average, a leaner-resourced district than most.
Its district draws 18.9% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Wilmington Cusd 209u also operates L J Stevens Intermediate School (353 students) and Wilmington Middle School (254 students) alongside Wilmington High School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Wilmington High School compares
Wilmington High School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.9:1 | ▲ 6% | 14:1 | 15.7:1 |
| Enrollment | 432 | top 40% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.9:1
Leaner classes than 48% of US schools, a middle-of-the-pack class size.
432
Bigger than 52% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
14.9:1
students per teacher
- 6% above state mean
Top 68% in Illinois - lower ratio than 32% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
17.1%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$12,001
per pupil, district-wide
- below Illinois avg of $17,042
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
3
in-school suspensions + 32 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 8.1 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 80.6%
Hispanic or Latino 15.5%
Two or More 2.5%
African American 0.9%
Asian 0.5%
Largest group: White at 80.6% of enrollment.
Student-body diversity index 32.6/100
Simpson diversity index - at 32.6, Wilmington High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 3
Funding & spending
District-wide per-pupil expenditure for Wilmington Cusd 209u, which includes Wilmington High School.
$12,001
Per student
-30%
vs Illinois
Avg $17,042
-28%
vs U.S.
Avg $16,593
Revenue mix
Local 60.7%
State 20.4%
Federal 18.9%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Wilmington High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| L J Stevens Intermediate School | Similar size | No free-lunch data | Similar S:T ratio |
| Wilmington Middle School | Smaller | No free-lunch data | Lower S:T ratio |
| Bruning Elem School | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Wilmington High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 353
- Students per teacher
- 15.3:1
- Resource Index
- 46/100
- Enrollment
- 254
- Students per teacher
- 12.1:1
- Resource Index
- 45/100
- Enrollment
- 222
- Students per teacher
- 17.1:1
- Resource Index
- 40/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Illinois, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~432 students)
Similar student-teacher ratio (~14.9:1)
Next steps
Verify locally before acting on Wilmington High School's federal record.
- Compare Wilmington High School against another school. Compare schools
- Wilmington Cusd 209u's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Wilmington High School
How many students attend Wilmington High School?
Wilmington High School has 432 students enrolled. It is a high school in Wilmington, IL.
What is the student-teacher ratio at Wilmington High School?
The student-teacher ratio at Wilmington High School is 14.9:1, which is 6% higher than the Illinois average of 14:1 and 5% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Wilmington High School?
The largest demographic group at Wilmington High School is White at 80.6% of enrollment, in Wilmington, IL.
What is the Resource Investment Index for Wilmington High School?
Wilmington High School has a Resource Investment Index of 36/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Wilmington High School rank among public schools in Wilmington?
By Resource Investment Index, Wilmington High School ranks #3 of 4 public schools in Wilmington, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Wilmington on the city page.
Is Wilmington High School a good school?
Wilmington High School earns 36/100 on the Resource Investment Index, with class sizes near the Illinois median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Wilmington Cusd 209u?
Besides Wilmington High School, Wilmington Cusd 209u also operates L J Stevens Intermediate School (353 students), Wilmington Middle School (254 students), and Bruning Elem School (222 students). See the Wilmington Cusd 209u district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.