Enrollment
462
Illinois · 2024-25 NCES data
High school (grades 9-12) · Williamsville, IL
Williamsville High School
Federal NCES profile for Williamsville 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 174248004271
👥 S:T ratio 40
📚 AP courses 25
🌟 Gifted program 30
🎓 Counselors 54
📋 Attendance 32
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Williamsville High School earns 36/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also less racially and ethnically mixed than most Illinois schools.
- 36
- Resource Index · Typical
- 14.9:1
- students per teacher
- 462
- students enrolled
Williamsville High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
School address
District: Williamsville Cusd 15 · Illinois
NCES ID 174248004271 Verify on NCES CCD record →
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
14.9:1
vs 14:1 Illinois avg
+6% vs state
Student-teacher ratio in context
How Williamsville High School compares with Illinois and U.S. medians
What stands out at Williamsville High School
Williamsville High School is a mid-sized high school in Williamsville, Illinois, enrolling 462 students.
Class loads run somewhat heavier than typical: 14.9:1 puts it in the larger third of Illinois schools by student-teacher ratio.
Enrollment of 462 puts it in the larger third of Illinois schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is predominantly White (93% of enrollment), among the less diverse in the state (diversity index 13/100).
On the academic-pipeline side it reports 5 Advanced Placement courses.
Counselor coverage is strong, about 231 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 27.3% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Williamsville Cusd 15 spends $10,503 per pupil, 38% below the Illinois average, a leaner-resourced district than most.
Williamsville Cusd 15 also operates Sherman Elem School (552 students) and Williamsville Jr High School (444 students) alongside Williamsville 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 Williamsville High School compares
Williamsville 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 | 462 | top 35% | - | - |
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.
462
Bigger than 57% 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
27.3%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$10,503
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
Counselors2.0 FTE
Per 231 students, the combined health-and-guidance staffing load for this school.
Discipline context
24
in-school suspensions + 4 out-of-school
Suspension rate: 5.2 per 100 students. Combined in-school and out-of-school rate: 6.1 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 93.0%
Two or More 3.7%
Hispanic or Latino 1.5%
African American 0.9%
Asian 0.9%
Largest group: White at 93.0% of enrollment.
Student-body diversity index 13.3/100
Simpson diversity index - at 13.3, Williamsville High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 5
Funding & spending
District-wide per-pupil expenditure for Williamsville Cusd 15, which includes Williamsville High School.
$10,503
Per student
-38%
vs Illinois
Avg $17,042
-37%
vs U.S.
Avg $16,593
Revenue mix
Local 53.5%
State 37.8%
Federal 8.7%
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 Williamsville High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sherman Elem School | Similar size | No free-lunch data | Similar S:T ratio |
| Williamsville Jr High School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Williamsville High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 552
- Students per teacher
- 14.2:1
- Resource Index
- 40/100
- Enrollment
- 444
- Students per teacher
- 17.1:1
- Resource Index
- 35/100
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 (~462 students)
Similar student-teacher ratio (~14.9:1)
Next steps
Verify locally before acting on Williamsville High School's federal record.
- Compare Williamsville High School against another school. Compare schools
- Williamsville Cusd 15'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 Williamsville High School
How many students attend Williamsville High School?
Williamsville High School has 462 students enrolled. It is a high school in Williamsville, IL.
What is the student-teacher ratio at Williamsville High School?
The student-teacher ratio at Williamsville 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 Williamsville High School?
The largest demographic group at Williamsville High School is White at 93.0% of enrollment, in Williamsville, IL.
What is the Resource Investment Index for Williamsville High School?
Williamsville High School has a Resource Investment Index of 36/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
Is Williamsville High School a good school?
Williamsville High School earns 36/100 on the Resource Investment Index, with class sizes near the Illinois median. It is also less racially and ethnically mixed than most Illinois schools. 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 Williamsville Cusd 15?
Besides Williamsville High School, Williamsville Cusd 15 also operates Sherman Elem School (552 students) and Williamsville Jr High School (444 students). See the Williamsville Cusd 15 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.