Enrollment
462
Illinois · 2024-25 NCES data
2024-25 NCES data High school (grades 9-12) NCES 174248004271
Williamsville High School — Williamsville, IL
Federal NCES profile for Williamsville High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 35/100.
👥 Class size 36
📚 AP courses 25
🌟 Gifted program 30
🎓 Counselors 54
📋 Attendance 32
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
School address
District: Williamsville Cusd 15 · Illinois
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
15.9:1
vs 14.6:1 Illinois avg
+9% vs state
Student-teacher ratio in context
How Williamsville High School compares with Illinois and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Williamsville High School reports 462 enrolled students to the National Center for Education Statistics (NCES) alongside 31.0 full-time-equivalent teachers, producing a 15.9:1 student-teacher ratio. That figure sits 9% above the Illinois state mean of 14.6:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.9:1, it is 0% higher, a useful calibration for families comparing districts across state lines.
The school offers 5 Advanced Placement courses, a stronger academic pipeline indicator than enrollment alone. Counselor coverage works out to roughly 231 students per counselor, meeting the American School Counselor Association recommendation of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 27.3% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Williamsville Cusd 15 spends $35,786 per pupil district-wide, above the Illinois average of $20,099 and above the national average of $19,490. Revenue comes 53.5% from local sources (property taxes), 37.8% from the state, and 8.7% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 35/100 (F), calculated from 5 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Williamsville High School compares
Cross-validating school-level NCES values against Illinois state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15.9:1 | ▲ 9% | 14.6:1 | 15.9:1 |
| Enrollment | 462 | top 65% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Staffing depth
15.9:1
students per teacher
— 9% above state mean
Top 80% in Illinois — lower ratio than 20% of state schools
Between 15:1 and 20:1 — in line with the typical U.S. public-school staffing range.
Engagement
27.3%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$35,786
per pupil, district-wide
— above Illinois avg of $20,099
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
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
Enrollment 462 Top 65% in Illinois — larger than 35% of 3,845 state schools
Teachers (FTE) 31.0
Students per teacher 15.9:1 +9% vs state
Free-lunch eligible —
NCES ID 174248004271
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.
Programs & staff
AP courses offered 5
Counselors (FTE) 2.0
Students per counselor 231:1
Discipline & special education
Chronically absent 27.3%
In-school suspensions 24
Out-of-school suspensions 4
Funding & spending
District-wide per-pupil expenditure for Williamsville Cusd 15, which includes Williamsville High School.
$35,786
Per student
+78%
vs Illinois
Avg $20,099
+84%
vs U.S.
Avg $19,490
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.
Other Schools in This District
- Enrollment
- 552
- Students per teacher
- 13.5:1
- Enrollment
- 444
- Students per teacher
- 18.2:1
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
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 15.9:1, which is 9% higher than the Illinois average of 14.6:1 and 0% higher than the national average of 15.9:1.
What is the racial and ethnic makeup of Williamsville High School?
The largest demographic group at Williamsville High School is White at 93.0%. The school serves a diverse student body in Williamsville, IL.
What is the Resource Investment Index for Williamsville High School?
Williamsville High School has a Resource Investment Index of 35/100 (F) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.