Enrollment
1,218
Illinois · 2024-25 NCES data
High school (grades 9-12) · Troy, IL
Triad High School
Federal NCES profile for Triad High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 37/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173735003870
👥 S:T ratio 36
📚 AP courses 55
🌟 Gifted program 30
🎓 Counselors 19
📋 Attendance 46
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Triad High School earns 37/100 on the Resource Investment Index, with class sizes larger than 82% of Illinois schools. It is also one of the largest schools in Illinois.
- #3 of 3
- public schools in Troy · Resource Index
- 37
- Resource Index · Typical
- 16.1:1
- large classes for Illinois
- 1,218
- students enrolled
Triad High School has class sizes larger than 82% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Triad High School ranks #3 of 3 public schools in Troy, IL.
School address
Teachers (FTE)
75.0
Federal CCD staff survey
Students per teacher
16.1:1
vs 14:1 Illinois avg
+15% vs state
Student-teacher ratio in context
How Triad High School compares with Illinois and U.S. medians
What stands out at Triad High School
Triad High School is a large high school in Troy, Illinois, enrolling 1,218 students.
Class loads run somewhat heavier than typical: 16.1:1 puts it in the larger third of Illinois schools by student-teacher ratio.
By headcount it is one of the larger campuses in Illinois, bigger than 95% of state schools at 1,218 students.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is predominantly White (90% of enrollment) (diversity index 19/100).
On the academic-pipeline side it reports 11 Advanced Placement courses.
Counselor access is stretched at roughly 406 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance runs somewhat below the norm, with 21.6% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Triad Cusd 2 spends $11,966 per pupil, 30% below the Illinois average, a leaner-resourced district than most.
Triad Cusd 2 also operates Triad Middle School (925 students) and Silver Creek Elementary (757 students) alongside Triad 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 Triad High School compares
Triad 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 | 16.1:1 | ▲ 15% | 14:1 | 15.7:1 |
| Enrollment | 1,218 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.1:1
Leaner classes than 38% of US schools, a middle-of-the-pack class size.
1,218
Bigger than 94% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
16.1:1
students per teacher
- 15% above state mean
Top 82% in Illinois - lower ratio than 18% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
21.6%
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
$11,966
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
Counselors3.0 FTE
Per 406 students, the combined health-and-guidance staffing load for this school.
Discipline context
87
in-school suspensions + 6 out-of-school
Suspension rate: 7.1 per 100 students. Combined in-school and out-of-school rate: 7.6 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 89.8%
Two or More 3.8%
Hispanic or Latino 3.0%
African American 2.2%
Asian 0.6%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.2%
Largest group: White at 89.8% of enrollment.
Student-body diversity index 19.1/100
Simpson diversity index - at 19.1, Triad High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 11
Funding & spending
District-wide per-pupil expenditure for Triad Cusd 2, which includes Triad High School.
$11,966
Per student
-30%
vs Illinois
Avg $17,042
-28%
vs U.S.
Avg $16,593
Revenue mix
Local 52.8%
State 38.9%
Federal 8.3%
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 Triad High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Triad Middle School | Similar size | No free-lunch data | Similar S:T ratio |
| Silver Creek Elementary | Smaller | No free-lunch data | Higher S:T ratio |
| C a Henning School | Smaller | No free-lunch data | Similar S:T ratio |
| St Jacob Elem School | Smaller | No free-lunch data | Similar S:T ratio |
| Marine Elem School | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Triad High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 925
- Students per teacher
- 16.7:1
- Resource Index
- 32/100
- Enrollment
- 757
- Students per teacher
- 18.2:1
- Resource Index
- 38/100
- Enrollment
- 706
- Students per teacher
- 15.8:1
- Resource Index
- 41/100
- Enrollment
- 262
- Students per teacher
- 16.4:1
- Resource Index
- 47/100
- Enrollment
- 141
- Students per teacher
- 16.3:1
- Resource Index
- 45/100
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 (~1,218 students)
Next steps
Verify locally before acting on Triad High School's federal record.
- Compare Triad High School against another school. Compare schools
- Triad Cusd 2'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 Triad High School
How many students attend Triad High School?
Triad High School has 1,218 students enrolled. It is a high school in Troy, IL.
What is the student-teacher ratio at Triad High School?
The student-teacher ratio at Triad High School is 16.1:1, which is 15% higher than the Illinois average of 14:1 and 3% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Triad High School?
The largest demographic group at Triad High School is White at 89.8% of enrollment, in Troy, IL.
What is the Resource Investment Index for Triad High School?
Triad High School has a Resource Investment Index of 37/100 (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).
How does Triad High School rank among public schools in Troy?
By Resource Investment Index, Triad High School ranks #3 of 3 public schools in Troy, 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 Troy on the city page.
Is Triad High School a good school?
Triad High School earns 37/100 on the Resource Investment Index, with class sizes larger than 82% of Illinois schools. It is also one of the largest schools in Illinois. 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 Triad Cusd 2?
Besides Triad High School, Triad Cusd 2 also operates Triad Middle School (925 students), Silver Creek Elementary (757 students), and C a Henning School (706 students). See the Triad Cusd 2 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.