Enrollment
317
Illinois · 2024-25 NCES data
High school (grades 9-12) · Sullivan, IL
Sullivan High School
Federal NCES profile for Sullivan High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 47/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173813003906
👥 S:T ratio 45
📚 AP courses 50
🌟 Gifted program 30
🎓 Counselors 68
📋 Attendance 42
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Sullivan High School earns 47/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #2 of 3
- public schools in Sullivan · Resource Index
- 47
- Resource Index · Typical
- 13.8:1
- students per teacher
- 317
- students enrolled
Sullivan High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Sullivan High School ranks #2 of 3 public schools in Sullivan, IL.
School address
District: Sullivan Cusd 300 · Illinois
NCES ID 173813003906 Verify on NCES CCD record →
Teachers (FTE)
23.0
Federal CCD staff survey
Students per teacher
13.8:1
vs 14:1 Illinois avg
-1% vs state
Student-teacher ratio in context
How Sullivan High School compares with Illinois and U.S. medians
What stands out at Sullivan High School
Sullivan High School is a mid-sized high school in Sullivan, Illinois, enrolling 317 students.
At 13.8:1, its student-teacher ratio sits close to the Illinois median, within a few percentage points of the 14:1 state norm, neither notably crowded nor notably small.
With 317 students, its enrollment sits close to the Illinois median campus size.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is predominantly White (92% of enrollment) (diversity index 14/100).
On the academic-pipeline side it reports 10 Advanced Placement courses.
Counselor coverage is strong, about 159 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance runs somewhat below the norm, with 23.3% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Sullivan Cusd 300 spends $10,588 per pupil, 38% below the Illinois average, a leaner-resourced district than most.
Its district draws 16.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Sullivan Cusd 300 also operates Sullivan Elem School (565 students) and Sullivan Middle School (266 students) alongside Sullivan 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 Sullivan High School compares
Sullivan 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 | 13.8:1 | ▼ 1% | 14:1 | 15.7:1 |
| Enrollment | 317 | top 60% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.8:1
Leaner classes than 59% of US schools, a middle-of-the-pack class size.
317
Bigger than 35% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
13.8:1
students per teacher
- 1% below state mean
Top 53% in Illinois - lower ratio than 47% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
23.3%
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
$10,588
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 159 students, the combined health-and-guidance staffing load for this school.
Discipline context
41
in-school suspensions + 19 out-of-school
Suspension rate: 12.9 per 100 students. Combined in-school and out-of-school rate: 18.9 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 92.4%
Two or More 3.8%
Hispanic or Latino 2.5%
African American 0.6%
Asian 0.3%
American Indian / Alaska Native 0.3%
Largest group: White at 92.4% of enrollment.
Student-body diversity index 14.4/100
Simpson diversity index - at 14.4, Sullivan High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 10
Funding & spending
District-wide per-pupil expenditure for Sullivan Cusd 300, which includes Sullivan High School.
$10,588
Per student
-38%
vs Illinois
Avg $17,042
-36%
vs U.S.
Avg $16,593
Revenue mix
Local 37.5%
State 46.3%
Federal 16.2%
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 Sullivan High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sullivan Elem School | Larger | No free-lunch data | Higher S:T ratio |
| Sullivan Middle School | Similar size | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Sullivan High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 565
- Students per teacher
- 20.9:1
- Resource Index
- 38/100
- Enrollment
- 266
- Students per teacher
- 12.1:1
- Resource Index
- 47/100
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 (~317 students)
Similar student-teacher ratio (~13.8:1)
Next steps
Verify locally before acting on Sullivan High School's federal record.
- Compare Sullivan High School against another school. Compare schools
- Sullivan Cusd 300'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 Sullivan High School
How many students attend Sullivan High School?
Sullivan High School has 317 students enrolled. It is a high school in Sullivan, IL.
What is the student-teacher ratio at Sullivan High School?
The student-teacher ratio at Sullivan High School is 13.8:1, which is 1% lower than the Illinois average of 14:1 and 12% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Sullivan High School?
The largest demographic group at Sullivan High School is White at 92.4% of enrollment, in Sullivan, IL.
What is the Resource Investment Index for Sullivan High School?
Sullivan High School has a Resource Investment Index of 47/100 (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 Sullivan High School rank among public schools in Sullivan?
By Resource Investment Index, Sullivan High School ranks #2 of 3 public schools in Sullivan, 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 Sullivan on the city page.
Is Sullivan High School a good school?
Sullivan High School earns 47/100 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 Sullivan Cusd 300?
Besides Sullivan High School, Sullivan Cusd 300 also operates Sullivan Elem School (565 students) and Sullivan Middle School (266 students). See the Sullivan Cusd 300 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.