Enrollment
969
Illinois · 2024-25 NCES data
High school (grades 9-12) · Dolton, IL
Thornridge High School
Federal NCES profile for Thornridge High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 173897003954
👥 S:T ratio 46
📚 AP courses 40
🌟 Gifted program 30
🎓 Counselors 52
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Thornridge High School earns 34/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #2 of 9
- public schools in Dolton · Resource Index
- 34
- Resource Index · Typical
- 13.5:1
- students per teacher
- 969
- students enrolled
Thornridge High School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Thornridge High School ranks #2 of 9 public schools in Dolton, IL.
School address
District: Thornton Twp Hsd 205 · Illinois
NCES ID 173897003954 Verify on NCES CCD record →
Teachers (FTE)
72.0
Federal CCD staff survey
Students per teacher
13.5:1
vs 14:1 Illinois avg
-4% vs state
Student-teacher ratio in context
How Thornridge High School compares with Illinois and U.S. medians
What stands out at Thornridge High School
Thornridge High School is a large high school in Dolton, Illinois, enrolling 969 students.
At 13.5:1, 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.
By headcount it is one of the larger campuses in Illinois, bigger than 93% of state schools at 969 students.
Its Resource Investment Index lands in the lower third of 3,845 scored Illinois schools.
Its student body is predominantly African American (89% of enrollment) (diversity index 20/100).
On the academic-pipeline side it reports 8 Advanced Placement courses.
Counselor coverage is strong, about 242 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 92.3% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Thornton Twp Hsd 205 spends $21,928 per pupil, 29% above the Illinois average, a better-resourced district than most.
Discipline events run high: 273 in- and out-of-school suspensions were reported for 969 students in the 2021-22 Civil Rights Data Collection.
Thornton Twp Hsd 205 also operates Thornwood High School (1,843 students) and Thornton Township High School (1,697 students) alongside Thornridge 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 Thornridge High School compares
Thornridge 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 | 13.5:1 | ▼ 4% | 14:1 | 15.7:1 |
| Enrollment | 969 | top 7% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.5:1
Leaner classes than 62% of US schools, a middle-of-the-pack class size.
969
Bigger than 91% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
13.5:1
students per teacher
- 4% below state mean
Top 49% in Illinois - lower ratio than 51% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
92.3%
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
$21,928
per pupil, district-wide
- above Illinois avg of $17,042
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 242 students, the combined health-and-guidance staffing load for this school.
Discipline context
2
in-school suspensions + 271 out-of-school
Suspension rate: 0.2 per 100 students. Combined in-school and out-of-school rate: 28.2 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
African American 89.0%
Hispanic or Latino 8.3%
Two or More 2.1%
White 0.5%
American Indian / Alaska Native 0.2%
Largest group: African American at 89.0% of enrollment.
Student-body diversity index 20.1/100
Simpson diversity index - at 20.1, Thornridge High School is less mixed than the Illinois school average of 38.9.
Programs
AP courses offered 8
Funding & spending
District-wide per-pupil expenditure for Thornton Twp Hsd 205, which includes Thornridge High School.
$21,928
Per student
+29%
vs Illinois
Avg $17,042
+32%
vs U.S.
Avg $16,593
Revenue mix
Local 56.3%
State 35.7%
Federal 8.0%
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 Thornridge High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Thornwood High School | Larger | No free-lunch data | Similar S:T ratio |
| Thornton Township High School | Larger | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Thornridge High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,843
- Students per teacher
- 12.7:1
- Resource Index
- 42/100
- Enrollment
- 1,697
- Students per teacher
- 14.5:1
- 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 (~969 students)
Next steps
Verify locally before acting on Thornridge High School's federal record.
- Compare Thornridge High School against another school. Compare schools
- Thornton Twp Hsd 205'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 Thornridge High School
How many students attend Thornridge High School?
Thornridge High School has 969 students enrolled. It is a high school in Dolton, IL.
What is the student-teacher ratio at Thornridge High School?
The student-teacher ratio at Thornridge High School is 13.5:1, which is 4% lower than the Illinois average of 14:1 and 14% 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 Thornridge High School?
The largest demographic group at Thornridge High School is African American at 89.0% of enrollment, in Dolton, IL.
What is the Resource Investment Index for Thornridge High School?
Thornridge High School has a Resource Investment Index of 34/100 (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 Thornridge High School rank among public schools in Dolton?
By Resource Investment Index, Thornridge High School ranks #2 of 9 public schools in Dolton, 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 Dolton on the city page.
Is Thornridge High School a good school?
Thornridge High School earns 34/100 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 Thornton Twp Hsd 205?
Besides Thornridge High School, Thornton Twp Hsd 205 also operates Thornwood High School (1,843 students) and Thornton Township High School (1,697 students). See the Thornton Twp Hsd 205 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.