Enrollment
1,823
Illinois · 2024-25 NCES data
High school (grades 9-12) · Alton, IL
Alton High School
Federal NCES profile for Alton High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 54/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 170360000035
👥 S:T ratio 36
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 9
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Alton High School earns 54/100 on the Resource Investment Index, with class sizes larger than 80% of Illinois schools. It is also one of the largest schools in Illinois.
- #3 of 6
- public schools in Alton · Resource Index
- 54
- Resource Index · Higher
- 16.1:1
- large classes for Illinois
- 1,823
- students enrolled
Alton High School has class sizes larger than 80% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Alton High School ranks #3 of 6 public schools in Alton, IL.
School address
Teachers (FTE)
113.0
Federal CCD staff survey
Students per teacher
16.1:1
vs 14:1 Illinois avg
+15% vs state
Student-teacher ratio in context
How Alton High School compares with Illinois and U.S. medians
What stands out at Alton High School
Alton High School is a large high school in Alton, Illinois, enrolling 1,823 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 97% of state schools at 1,823 students.
Its Resource Investment Index sits near the middle of the pack among 3,845 scored Illinois schools.
Its student body is led by White (54%) and African American (28%), more mixed than most schools in the state (diversity index 61/100).
On the academic-pipeline side it reports 27 Advanced Placement courses.
Counselor access is stretched at roughly 456 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Its district draws 15.5% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Discipline events run high: 516 in- and out-of-school suspensions were reported for 1,823 students in the 2021-22 Civil Rights Data Collection.
The federal civil-rights collection also records 13 expulsions at this campus for 2021-22.
Alton Cusd 11 also operates Alton Middle School (1,220 students) and North Elementary School (549 students) alongside Alton 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 Alton High School compares
Alton 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 | 1,823 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.1:1
Leaner classes than 37% of US schools, a middle-of-the-pack class size.
1,823
Bigger than 98% 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 80% in Illinois - lower ratio than 20% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Funding equity
$14,490
per pupil, district-wide
- below Illinois avg of $17,042
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors4.0 FTE
Per 456 students, the combined health-and-guidance staffing load for this school.
Discipline context
298
in-school suspensions + 218 out-of-school
Suspension rate: 16.3 per 100 students. Combined in-school and out-of-school rate: 28.3 per 100 students. Reported via the Civil Rights Data Collection. Includes 13 expulsions.
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 54.1%
African American 28.4%
Two or More 11.1%
Hispanic or Latino 5.8%
Asian 0.4%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 54.1% of enrollment.
Student-body diversity index 61.1/100
Simpson diversity index - at 61.1, Alton High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 27
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Alton Cusd 11, which includes Alton High School.
$14,490
Per student
-15%
vs Illinois
Avg $17,042
-13%
vs U.S.
Avg $16,593
Revenue mix
Local 43.9%
State 40.6%
Federal 15.5%
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 Alton High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Alton Middle School | Smaller | No free-lunch data | Lower S:T ratio |
| North Elementary School | Smaller | No free-lunch data | Similar S:T ratio |
| East Elementary School | Smaller | No free-lunch data | Lower S:T ratio |
| West Elementary School | Smaller | No free-lunch data | Lower S:T ratio |
| Lewis & Clark Elem School | Smaller | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Alton High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,220
- Students per teacher
- 13.1:1
- Resource Index
- 39/100
- Enrollment
- 549
- Students per teacher
- 15.3:1
- Resource Index
- 23/100
- Enrollment
- 415
- Students per teacher
- 13.4:1
- Resource Index
- 25/100
- Enrollment
- 407
- Students per teacher
- 13.6:1
- Resource Index
- 39/100
- Enrollment
- 251
- Students per teacher
- 12.6:1
- Resource Index
- 27/100
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 (~1,823 students)
Next steps
Verify locally before acting on Alton High School's federal record.
- Compare Alton High School against another school. Compare schools
- Alton Cusd 11'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 Alton High School
How many students attend Alton High School?
Alton High School has 1,823 students enrolled. It is a high school in Alton, IL.
What is the student-teacher ratio at Alton High School?
The student-teacher ratio at Alton 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 Alton High School?
The largest demographic group at Alton High School is White at 54.1% of enrollment, in Alton, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 61.1/100.
What is the Resource Investment Index for Alton High School?
Alton High School has a Resource Investment Index of 54/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Alton High School rank among public schools in Alton?
By Resource Investment Index, Alton High School ranks #3 of 6 public schools in Alton, 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 Alton on the city page.
Is Alton High School a good school?
Alton High School earns 54/100 on the Resource Investment Index, with class sizes larger than 80% 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 Alton Cusd 11?
Besides Alton High School, Alton Cusd 11 also operates Alton Middle School (1,220 students), North Elementary School (549 students), and East Elementary School (415 students). See the Alton Cusd 11 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.