Enrollment
604
Connecticut · 2024-25 NCES data
High school (grades 9-12) · Seymour, CT
Seymour High School
Federal NCES profile for Seymour High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 46/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 090399000793
👥 S:T ratio 50
📚 AP courses 45
🌟 Gifted program 30
🎓 Counselors 70
📋 Attendance 34
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Seymour High School earns 46/100 on the Resource Investment Index, with class sizes near the Connecticut median.
- #2 of 4
- public schools in Seymour · Resource Index
- 46
- Resource Index · Typical
- 12.6:1
- students per teacher
- 30.9%
- free-lunch eligible
Seymour High School has class sizes near the Connecticut median. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Seymour High School ranks #2 of 4 public schools in Seymour, CT.
School address
District: Seymour School District · Connecticut
NCES ID 090399000793 Verify on NCES CCD record →
Teachers (FTE)
48.0
Federal CCD staff survey
Students per teacher
12.6:1
vs 12.1:1 Connecticut avg
+4% vs state
Free-lunch eligible
30.9%
vs 36.4% Connecticut avg
-15% vs state
Student-teacher ratio in context
How Seymour High School compares with Connecticut and U.S. medians
What stands out at Seymour High School
Seymour High School is a mid-sized high school in Seymour, Connecticut, enrolling 604 students.
Class loads run somewhat heavier than typical: 12.6:1 puts it in the larger third of Connecticut schools by student-teacher ratio.
Its free-meal eligibility rate of 30.9% lands close to the Connecticut typical range, neither a high- nor low-need campus by this measure.
Enrollment of 604 puts it in the larger third of Connecticut schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 1,003 scored Connecticut schools.
Against 196 statewide peers matched on enrollment and economic need, it ranks mid-pack at #122.
Its student body is led by White (65%) and Hispanic or Latino (21%) (diversity index 53/100).
On the academic-pipeline side it reports 9 Advanced Placement courses.
Counselor coverage is strong, about 151 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 26.3% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Seymour School District also operates Chatfield-Lopresti School (515 students) and Seymour Middle School (494 students) alongside Seymour 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 Seymour High School compares
Seymour High School on the metrics families compare, against Connecticut and U.S. means.
| Metric | This school | vs Connecticut | Connecticut avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.6:1 | ▲ 4% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 30.9% | ▼ 15% | 36.4% | 51.7% |
| Enrollment | 604 | top 22% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.6:1
Leaner classes than 70% of US schools, among the more generously staffed nationally.
604
Bigger than 73% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
30.9%
free-lunch eligible
- 15% below the Connecticut average of 36.4%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
12.6:1
students per teacher
- 4% above state mean
Top 69% in Connecticut - lower ratio than 31% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
26.3%
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
$21,347
per pupil, district-wide
- below Connecticut avg of $23,870
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 151 students, the combined health-and-guidance staffing load for this school.
Discipline context
41
in-school suspensions + 48 out-of-school
Suspension rate: 6.8 per 100 students. Combined in-school and out-of-school rate: 14.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 64.5%
Hispanic or Latino 21.4%
African American 8.0%
Two or More 3.2%
Asian 3.0%
Largest group: White at 64.5% of enrollment.
Student-body diversity index 53.0/100
Simpson diversity index - at 53.0, Seymour High School is more mixed than the Connecticut school average of 50.5.
Programs
AP courses offered 9
Funding & spending
District-wide per-pupil expenditure for Seymour School District, which includes Seymour High School.
$21,347
Per student
-11%
vs Connecticut
Avg $23,870
+29%
vs U.S.
Avg $16,593
Revenue mix
Local 52.6%
State 39.0%
Federal 8.4%
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 Seymour High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Chatfield-Lopresti School | Similar size | Similar economic need | Higher S:T ratio |
| Seymour Middle School | Similar size | Similar economic need | Similar S:T ratio |
| Bungay School | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Seymour High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 515
- Students per teacher
- 14.7:1
- Resource Index
- 41/100
- Enrollment
- 494
- Students per teacher
- 12.7:1
- Resource Index
- 47/100
- Enrollment
- 478
- Students per teacher
- 16.5:1
- Resource Index
- 33/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Connecticut, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~604 students)
Next steps
Verify locally before acting on Seymour High School's federal record.
- Compare Seymour High School against another school. Compare schools
- Seymour School District'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 Seymour High School
How many students attend Seymour High School?
Seymour High School has 604 students enrolled. It is a high school in Seymour, CT.
What is the student-teacher ratio at Seymour High School?
The student-teacher ratio at Seymour High School is 12.6:1, which is 4% higher than the Connecticut average of 12.1:1 and 20% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Seymour High School?
30.9% of students at Seymour High School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Seymour High School?
The largest demographic group at Seymour High School is White at 64.5% of enrollment, in Seymour, CT. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 53.0/100.
What is the Resource Investment Index for Seymour High School?
Seymour High School has a Resource Investment Index of 46/100 (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 Seymour High School rank among public schools in Seymour?
By Resource Investment Index, Seymour High School ranks #2 of 4 public schools in Seymour, CT. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Seymour on the city page.
Is Seymour High School a good school?
Seymour High School earns 46/100 on the Resource Investment Index, with class sizes near the Connecticut 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 Seymour School District?
Besides Seymour High School, Seymour School District also operates Chatfield-Lopresti School (515 students), Seymour Middle School (494 students), and Bungay School (478 students). See the Seymour School District 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.