Enrollment
928
New York · 2024-25 NCES data
Middle school (grades 6-8) · Holbrook, NY
Seneca Middle School
Federal NCES profile for Seneca Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 42/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 362535003509
👥 S:T ratio 55
🌟 Gifted program 30
🎓 Counselors 38
📋 Attendance 47
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Seneca Middle School earns 42/100 on the Resource Investment Index, with class sizes near the New York median.
- #3 of 5
- public schools in Holbrook · Resource Index
- 42
- Resource Index · Typical
- 11.3:1
- students per teacher
- 20.3%
- free-lunch eligible
Seneca Middle School has class sizes near the New York median. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Seneca Middle School ranks #3 of 5 public schools in Holbrook, NY.
School address
District: Sachem Central School District · New York
NCES ID 362535003509 Verify on NCES CCD record →
Teachers (FTE)
82.0
Federal CCD staff survey
Students per teacher
11.3:1
vs 11.8:1 New York avg
-4% vs state
Free-lunch eligible
20.3%
vs 56.2% New York avg
-64% vs state
Student-teacher ratio in context
How Seneca Middle School compares with New York and U.S. medians
What stands out at Seneca Middle School
Seneca Middle School is a large middle school in Holbrook, New York, enrolling 928 students.
At 11.3:1, its student-teacher ratio sits close to the New York median, within a few percentage points of the 11.8:1 state norm, neither notably crowded nor notably small.
Comparatively few students face economic hardship here, 20.3% free-meal eligibility runs 64% below the New York average.
By headcount it is one of the larger campuses in New York, bigger than 90% of state schools at 928 students.
Its Resource Investment Index sits near the middle of the pack among 4,801 scored New York schools.
Against 373 statewide peers matched on enrollment and economic need, it ranks mid-pack at #260.
Its student body is led by White (64%) and Hispanic or Latino (22%) (diversity index 53/100).
Counselor coverage runs a bit thin, about 309 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Attendance runs somewhat below the norm, with 21.3% of students chronically absent per the 2021-22 civil-rights collection.
Sachem Central School District also operates Sachem High School North (2,008 students) and Sachem High School East (1,984 students) alongside Seneca Middle 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 Seneca Middle School compares
Seneca Middle School on the metrics families compare, against New York and U.S. means.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 11.3:1 | ▼ 4% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 20.3% | ▼ 64% | 56.2% | 51.7% |
| Enrollment | 928 | top 10% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11.3:1
Leaner classes than 81% of US schools, among the more generously staffed nationally.
928
Bigger than 90% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
20.3%
free-lunch eligible
- 64% below the New York average of 56.2%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
11.3:1
students per teacher
- 4% below state mean
Top 49% in New York - lower ratio than 51% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
21.3%
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
$26,466
per pupil, district-wide
- above New York avg of $26,410
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors3.0 FTE
Per 309 students, the combined health-and-guidance staffing load for this school.
Discipline context
79
in-school suspensions + 34 out-of-school
Suspension rate: 8.5 per 100 students. Combined in-school and out-of-school rate: 12.2 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
White 64.3%
Hispanic or Latino 22.1%
Asian 5.7%
Two or More 4.4%
African American 3.3%
American Indian / Alaska Native 0.1%
Largest group: White at 64.3% of enrollment.
Student-body diversity index 53.1/100
Simpson diversity index - at 53.1, Seneca Middle School is more mixed than the New York school average of 45.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Sachem Central School District, which includes Seneca Middle School.
$26,466
Per student
+0%
vs New York
Avg $26,410
+60%
vs U.S.
Avg $16,593
Revenue mix
Local 51.8%
State 42.1%
Federal 6.1%
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 Seneca Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sachem High School North | Larger | Similar economic need | Similar S:T ratio |
| Sachem High School East | Larger | Similar economic need | Similar S:T ratio |
| Sagamore Middle School | Similar size | Similar economic need | Similar S:T ratio |
| Samoset Middle School | Similar size | Similar economic need | Similar S:T ratio |
| Lynwood Avenue School | Smaller | Higher economic need | Higher S:T ratio |
Comparisons are relative to Seneca Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,008
- Students per teacher
- 12:1
- Resource Index
- 51/100
- Enrollment
- 1,984
- Students per teacher
- 11.3:1
- Resource Index
- 50/100
- Enrollment
- 893
- Students per teacher
- 11:1
- Resource Index
- 41/100
- Enrollment
- 847
- Students per teacher
- 10.2:1
- Resource Index
- 44/100
- Enrollment
- 561
- Students per teacher
- 13.4:1
- Resource Index
- 36/100
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of New York, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~928 students)
Next steps
Verify locally before acting on Seneca Middle School's federal record.
- Compare Seneca Middle School against another school. Compare schools
- Sachem Central 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 Seneca Middle School
How many students attend Seneca Middle School?
Seneca Middle School has 928 students enrolled. It is a middle school in Holbrook, NY.
What is the student-teacher ratio at Seneca Middle School?
The student-teacher ratio at Seneca Middle School is 11.3:1, which is 4% lower than the New York average of 11.8:1 and 28% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Seneca Middle School?
20.3% of students at Seneca Middle School are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Seneca Middle School?
The largest demographic group at Seneca Middle School is White at 64.3% of enrollment, in Holbrook, NY. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 53.1/100.
What is the Resource Investment Index for Seneca Middle School?
Seneca Middle School has a Resource Investment Index of 42/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Seneca Middle School rank among public schools in Holbrook?
By Resource Investment Index, Seneca Middle School ranks #3 of 5 public schools in Holbrook, NY. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Holbrook on the city page.
Is Seneca Middle School a good school?
Seneca Middle School earns 42/100 on the Resource Investment Index, with class sizes near the New York 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 Sachem Central School District?
Besides Seneca Middle School, Sachem Central School District also operates Sachem High School North (2,008 students), Sachem High School East (1,984 students), and Sagamore Middle School (893 students). See the Sachem Central 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.