Enrollment
650
New York · 2024-25 NCES data
High school (grades 9-12) · Seaford, NY
Seaford Senior High School
Federal NCES profile for Seaford Senior High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 68/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 362640003620
👥 S:T ratio 62
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 68
📋 Attendance 80
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Seaford Senior High School earns 68/100 on the Resource Investment Index, with class sizes smaller than 76% of New York schools.
- #1 of 5
- public schools in Seaford · Resource Index
- 68
- Resource Index · Higher
- 9.6:1
- small classes for New York
- 14.1%
- free-lunch eligible
Seaford Senior High School has class sizes smaller than 76% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Seaford Senior High School ranks #1 of 5 public schools in Seaford, NY.
School address
District: Seaford Union Free School District · New York
NCES ID 362640003620 Verify on NCES CCD record →
Teachers (FTE)
68.0
Federal CCD staff survey
Students per teacher
9.6:1
vs 11.8:1 New York avg
-19% vs state
Free-lunch eligible
14.1%
vs 56.2% New York avg
-75% vs state
Student-teacher ratio in context
How Seaford Senior High School compares with New York and U.S. medians
What stands out at Seaford Senior High School
Seaford Senior High School is a lower-poverty, mid-sized high school in Seaford, New York, enrolling 650 students.
Class sizes run a bit leaner than typical: 9.6:1 puts it in the smaller third of New York schools by student-teacher ratio.
Comparatively few students face economic hardship here, 14.1% free-meal eligibility runs 75% below the New York average.
Enrollment of 650 puts it in the larger third of New York schools by headcount.
Its Resource Investment Index outscores 94% of the 4,801 New York schools with a score on record, a top-tier result on this measure.
Among 495 similarly sized, similarly resourced-need New York schools statewide, it ranks #38, a top-tier result once campus size and economic need are matched.
Its student body is predominantly White (82% of enrollment) (diversity index 31/100).
On the academic-pipeline side it reports 22 Advanced Placement courses.
Counselor coverage is strong, about 163 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance holds up well here: only 8.2% of students were chronically absent, below the typical post-pandemic national figure.
Seaford Union Free School District also operates Seaford Harbor School (544 students) and Seaford Middle School (522 students) alongside Seaford Senior 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 Seaford Senior High School compares
Seaford Senior High 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 | 9.6:1 | ▼ 19% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 14.1% | ▼ 75% | 56.2% | 51.7% |
| Enrollment | 650 | top 22% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.6:1
Leaner classes than 91% of US schools, among the more generously staffed nationally.
650
Bigger than 77% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
14.1%
free-lunch eligible
- 75% 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
9.6:1
students per teacher
- 19% below state mean
Top 24% in New York - lower ratio than 76% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
8.2%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$31,380
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
Counselors4.0 FTE
Per 163 students, the combined health-and-guidance staffing load for this school.
Discipline context
13
in-school suspensions + 13 out-of-school
Suspension rate: 2.0 per 100 students. Combined in-school and out-of-school rate: 4.0 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 82.0%
Hispanic or Latino 11.4%
Asian 4.3%
African American 1.2%
Two or More 1.1%
Largest group: White at 82.0% of enrollment.
Student-body diversity index 31.2/100
Simpson diversity index - at 31.2, Seaford Senior High School is less mixed than the New York school average of 45.5.
Programs
AP courses offered 22
Funding & spending
District-wide per-pupil expenditure for Seaford Union Free School District, which includes Seaford Senior High School.
$31,380
Per student
+19%
vs New York
Avg $26,410
+89%
vs U.S.
Avg $16,593
Revenue mix
Local 68.8%
State 26.3%
Federal 4.9%
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 Seaford Senior High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Seaford Harbor School | Similar size | Similar economic need | Higher S:T ratio |
| Seaford Middle School | Similar size | Similar economic need | Similar S:T ratio |
| Seaford Manor School | Smaller | Similar economic need | Higher S:T ratio |
Comparisons are relative to Seaford Senior High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 544
- Students per teacher
- 11.3:1
- Resource Index
- 47/100
- Enrollment
- 522
- Students per teacher
- 9.2:1
- Resource Index
- 60/100
- Enrollment
- 468
- Students per teacher
- 11.4:1
- Resource Index
- 40/100
Similar high 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 (~650 students)
Next steps
Verify locally before acting on Seaford Senior High School's federal record.
- Compare Seaford Senior High School against another school. Compare schools
- Seaford Union Free 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 Seaford Senior High School
How many students attend Seaford Senior High School?
Seaford Senior High School has 650 students enrolled. It is a high school in Seaford, NY.
What is the student-teacher ratio at Seaford Senior High School?
The student-teacher ratio at Seaford Senior High School is 9.6:1, which is 19% lower than the New York average of 11.8:1 and 39% 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 Seaford Senior High School?
14.1% of students at Seaford Senior High School are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Seaford Senior High School?
The largest demographic group at Seaford Senior High School is White at 82.0% of enrollment, in Seaford, NY.
What is the Resource Investment Index for Seaford Senior High School?
Seaford Senior High School has a Resource Investment Index of 68/100 (higher 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 Seaford Senior High School rank among public schools in Seaford?
By Resource Investment Index, Seaford Senior High School ranks #1 of 5 public schools in Seaford, 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 Seaford on the city page.
Is Seaford Senior High School a good school?
Seaford Senior High School earns 68/100 on the Resource Investment Index, with class sizes smaller than 76% of New York schools. 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 Seaford Union Free School District?
Besides Seaford Senior High School, Seaford Union Free School District also operates Seaford Harbor School (544 students), Seaford Middle School (522 students), and Seaford Manor School (468 students). See the Seaford Union Free 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.