- Enrollment
- 1,192
- Students per teacher
- 14.5:1
- Resource Index
- 23/100
High school (grades 9-12) · Central Islip, NY
Central Islip Senior High School
Federal NCES profile for Central Islip Senior High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 360687000473
👥 S:T ratio 29
🌟 Gifted program 30
🎓 Counselors 13
📋 Attendance 93
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Central Islip Senior High School earns 41/100 on the Resource Investment Index, with class sizes larger than 96% of New York schools. It is also one of the largest schools in New York.
- #1 of 7
- public schools in Central Islip · Resource Index
- 41
- Resource Index · Typical
- 17.8:1
- large classes for New York
- 72.6%
- free-lunch eligible
Central Islip Senior High School has class sizes larger than 96% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Central Islip Senior High School ranks #1 of 7 public schools in Central Islip, NY.
School address
District: Central Islip Union Free School District · New York
NCES ID 360687000473 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+21 students YoY
Central Islip Senior High School held near 2,597 students from 2022-23 to 2023-24 (+21 headcount).
Teacher FTE added 147.9 → 153.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+21 students YoY 360687000473 · Central Islip, NY High · LARGE · TRAD
2,615 enr · 17.8:1 · 72.6% lunch · RII 41
Nearest enrollment peer: Ralph Reed School (1,192 students)
Central Islip Senior High School held near 2,597 students from 2022-23 to 2023-24 (+21 headcount). Teacher FTE added 147.9 → 153.5 across the same CCD years. Read with this school → · District book → · New York schools → · Find another →
Central Islip Senior High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Central Islip Senior High School
2,615 students
- Ralph Reed Sch
Ralph Reed School
1,192 students
- Charles a Mull 997
Charles a Mulligan Elementary School
997 students
- Andrew T Morro 821
Andrew T Morrow School
821 students
- Francis J O'ne 600
Francis J O'neill School
600 students
- Marguerite L M 567
Marguerite L Mulvey School
567 students
What this shows Central Islip Senior High School reports 2,615 students on the CCD universe file.
How Central Islip Senior High School compares
Central Islip Senior High School held steady on CCD headcount: ratios and free-lunch share vs New York and U.S. means.
| Metric | This school | vs New York | New York avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17.8:1 | ▲ 51% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 72.6% | ▲ 29% | 56.2% | 51.7% |
| Enrollment | 2,615 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17.8:1
Leaner classes than 26% of US schools, heavier class loads than most.
2,615
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
72.6%
free-lunch eligible
- 29% above the New York average of 56.2%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
17.8:1
students per teacher
- 51% above state mean
Top 96% in New York - lower ratio than 4% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
2.8%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$29,660
per pupil, district-wide
- above New York avg of $28,120
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors6.0 FTE
Per 436 students, the combined health-and-guidance staffing load for this school.
Discipline context
284
in-school suspensions + 178 out-of-school
Suspension rate: 10.9 per 100 students. Combined in-school and out-of-school rate: 17.7 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 81.2%
African American 14.7%
White 1.6%
Asian 1.4%
Two or More 0.8%
American Indian / Alaska Native 0.2%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Hispanic or Latino at 81.2% of enrollment.
Student-body diversity index 31.9/100
Simpson diversity index - at 31.9, Central Islip Senior High School is less mixed than the New York school average of 45.5.
Programs
AP courses offered 10
District finance for Central Islip Union Free School District reports $29,660 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Central Islip Senior High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Ralph Reed School | Smaller | Similar economic need | Lower S:T ratio |
| Charles a Mulligan Elementary School | Smaller | Similar economic need | Lower S:T ratio |
| Andrew T Morrow School | Smaller | Similar economic need | Lower S:T ratio |
| Francis J O'neill School | Smaller | Similar economic need | Lower S:T ratio |
| Marguerite L Mulvey School | Smaller | Similar economic need | Lower S:T ratio |
Comparisons are relative to Central Islip Senior High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 997
- Students per teacher
- 15.3:1
- Resource Index
- 23/100
- Enrollment
- 821
- Students per teacher
- 13.9:1
- Resource Index
- 25/100
- Enrollment
- 600
- Students per teacher
- 14.3:1
- Resource Index
- 25/100
- Enrollment
- 567
- Students per teacher
- 14.5:1
- Resource Index
- 24/100
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~2,615 students)
Frequently asked questions about Central Islip Senior High School
How many students attend Central Islip Senior High School?
Central Islip Senior High School has 2,615 students enrolled. It is a high school in Central Islip, NY. CCD year-over-year: 2,576 (2022-23) → 2,597 (2023-24), nearly flat (+21).
What is the student-teacher ratio at Central Islip Senior High School?
The student-teacher ratio at Central Islip Senior High School is 17.8:1, which is 51% higher than the New York average of 11.8:1 and 13% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Central Islip Senior High School?
72.6% of students at Central Islip 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 Central Islip Senior High School?
The largest demographic group at Central Islip Senior High School is Hispanic or Latino at 81.2% of enrollment, in Central Islip, NY.
What is the Resource Investment Index for Central Islip Senior High School?
Central Islip Senior High School has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Central Islip Senior High School rank among public schools in Central Islip?
By Resource Investment Index, Central Islip Senior High School ranks #1 of 7 public schools in Central Islip, 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 Central Islip on the city page.
What other schools are in Central Islip Union Free School District?
Besides Central Islip Senior High School, Central Islip Union Free School District also operates Ralph Reed School (1,192 students), Charles a Mulligan Elementary School (997 students), and Andrew T Morrow School (821 students). See the Central Islip Union Free School District district page for the complete list.