- Enrollment
- 2,615
- Students per teacher
- 17.8:1
- Resource Index
- 41/100
Elementary school (grades K-5) · Central Islip, NY
Francis J O'neill School
Federal NCES profile for Francis J O'neill School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 25/100.
2024-25 NCES dataElementary school (grades K-5)NCES 360687000476
👥 S:T ratio 43
🌟 Gifted program 30
📋 Attendance 2
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Francis J O'neill School earns 25/100 on the Resource Investment Index, with class sizes larger than 82% of New York schools.
- #2 of 4
- elementary schools in Central Islip · Resource Index
- 25
- Resource Index · Lower
- 14.3:1
- large classes for New York
- 75.4%
- free-lunch eligible
Francis J O'neill School has class sizes larger than 82% of New York schools. Computed live against every New York school reporting to NCES.
By Resource Investment Index, Francis J O'neill School ranks #2 of 4 elementary schools in Central Islip, NY.
School address
District: Central Islip Union Free School District · New York
NCES ID 360687000476 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-22 students YoY
Francis J O'neill School held near 592 students from 2022-23 to 2023-24 (-22 headcount).
Teacher FTE added 42.0 → 43.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-22 students YoY 360687000476 · Central Islip, NY Elementary · MID · TRAD
600 enr · 14.3:1 · 75.4% lunch · RII 25
Nearest enrollment peer: Central Islip Senior High School (2,615 students)
Francis J O'neill School held near 592 students from 2022-23 to 2023-24 (-22 headcount). Teacher FTE added 42.0 → 43.5 across the same CCD years. Read with this school → · District book → · New York schools → · Find another →
Francis J O'neill School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Central Islip
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
- This school 600
Francis J O'neill School
600 students
- Marguerite L M 567
Marguerite L Mulvey School
567 students
What this shows Francis J O'neill School reports 600 students on the CCD universe file.
How Francis J O'neill School compares
Francis J O'neill 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 | 14.3:1 | ▲ 21% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 75.4% | ▲ 34% | 56.2% | 51.7% |
| Enrollment | 600 | top 26% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.3:1
Leaner classes than 54% of US schools, a middle-of-the-pack class size.
600
Bigger than 73% of US schools by enrollment, mid-sized for the country.
Equity indicators methodology
Economic need
75.4%
free-lunch eligible
- 34% 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
14.3:1
students per teacher
- 21% above state mean
Top 82% in New York - lower ratio than 18% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
39.3%
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
$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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 73.8%
African American 19.0%
Two or More 3.3%
White 2.3%
Asian 1.0%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.2%
Largest group: Hispanic or Latino at 73.8% of enrollment.
Student-body diversity index 41.8/100
Simpson diversity index - at 41.8, Francis J O'neill School is less mixed than the New York school average of 45.5.
Programs
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 Francis J O'neill School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Central Islip Senior High School | Larger | Similar economic need | Higher S:T ratio |
| Ralph Reed School | Larger | Similar economic need | Similar S:T ratio |
| Charles a Mulligan Elementary School | Larger | Similar economic need | Similar S:T ratio |
| Andrew T Morrow School | Larger | Similar economic need | Similar S:T ratio |
| Marguerite L Mulvey School | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Francis J O'neill School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,192
- Students per teacher
- 14.5:1
- Resource Index
- 23/100
- 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
- 567
- Students per teacher
- 14.5:1
- Resource Index
- 24/100
Nationwide elementary 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 (~600 students)
Frequently asked questions about Francis J O'neill School
How many students attend Francis J O'neill School?
Francis J O'neill School has 600 students enrolled. It is an elementary school in Central Islip, NY. CCD year-over-year: 614 (2022-23) → 592 (2023-24), nearly flat (-22).
What is the student-teacher ratio at Francis J O'neill School?
The student-teacher ratio at Francis J O'neill School is 14.3:1, which is 21% higher than the New York average of 11.8:1 and 9% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Francis J O'neill School?
75.4% of students at Francis J O'neill School are eligible for free lunch, compared to the New York average of 56.2%.
What is the racial and ethnic makeup of Francis J O'neill School?
The largest demographic group at Francis J O'neill School is Hispanic or Latino at 73.8% of enrollment, in Central Islip, NY.
What is the Resource Investment Index for Francis J O'neill School?
Francis J O'neill School has a Resource Investment Index of 25/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Francis J O'neill School rank among elementary schools in Central Islip?
By Resource Investment Index, Francis J O'neill School ranks #2 of 4 elementary 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 elementary schools in Central Islip on the city page.
What other schools are in Central Islip Union Free School District?
Besides Francis J O'neill School, Central Islip Union Free School District also operates Central Islip Senior High School (2,615 students), Ralph Reed School (1,192 students), and Charles a Mulligan Elementary School (997 students). See the Central Islip Union Free School District district page for the complete list.