Central Islip Senior High School vs Francis J O'neill School
A head-to-head comparison of two schools in New York, United States, 1.4 km apart, using official American 2025 data. The better value in each row is highlighted.
Central Islip Senior High School
Central Islip · Public high · Grades 9–12
2,615 students
Francis J O'neill School
Central Islip · Public elementary · Grades K–6
600 students
| Measure | Central Islip Senior High School Central Islip, New York | Francis J O'neill School Central Islip, New York |
|---|---|---|
| Success Index (US) | 73 Top 25% | 34 Lower 50% |
| State rank | #572 of 1,079 | #1940 of 2,536 |
| National rank | #2681 of 16,910 | #36246 of 50,301 |
| Sector | Public | Public |
| Type | High | Elementary |
| Year range | Grades 9–12 | Grades K–6 |
| Students | 2,615 | 600 |
| Enrollment | 2,615 | 600 |
| Free/reduced-price lunch | 55.6% | 75.2% |
| Students per teacher | 17.0 | 14.0 |
| Reading proficiency | 89% | 31% |
| Math proficiency | 87% | 40% |
| city | Central Islip | Central Islip |
| state | New York | New York |
| Website | – | – |
The verdict
- •Central Islip Senior High School scores higher on the Success Index (US) (72.5 vs 33.5).
- •Central Islip Senior High School does better on math proficiency (87% vs 40%).
- •Central Islip Senior High School does better on reading proficiency (89% vs 31%).
- •Central Islip Senior High School does better on community advantage (fewer free/reduced-price lunch) (55.6% vs 75.2%).
- •Francis J O'neill School does better on students per teacher (14.0 vs 17.0).
- •Central Islip Senior High School is the larger school with 2,615 students compared with 600.
The Success Index (US) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
Free academic assessment
Torn between two schools? Start with your child.
Whichever you choose, a free Success Tutoring assessment shows exactly where your child is in English and Maths and how to get ahead before the next school year.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Frequently asked questions
Is Central Islip Senior High School better than Francis J O'neill School?
On the Success Index (US), Central Islip Senior High School ranks higher (72.5 vs 33.5 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Central Islip Senior High School and Francis J O'neill School?
About 1.4 km in a straight line, between Central Islip and Central Islip in New York.
Which has the better Enrollment?
Central Islip Senior High School: 2,615. Francis J O'neill School: 600. Students enrolled in the latest NCES directory year.
How do Central Islip Senior High School and Francis J O'neill School rank in New York?
Central Islip Senior High School is 572nd of 1,079 and Francis J O'neill School is 1940th of 2,536 among high schools in New York on the 2025 Success Index (US).