FRANCIS J O'NEILL SCHOOL

FRANCIS J O'NEILL SCHOOL is a medium-sized K-5 school in CENTRAL ISLIP, New York, run under CENTRAL ISLIP UNION FREE SCHOOL DISTRICT. The school caters to 600 students in grades K through 6. Compared to the state average of about 443 students per school, that is 35% bigger than typical.

FRANCIS J O'NEILL SCHOOL is one of 8 schools operated by CENTRAL ISLIP UNION FREE SCHOOL DISTRICT, a district that teaches 7,773 students overall.

On the student-mix side, FRANCIS J O'NEILL SCHOOL shows that 74% of the student body identifies as Hispanic; the rest breaks down as 19% Black, 3% multiracial, 2% White. That is noticeably more Hispanic than the county at large, where the share is closer to 23%.

Looking at the economic backdrop, Staff filings list 44 full-time-equivalent teachers, which works out to roughly 13.7:1 students per teacher. That figure is higher than the state norm's 12.8:1 average. An estimated 75% of students are eligible for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. By comparison, Suffolk County runs at roughly 39%, so the school's eligibility rate is above the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), FRANCIS J O'NEILL SCHOOL sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 47.4%; this one delivers 36.8%.

Across the wider county, ACS estimates for Suffolk County put median household earnings sit near $130,686, 40% of adults hold a bachelor's degree or higher, and the poverty rate sits near 4%. Across Suffolk County's 343 public schools (combined enrollment of about 222,439 students), FRANCIS J O'NEILL SCHOOL is one campus in the mix.

SOUTH SHORE CHARTER SCHOOL is the nearest neighboring public school, about 0.3 miles from this campus. Within five miles, there are 8 other public schools. On composite proficiency, FRANCIS J O'NEILL SCHOOL comes 2nd of 8 in the immediate cluster, higher than the nearby-schools average of 33.5%.

The campus sits in a residential setting.

Looking at the recent track record. Looking back 7 years, enrollment at FRANCIS J O'NEILL SCHOOL has contracted 21%, going from 764 students in 2018 to 600 in 2025. The student-to-teacher ratio narrowed from 15.3:1 in 2018 to 13.7:1 today.

Within the allk12 community for this school, the page collects discussion, questions, and updates around school events, parent volunteer needs, and clubs. Members of the school community can share what they know.