Public schools in Central Islip, NY
8 open public schools with an address in Central Islip, operated by 2 education agencies. Compare size, staffing, grade spans, and school type, then confirm assignment with the district.
Public schools
8
NCES preliminary directory 2025–26
Reported students
7,220
8 schools reporting · NCES 2024–25
Median student–teacher ratio
13.7:1
New York median 11.1:1
Charter schools
1
0 virtual
An overview of Central Islip public schools
The federal directory lists 8 public schools in Central Islip, NY: 6 elementary, 1 middle, 1 high. The 8 schools that reported 2024–25 membership enrolled 7,220 students, an average of 903 per school. The largest campus is Central Islip Senior High School (2,615 students), and the largest elementary school is Charles a Mulligan Elementary School (997).
Central Islip Union Free School District operates the most schools here (7), plus 1 charter, service, or other agency. City names come from school mailing addresses, which often differ from district or municipal boundaries.
Across schools that reported staffing, the median student–teacher ratio is 13.7:1, higher than the statewide school median of 11.1:1. A ratio counts classroom-teacher FTE against total enrollment, so specialized programs and part-time staffing can move it; ask schools for actual class sizes by grade.
School choice options include 1 charter school. Application windows and lotteries usually open months before the school year.
About 61% of students in reporting schools were eligible for free or reduced-price meals in 2024–25. This describes the community served; it is not a quality signal, and community-eligibility schools can report differently.
School districts and agencies serving Central Islip
Elementary schools in Central Islip
6| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| Anthony Alfano Elementary School Central Islip Union Free School District | PK–06 | 491 | 12:1 | |
| Charles a Mulligan Elementary School Central Islip Union Free School District | KG–06 | 997 | 14.9:1 | |
| Cordello Avenue Elementary School Central Islip Union Free School District | KG–06 | 490 | 11:1 | |
| Francis J O'Neill School Central Islip Union Free School District | KG–06 | 600 | 13.7:1 | |
| Marguerite L Mulvey School Central Islip Union Free School District | KG–06 | 567 | 12.7:1 | |
| South Shore Charter School South Shore Charter School · Charter | KG–03 | 268 | — |
Middle schools in Central Islip
1| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| Ralph Reed School Central Islip Union Free School District | 07–08 | 1,192 | 13.8:1 |
High schools in Central Islip
1| School | Grades | Students | Ratio | Compare |
|---|---|---|---|---|
| Central Islip Senior High School Central Islip Union Free School District | 09–12 | 2,615 | 16.9:1 |
Student demographics
Race and ethnicity share of reported enrollment
- White1.8%
- Hispanic80.2%
- Black14.3%
- Asian1.3%
- American Indian / Alaska Native0.2%
- Native Hawaiian / Pacific Islander0.1%
- Multiracial2%
Enrollment-weighted across 8 Central Islip schools with NCES CCD 2024–25 race/ethnicity counts (7,220 students). Privacy suppression can leave small gaps.
Questions about public schools in Central Islip
How many public schools are in Central Islip, NY?
The current NCES directory lists 8 open public schools with a location address in Central Islip: 6 elementary, 1 middle, 1 high. Together they reported 7,220 students in 2024–25. The count includes charter, alternative, and special-purpose public schools; it excludes private schools.
Which school districts serve Central Islip?
Schools with an address in Central Islip belong to 2 education agencies, led by Central Islip Union Free School District (7 schools), South Shore Charter School (1 school). A mailing city is not an attendance boundary; confirm the district for a specific address.
What is the largest public high school in Central Islip?
Central Islip Senior High School reported the largest high-school enrollment in Central Islip, with 2,615 students in 2024–25 (grades 09–12). Size is a description of the campus, not a quality measure.
Are there charter schools in Central Islip?
Yes. 1 of the 8 public schools in Central Islip are identified as charter schools in the NCES directory, including South Shore Charter School. Charter schools are public and tuition-free, but admission usually uses an application or lottery.
What is the typical student–teacher ratio in Central Islip schools?
The median reported student–teacher ratio across Central Islip public schools is 13.7:1, higher than the New York school median of 11.1:1. The ratio divides enrollment by classroom-teacher FTE; it is not an average class size.
Does living in Central Islip guarantee a seat at a specific school?
No. Assignment depends on the district's attendance boundaries, programs, and enrollment rules, which can split a city or cross city lines. Use the district profile and its official boundary or school-locator tool to confirm the assigned school for an exact address.
Nearby New York cities
Sources: NCES Common Core of Data 2025–26 preliminary directory (schools, grades, addresses, charter status) and 2024–25 nonfiscal files (enrollment, teachers, race/ethnicity, meal eligibility); Civil Rights Data Collection 2021–22 (AP and computer science). Cities are grouped by school mailing address. Methodology · All New York cities