Miller Place High School
Public · Grades 9–12 · 764 students
Robert M Grable Jr Mount Sinai High School
110 N Country Rd, Mount Sinai, NY 11766
Grades
9–12
High
Students
710
Enrolled 2024–25
Students per teacher
10.9 : 1
Full-time teachers
District
Mount Sinai Union Free School District
Suffolk County
Schola Grade A · Excellent
Letter grade (A–F) · compared with 1,093 New York high schools · How we grade
Percentiles compare this school with other New York high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Robert M Grable Jr Mount Sinai High School
Robert M Grable Jr Mount Sinai High School is a public high school in Mount Sinai, New York, serving grades 9–12. It is part of Mount Sinai Union Free School District. The school is located in a large suburb in Suffolk County.
In the 2024–25 school year, 710 students were enrolled, with about 10.9 students for every full-time teacher. That ratio is close to the typical New York high school (10.7 students per teacher). Its Schola Grade is A (excellent), compared with 1,093 New York high schools.
Grades & enrollment
Students per grade, 2024–25Grades 9–12
Location & nearby schools
School details
- Type
- Public School · What this means
- Level
- High
- Grades offered
- 9–12
- Enrollment (2024–25)
- 710 students
- Students per teacher
- 10.9 to 1
- AP courses offered
- 20
- Charter school
- No
- Magnet school
- No
- Locale
- Suburb — Large
- School district
- Mount Sinai Union Free School District
- County
- Suffolk County
- NCES school ID
- 362004004827
Schools near Robert M Grable Jr Mount Sinai High School
All 3 schools in Mount Sinai →
Comsewogue High School
Public · Grades 9–12 · 1,160 students
Earl L Vandermeulen High School
Public · Grades 9–12 · 313 students
Ward Melville Senior High School
Public · Grades 9–12 · 1,442 students
Newfield High School
Public · Grades 9–12 · 1,553 students
Centereach High School
Public · Grades 8–12 · 1,467 students
School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.