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Clarkstown South Senior High School

31 Demarest Mill Rd, West Nyack, NY 10994

ASchola Grade
Directions Call
Grades
9–12
High
Students
1,386
Enrolled 2024–25
Students per teacher
12.1 : 1
Full-time teachers
District
Clarkstown Central School District
Rockland County

Schola Grade A · Excellent

Letter grade (A–F) · compared with 1,093 New York high schools · How we grade
Test scores97% proficient in math & reading
96thpercentile
Equity95% of low-income students proficient
97thpercentile
Attendance18% chronically absent
84thpercentile
Graduation rate97% graduate in 4 years
76thpercentile
College readinessAt least 29% take AP, IB or dual-enrollment courses
59thpercentile
Class size12.1 students per teacher
31stpercentile

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 Clarkstown South Senior High School

Clarkstown South Senior High School is a public high school in West Nyack, New York, serving grades 9–12. It is part of Clarkstown Central School District. The school is located in a large suburb in Rockland County.

In the 2024–25 school year, 1,386 students were enrolled, with about 12.1 students for every full-time teacher. That ratio is larger than 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

31 Demarest Mill Rd
West Nyack, NY 10994
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,386 students
Students per teacher
12.1 to 1
AP courses offered
31
Charter school
No
Magnet school
No
Locale
Suburb — Large
School district
Clarkstown Central School District
County
Rockland County
NCES school ID
362034001865

Schools near Clarkstown South Senior High School

All 9 schools in West Nyack →

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.