Thousand Islands Middle School
Public · Grades 6–8 · 185 students
Thousand Islands High School
8481 County Rt 9, Clayton, NY 13624
Grades
9–12
High
Students
262
Enrolled 2024–25
Students per teacher
12.7 : 1
Full-time teachers
District
Thousand Islands Central School District
Jefferson County
Schola Grade B · Above average
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 Thousand Islands High School
Thousand Islands High School is a public high school in Clayton, New York, serving grades 9–12. It is part of Thousand Islands Central School District. The school is located in a rural area in Jefferson County.
In the 2024–25 school year, 262 students were enrolled, with about 12.7 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 B (above average), 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)
- 262 students
- Students per teacher
- 12.7 to 1
- AP courses offered
- 2
- Charter school
- No
- Magnet school
- No
- Locale
- Rural — Distant
- School district
- Thousand Islands Central School District
- County
- Jefferson County
- NCES school ID
- 360765000548
Schools near Thousand Islands High School
All 3 schools in Clayton →
Guardino Elementary School
Public · Grades Pre-K–5 · 243 students
Bashaw Elementary School
Public · Grades Pre-K–5 · 109 students
General Brown Junior-Senior High School
Public · Grades 7–12 · 675 students
Alexandria Central High School
Public · Grades 7–12 · 224 students
Watertown Senior High School
Public · Grades 9–12 · 1,181 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.