Serving 262 students in grades 9-12, Thousand Islands High School ranks in the top 10% of all schools in New York for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is ≥80% (which is higher than the New York state average of 52%). The percentage of students achieving proficiency in reading/language arts is ≥80% (which is higher than the New York state average of 49%).
The student-teacher ratio of 12:1 is higher than the New York state level of 11:1.
Minority enrollment is 10% of the student body (majority Hispanic), which is lower than the New York state average of 61% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 262 students
- Student-Teacher Ratio: 12:1
- Minority Enrollment: 10%
- Graduation Rate: 90-94% (Top 50% in NY)
- Overall Testing Rank: Top 10%
- Math Proficiency: ≥80% (Top 20%)
- Reading Proficiency: ≥80% (Top 10%)
- Science Proficiency: 90-94% (Top 20%)
- Source: National Center for Education Statistics (NCES), NY Dept. of Education
Top Rankings
Thousand Islands High School ranks among the top 20% of public schools in New York for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Community Size
School Overview
Thousand Islands High School's student population of 262 students has grown by 7% over five school years.
The teacher population of 21 teachers has declined by 16% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
262 students
Total Classroom Teachers
21 teachers
School Motto
The Mission of the Thousand Islands Central School District is to ensure that all students think critically, communicate, create, and collaborate to become productive members of society.
School Rankings
Thousand Islands High School ranks within the top 10% of all 4,346 schools in New York (based off of combined math and reading proficiency testing data).
The diversity score of Thousand Islands High School is 0.19, which is less than the diversity score at state average of 0.73. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#339 out of 4346 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
≥80%
52%
Reading/Language Arts Test Scores (% Proficient)
≥80%
49%
Science Test Scores (% Proficient)
90-94%
78%
Student-Teacher Ratio
12:1
11:1
American Indian
n/a
1%
Asian
1%
10%
Hispanic
5%
31%
Black
n/a
15%
White
90%
39%
Hawaiian
n/a
n/a
Two or more races
4%
4%
All Ethnic Groups
Graduation Rate
90-94%
87%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
36%
55%
Eligible for Reduced Lunch
2%
2%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), NY Dept. of Education
Frequently Asked Questions
What is Thousand Islands High School's ranking?
Thousand Islands High School is ranked #339 out of 4,346 schools, which ranks it among the top 10% of public schools in New York.
What schools are Thousand Islands High School often compared to?
Thousand Islands High Schoolis often viewed alongside schools like Alexandria Central High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
≥80% of students have achieved math proficiency (compared to the 52% NY state average), while ≥80% of students have achieved reading proficiency (compared to the 49% NY state average).
What is the graduation rate of Thousand Islands High School?
The graduation rate of Thousand Islands High School is 90-94%, which is higher than the New York state average of 87%.
How many students attend Thousand Islands High School?
262 students attend Thousand Islands High School.
What is the racial composition of the student body?
90% of Thousand Islands High School students are White, 5% of students are Hispanic, 4% of students are Two or more races, and 1% of students are Asian.
What is the student-teacher ratio of Thousand Islands High School?
Thousand Islands High School has a student ration of 12:1, which is higher than the New York state average of 11:1.
What grades does Thousand Islands High School offer ?
Thousand Islands High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Thousand Islands High School part of?
Thousand Islands High School is part of Thousand Islands Central School District.
School Calendar
View the Thousand Islands High School yearly calendar below. Note key dates such as:
Event
Date
Last Day for Grades 7-12
June 16, 2026 (Tuesday)
Last Day of School for BES & GES - Early Dismissal @ 11:30am
June 25, 2026 (Thursday)
Last Day of School for Grade 6 - Early Dismissal @ 11:00am
June 25, 2026 (Thursday)
School Reviews
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