Below Average
#4165 of 4,739 schools in NY
Thousand Islands High School
High School · THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT
PO BOX 1000, Clayton, NY 13624
Enrollment
253
Student-Teacher
13.3:1
Score
4.5
Grades
9th – 12th
Enrollment
253
Student-Teacher
13.3:1
Score
4.5
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Clayton
#4 of 4
public schools
New York high schools
#1,091 of 1,160
In district
#4 of 4
THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT
Academic performance
8.7 / 10
Exceptional
About Thousand Islands High School
THOUSAND ISLANDS HIGH SCHOOL is a regular public high school located in the rural community of Clayton, New York. The school serves students from ninth through twelfth grade and has an enrollment of 253 students with a student-teacher ratio of 13.3:1, ensuring that each student receives individual attention. With 19 full-time equivalent teachers, THOUSAND ISLANDS HIGH SCHOOL offers a supportive learning environment.
The school’s academic performance is noteworthy, with 81% of students proficient or above in ELA/Reading and an impressive 92% proficient or above in Math. According to MySchoolScout's rating system, the school scores a 6.8 out of 10 overall, placing it at the 70th percentile among New York’s schools with a strong academic score of 8.4 out of 10. This indicates that while there is room for improvement in certain areas, THOUSAND ISLANDS HIGH SCHOOL excels in math and provides a solid foundation for student development.
THOUSAND ISLANDS HIGH SCHOOL stands out as an integral part of the rural community, offering students a nurturing environment conducive to learning and personal growth.
What Parents Should Know
Located in a rural area, Thousand Islands High School may involve longer commutes for some families. Rural schools often serve as community anchors and may have smaller class sizes, but parents should consider transportation logistics, after-school program availability, and access to specialized services.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
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Thousand Islands High School — Students at Thousand Islands High School score 81% proficient, which is above what's typical for similar communities (expected: 62%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
41.1%
Students qualifying for federal meal assistance
Test Scores NY EDFACTS (2020-21)
Based on 4 test records from NY state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 3.7/10.
How Thousand Islands High School Compares
See how Thousand Islands High School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has remained stable from 92% (2019) to 92% (2021). Reading/ELA proficiency has declined from 92% (2019) to 69.5% (2021).
Location
PO BOX 1000, Clayton, NY 13624
Nearby Alternatives
Families considering Thousand Islands High School may also want to explore other high schools in the area. IMMACULATE HEART CENTRAL JR/SR HIGH SCHOOL (rated 6.0/10, 20.9 miles away, in nearby Watertown), which scores notably higher. Another option is ALEXANDRIA CENTRAL HIGH SCHOOL (rated 4.5/10, 17.5 miles away, in nearby Alexandria Bay), with a very similar rating. Additionally, GENERAL BROWN JUNIOR-SENIOR HIGH SCHOOL (rated 2.7/10, 15.2 miles away, in nearby Dexter), a more accessible option. For more schools in Clayton, see our Clayton schools guide .
Nearby Schools
20 within 21.6 miNeighborhood Census ACS (2019-2023)
Census data for ZIP 13624 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$79,167
Median Home Value
$224,000
Median Rent
$982/mo
Population
4,438
College Educated
31.4%
Homeownership
65.8%
Avg Commute
27.6 min
Poverty Rate
11.5%
Median Age
46
Community Profile
The community surrounding Thousand Islands High School has a median household income of $79,167. It is an area where 31% of adults hold a bachelor's degree or higher. The median home value in the area is $224,000, with a median rent of $982/month. The area has a poverty rate of 11.5%. The average commute for residents is 28 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| ALEXANDRIA CENTRAL HIGH SCHOOL Alexandria Bay, NY | 4.5 |
| CONGREGATION PEER BAIS YAAKOV Monsey, NY | 4.5 |
| MAPLE GROVE JUNIOR/SENIOR HIGH SCHOOL Bemus Point, NY | 4.5 |
| ONTECH CHARTER HIGH SCHOOL Syracuse, NY | 4.5 |
| PORT BYRON SENIOR HIGH SCHOOL Port Byron, NY | 4.5 |
| YOUNG WOMEN'S COLLEGE PREP CS Rochester, NY | 4.5 |
Frequently Asked Questions
Common questions about Thousand Islands High School
What grades does Thousand Islands High School serve?
Thousand Islands High School serves students in grades 9th through 12th.
How many students attend Thousand Islands High School?
Thousand Islands High School has an enrollment of approximately 253 students.
What is the student-teacher ratio at Thousand Islands High School?
The student-teacher ratio at Thousand Islands High School is 13.3:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Thousand Islands High School rank in NY?
Thousand Islands High School is ranked #4165 out of 4,739 schools in NY.
What is Thousand Islands High School's MySchoolScout rating?
Thousand Islands High School has a composite rating of 4.5 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Thousand Islands High School?
Based on the most recent state assessment data, Thousand Islands High School has 92.0% math proficiency and 80.8% reading/ELA proficiency.
Is Thousand Islands High School a charter school?
No, Thousand Islands High School is not a charter school. It is a traditional public school operated by the local school district.
Is Thousand Islands High School a Title I school?
No, Thousand Islands High School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Thousand Islands High School?
41.1% of students at Thousand Islands High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
- County Safety
- Low (128/100K)
FBI UCR 2024. County-level only. Data >1 year old.
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 253
- Student-Teacher Ratio
- 13.3:1
- Teachers (FTE)
- 19
- Free/Reduced Lunch
- 41.1%
- Type
- regular
- Setting
- Distant Rural
- County
- Jefferson County
- Phone
- (315) 686-5594
- Data Year
- 2023–2024
Resources & Links
District
THOUSAND ISLANDS CENTRAL SCHOOL DISTRICT- District Enrollment
- 841
- Schools in District
- 4
- Per-Pupil Spending
- $23,443
- District Rank
- #4 of 4
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
- Best Public Schools in New York 2026: Top Districts from NYC to the Suburbsbest schools
- Best Schools in New York, NY — 2026 Rankingsbest schools
- Best States for Public Schools in 2026: A Complete Rankingdata insights
- Charter Schools vs Public Schools: What the Data Actually Shows (2026)school choice
- Student-Teacher Ratio by State: Complete 2026 Rankingsdata insights
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