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Thousand Islands High School

Q: Is Thousand Islands High School a good school?

Thousand Islands High School ranks 188 th of 1234 New York high schools. SchoolDigger rates this school 4 stars out of 5.

Public Grades 9-12

188^th

SchoolDigger Rank ?

of 1,234 New York High Schools

Better than 85% of New York high schools

Summary

Thousand Islands High School is a public high school serving grades 9-12 in Clayton, New York, part of the Thousand Islands Central School District. The school has consistently performed well, ranking in the top 15-20% of New York high schools over the past several years and earning a 4-star rating from SchoolDigger in the 2024-2025 school year.

Thousand Islands High School stands out for its strong academic performance, with students consistently outperforming the state average on Regents exams across a wide range of subjects. The school's proficiency rates are often 10-20 percentage points higher than the state average, and it has maintained a high 4-year graduation rate and low dropout rate. Additionally, the school has demonstrated strong performance across various student subgroups, indicating that it is effectively serving a diverse student population.

Compared to the nearby Alexandria Central High School and General Brown Junior-Senior High School, Thousand Islands High School outperforms them in academic performance, graduation and dropout rates, and resource allocation, such as spending per student and student-to-teacher ratio. These factors contribute to the school's strong educational outcomes and its ability to serve its diverse student population effectively.

262

Students ?

12.6

Student/teacher ratio ?

$23,679

Per pupil spending ?

37.8%

Free/discounted lunch ?

8481 County Rt 9
Clayton, NY 13624-1000

(315) 686-5594

District: Thousand Islands Central School District

Feeder schools for Thousand Islands High School:

Elementary:	Bashaw Elementary School
	Guardino Elementary School
Middle:	Thousand Islands Middle School

Racial breakdown:

White:

90.1%

Hispanic:

4.6%

Two or more races:

4.2%

See top rated New York high schools

Compare Thousand Islands High School to nearby high schools!

At a glance

▬ Ranking trend: Holding steady — 84th percentile in 2014 → 85th in 2025

Strengths

✓Test scores above the New York average (87% vs 67% meeting standards)

✓Ranks in the top 15% of New York high schools

✓91% graduate in 4 years — above the New York average (83%)

Worth a look

!Dropout rate above the New York average (9% vs 5%)

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school87%

District avg88%

New York avg67%

188^th of 1,234

New York public high schools ?

Top 15%▲ up 1 pts since 2015

See the entire ranking list of New York High Schools →

★★★★★

SchoolDigger rating ?

277^th of 874Thousand Islands Central School District among New York districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	New York percentile	Rating
2025	77.7	188 of 1234	84.8%	★★★★☆
2024	77.6	178 of 1242	85.7%	★★★★☆
2023	79.2	135 of 1228	89.0%	★★★★☆
2022	77.1	166 of 1190	86.1%	★★★★☆
2019	69.4	350 of 1207	71.0%	★★★★☆
2018	71.6	283 of 1210	76.6%	★★★★☆
2017	72.9	225 of 1221	81.6%	★★★★☆
2016	68.8	256 of 1255	79.6%	★★★★☆
2015	71.4	200 of 1255	84.1%	★★★★☆
2014	72.5	193 of 1237	84.4%	★★★★☆
2013	76.4	164 of 1217	86.5%	★★★★☆
2012	74.8	195 of 1198	83.7%	★★★★☆
2011	78.4	64 of 1165	94.5%	★★★★★
2010	77.9	54 of 1117	95.2%	★★★★★
2009	76.2	78 of 1086	92.8%	★★★★★
2008	71.7	173 of 1027	83.2%	★★★★☆
2007	66.1	298 of 1002	70.3%	★★★★☆
2006	67.8	244 of 986	75.3%	★★★★☆
2005	69.0	198 of 935	78.8%	★★★★☆

Female

Year	Avg score	Statewide rank	New York percentile	Rating
2025	76.2	210 of 1206	82.6%	★★★★☆
2024	77.4	179 of 1219	85.3%	★★★★☆
2023	82.4	77 of 1197	93.6%	★★★★★
2022	81.1	87 of 1155	92.5%	★★★★★
2019	73.1	270 of 1193	77.4%	★★★★☆
2018	65.2	408 of 1176	65.3%	★★★☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	New York percentile	Rating
2025	68.3	235 of 1179	80.1%	★★★★☆
2024	71.4	197 of 1170	83.2%	★★★★☆
2023	75.7	126 of 1155	89.1%	★★★★☆
2022	71.9	158 of 1101	85.6%	★★★★☆
2019	64.0	342 of 1179	71.0%	★★★★☆
2018	69.5	207 of 1154	82.1%	★★★★☆

Male

Year	Avg score	Statewide rank	New York percentile	Rating
2025	77.1	183 of 1201	84.8%	★★★★☆
2024	76.0	206 of 1211	83.0%	★★★★☆
2023	74.6	227 of 1191	80.9%	★★★★☆
2022	69.2	305 of 1154	73.6%	★★★★☆
2019	61.4	485 of 1190	59.2%	★★★☆☆
2018	75.4	181 of 1176	84.6%	★★★★☆

Special Education

Year	Avg score	Statewide rank	New York percentile	Rating
2025	63.0	297 of 1149	74.2%	★★★★☆
2024	68.9	257 of 1144	77.5%	★★★★☆
2023	73.5	191 of 1130	83.1%	★★★★☆
2022	41.1	558 of 1038	46.2%	★★☆☆☆
2019	42.1	632 of 1132	44.2%	★★☆☆☆
2018	64.6	305 of 1095	72.1%	★★★★☆

White

Year	Avg score	Statewide rank	New York percentile	Rating
2025	61.7	276 of 788	65.0%	★★★☆☆
2024	63.9	244 of 781	68.8%	★★★☆☆
2023	63.9	220 of 776	71.6%	★★★★☆
2022	53.9	347 of 738	53.0%	★★★☆☆
2019	61.0	278 of 793	64.9%	★★★☆☆
2018	53.7	374 of 765	51.1%	★★★☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Male (2025)85th percentile~ school

Female (2025)83rd percentile~ school

Low Socio Economic Status (2025)80th percentile-5 vs school

Special Education (2025)74th percentile-11 vs school

White (2025)65th percentile-20 vs school

By subject vs New York (2024-2025) ?

Chemistry100%+35 vs state

Common Core Algebra II100%+25 vs state

Physics100%+31 vs state

Living Environment91%+35 vs state

Global History and Geography89%+13 vs state

Geometry88%+28 vs state

Algebra I85%+29 vs state

Earth Science81%+16 vs state

U.S. History and Government81%+6 vs state

Common Core English Language Arts79%+4 vs state

★

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Schools Near Thousand Islands High School

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Immunizations Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				Regents Chemistry (2025)	Regents Common Core Algebra II (2025)	Regents Common Core English Language Arts (2025)	Regents Earth Science (2025)	Regents Global History and Geography (2025)	Regents Living Environment (2025)	Regents Physics (2025)	Regents U.S. History and Government (2025)	Regents Algebra I (2025)	Regents Life Science Biology (2025)	Regents Geometry (2025)	Regents Earth and Space Sciences (2025)	NY State Assessments English Language Arts (2025)		NY State Assessments Math (2025)		NY State Assessments Science (2025)	% Completely Immunized (2020)	% Polio (2020)	% Measles (2020)	% Mumps (2020)	% Rubella (2020)	% Diphtheria (2020)	% Hepatitis B (2020)	% Varicella (2020)	Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	Regents Chemistry End of Course	Regents Common Core Algebra II End of Course	Regents Common Core English Language Arts End of Course	Regents Earth Science End of Course	Regents Global History and Geography End of Course	Regents Living Environment End of Course	Regents Physics End of Course	Regents U.S. History and Government End of Course	Regents Algebra I End of Course	Regents Life Science Biology End of Course	Regents Geometry End of Course	Regents Earth and Space Sciences End of Course	NY State Assessments English Language Arts 7th Grade	NY State Assessments English Language Arts 8th Grade	NY State Assessments Math 7th Grade	NY State Assessments Math 8th Grade	NY State Assessments Science 8th Grade	% Completely Immunized All Grades	% Polio All Grades	% Measles All Grades	% Mumps All Grades	% Rubella All Grades	% Diphtheria All Grades	% Hepatitis B All Grades	% Varicella All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Thousand Islands High School	Public	9-12	8481 County Rt 9	Clayton	13624	Jefferson County	Thousand Islands Central School District	No	No	No	No	(315) 686-5594	262	21	12.6	37.8%	236 (90.1%)	0 (0.0%)	12 (4.6%)	2 (0.8%)	1 (0.4%)	0 (0.0%)	11 (4.2%)	77.7	188^th of 1234 public high schools	84.8%		77.6	178^th of 1242 public high schools	85.7%	10	100.0	100.0	79.4	81.4	88.9	91.4	100.0	81.0	85.3		87.9							99.6	100.0	99.6	99.6	99.6	100.0	100.0	100.0	$23,679	$837	$22,842
General Brown Junior-Senior High School	Public	7-12	17643 Cemetery Rd	Dexter	13634	Jefferson County	General Brown Central School District	No	No	No	Yes	(315) 779-2300	675	46	14.6	41.3%	611 (90.5%)	12 (1.8%)	20 (3.0%)	10 (1.5%)	0 (0.0%)	2 (0.3%)	20 (3.0%)	76.9	199^th of 1234 public high schools	83.9%		71.9	312^th of 1242 public high schools	74.9%	113	87.2	98.3	90.6		87.7	44.0	90.9	94.3	76.6	72.2	72.2	88.7	42.6	53.7	53.7	70.1	46.5	99.8	100.0	100.0	100.0	100.0	100.0	100.0	99.8	$18,991	$1,001	$17,990
Alexandria Central High School	Public	7-12	34 Bolton Ave	Alexandria Bay	13607	Jefferson County	Alexandria Central School District	No	No	No	Yes	(315) 482-5113	224	24	9.4	42.0%	211 (94.2%)	2 (0.9%)	4 (1.8%)	0 (0.0%)	3 (1.3%)	1 (0.4%)	2 (0.9%)	72.2	285^th of 1234 public high schools	76.9%		75.2	235^th of 1242 public high schools	81.1%	50	69.2	100.0	86.1	95.0	89.2	93.3	100.0	92.9	72.5	46.4	61.1		74.3	38.7	71.9	33.3	60.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	$31,716	$620	$31,096

Frequently Asked Questions about Thousand Islands High School

What schools feed into Thousand Islands High School?

Thousand Islands High School is fed by the following schools:

Elementary : Bashaw Elementary School
Elementary : Guardino Elementary School
Middle : Thousand Islands Middle School

What is the racial makeup of Thousand Islands High School?

Students at Thousand Islands High School are 90% White, 5% Hispanic, 4% Two or more races.

What district is Thousand Islands High School in?

Thousand Islands Central School District

Is Thousand Islands High School a good school?

Thousand Islands High School ranks 188^th of 1234 New York high schools. SchoolDigger rates this school 4 stars out of 5.

How many students attend Thousand Islands High School?

In the 2024-25 school year, 262 students attended Thousand Islands High School.

Rate Thousand Islands High School!

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Schools in Clayton, NY

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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the WNYC and the New York State Department of Health and the NY State Education Department.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.