Beta You're viewing our redesigned school list. Prefer the classic layout?

Thousand Islands Central School District

At a glance

277^thof 874 New York districts▼ 57

Better than 68% of New York districts

Elementary 2 Middle 1 High 1Grades PK, KG-12

8483 County Rt 9
Clayton, NY 13624-1000·(315) 686-5594·All New York district rankings →

Statewide performance 2017–2025

2025: better than 68.3% of districts

Schools

799

Students

Top rankedThousand Islands High School188^th of 1,234 New York high schools

Compare New York districts →See the top-ranked New York schools →

Summary:

The Thousand Islands Central School District consists of 4 schools: 2 elementary schools (Guardino Elementary School and Bashaw Elementary School), 1 middle school (Thousand Islands Middle School), and 1 high school (Thousand Islands High School). The district serves the Thousand Islands region and is known for its strong academic performance, particularly at the high school level.

Thousand Islands High School consistently ranks among the top 15-20% of high schools in New York state, with a 4-star rating from SchoolDigger. The school has strong performance on Regents exams, with many subjects seeing over 80% proficiency rates, and a relatively high 4-year graduation rate of 84.3%. In contrast, Bashaw Elementary School has seen significant improvement, moving from a 3-star to a 4-star rating and outperforming the district and state averages on many state assessments, particularly in math.

The schools in the Thousand Islands Central School District generally perform above the state averages on both ELA and math assessments, with some standout performances. However, the district faces a challenge with a relatively high chronic absenteeism rate at Thousand Islands High School, which stands at 31.5%. The district also has a moderate level of economic disadvantage among its student population, with free/reduced lunch rates ranging from 36.88% to 43.23%.

Load more schools when map is moved

Ranking:

E Elementary M Middle H High A Alternative P Private

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 Geometry (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 Geometry End of Course	NY State Assessments English Language Arts 3rd Grade	NY State Assessments English Language Arts 4th Grade	NY State Assessments English Language Arts 5th Grade	NY State Assessments English Language Arts 6th Grade	NY State Assessments English Language Arts 7th Grade	NY State Assessments English Language Arts 8th Grade	NY State Assessments Math 3rd Grade	NY State Assessments Math 4th Grade	NY State Assessments Math 5th Grade	NY State Assessments Math 6th Grade	NY State Assessments Math 7th Grade	NY State Assessments Math 8th Grade	NY State Assessments Science 5th 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
Bashaw Elementary School	Public	PK, KG-5	410 S Esselstyne	Cape Vincent	13618	Jefferson County	Thousand Islands Central School District	No	No	No	Yes	(315) 654-2142	109	9	11.6	36.7%	102 (93.6%)	1 (0.9%)	5 (4.6%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	1 (0.9%)	74.6	567^th of 2445 public elementary schools	76.8%		74.1	554^th of 2445 public elementary schools	77.3%	13											60.0	93.3	50.0				66.7	100.0	71.4				69.2		99.1	100.0	100.0	100.0	100.0	99.1	100.0	100.0	$25,380	$2,392	$22,988
Guardino Elementary School	Public	PK, KG-5	600 High St	Clayton	13624	Jefferson County	Thousand Islands Central School District	No	No	No	Yes	(315) 686-5594	243	23	10.4	23.9%	233 (95.9%)	2 (0.8%)	2 (0.8%)	2 (0.8%)	0 (0.0%)	0 (0.0%)	4 (1.6%)	35.4	1607^th of 2445 public elementary schools	34.3%		45.2	1281^st of 2445 public elementary schools	47.6%	326											50.0	48.0	40.6				64.3	58.3	39.4				27.3		99.7	99.7	100.0	100.0	100.0	100.0	99.7	100.0	$23,475	$2,206	$21,269
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
Thousand Islands Middle School	Public	6-8	8487 County Rt 9	Clayton	13624	Jefferson County	Thousand Islands Central School District	No	No	No	Yes	(315) 686-5594	185	16	11.5	31.4%	173 (93.5%)	0 (0.0%)	4 (2.2%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	8 (4.3%)	76.9	294^th of 1500 public middle schools	80.4%		85.6	176^th of 1504 public middle schools	88.3%	118				100.0					100.0					66.7	54.0	73.3				54.1	71.4	68.1		74.5	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	$24,571	$1,084	$23,488

Districts nearby

District	Distance	# of Schools	Statewide Rank
Lyme Central School District	10.61 mi	1
Sackets Harbor Central School District	16.36 mi	1
General Brown Central School District	16.58 mi	3	366^th
La Fargeville Central School District	18.75 mi	1
Jefferson-Lewis-Hamilton-Herkimer-Oneida BOCES	20.87 mi	1

See the top NY New York districts

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.