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Best Public Schools in Clayton, NY

At a glance

Schools

690

Students

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

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Summary:

The city of Clayton, New York is home to three schools that serve students from elementary through high school: Guardino Elementary School, Thousand Islands High School, and Thousand Islands Middle School. These schools are part of the Thousand Islands Central School District.

Among the three schools, Thousand Islands High School stands out as the top performer, consistently ranking among the top 20% of high schools in New York state. The school boasts impressive test scores, with the majority of students scoring proficient or better on Regents exams across various subjects. Additionally, the school maintains a relatively high 4-year graduation rate of 84.3% and a low dropout rate of 4.5%. In contrast, Guardino Elementary School has struggled, ranking in the bottom 35% of elementary schools in the state, with lower proficiency rates in English Language Arts and science compared to the district and state averages.

The district as a whole has a relatively high percentage of students receiving free or reduced-price lunch, ranging from 36.88% to 43.23% across the three schools. This suggests the district may serve a population with significant economic challenges, which could impact student performance and resource needs. However, the similar per-student spending and low student-teacher ratios across the schools indicate that the district is allocating resources fairly evenly, suggesting that factors beyond just funding and staffing may be at play in the disparities in academic performance.

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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
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

Cities Near Clayton

City	Distance	# of Schools	Statewide Rank
La Fargeville	6.5 mi	1
Alexandria Bay	10.75 mi	2	285^th
Chaumont	12.26 mi	1
Theresa	14.51 mi	1
Cape Vincent	14.72 mi	1	146^th

See the top NY New York cities

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.