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Public School Review - Established 2003

Best St. Lawrence County Public High Schools (2026)

For the 2026 school year, there are 19 public high schools serving 6,742 students in St. Lawrence County, NY.
The top-ranked public high schools in St. Lawrence County, NY are Potsdam Senior High School, H C Williams Senior High School and Saint Lawrence High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
St. Lawrence County, NY public high schools have an average math proficiency score of 52% (versus the New York public high school average of 55%), and reading proficiency score of 52% (versus the 59% statewide average). High schools in St. Lawrence County have an average ranking of 3/10, which is in the bottom 50% of New York public high schools.
St. Lawrence County, NY public high school have a Graduation Rate of 85%, which is less than the New York average of 89%.
The school with highest graduation rate is H C Williams Senior High School, with 90-94% graduation rate. Read more about public school graduation rate statistics in New York or national school graduation rate statistics.
Minority enrollment is 6% of the student body (majority American Indian and Hispanic), which is less than the New York public high school average of 62% (majority Hispanic).

Best Public High Schools in St. Lawrence County (2026)

School
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Potsdam Senior High School
(Math: 90-94% | Reading: 90-94% )
Rank:
10/
10
Top 5%
29 Leroy St
Potsdam, NY 13676
(315) 265-2000
Gr: 9-12 | 373 students Student-teacher ratio: 11:1 Minority enrollment: 11%
Rank: #22.
H C Williams Senior High School
(Math: ≥90% | Reading: ≥80%)
Rank:
10/
10
Top 5%
99 State St
Canton, NY 13617
(315) 386-8561
Gr: 9-12 | 332 students Student-teacher ratio: 10:1 Minority enrollment: 7%
Rank: #33.
Saint Lawrence High School
(Math: 80-89% | Reading: ≥80%)
Rank:
10/
10
Top 10%
1039 State Hwy 11c
Brasher Falls, NY 13613
(315) 389-5131
Gr: 9-12 | 276 students Student-teacher ratio: 11:1 Minority enrollment: 9%
Rank: #44.
Gouverneur High School
(Math: 60-79% | Reading: 80-84%)
Rank:
9/
10
Top 20%
113 E Barney St
Gouverneur, NY 13642
(315) 287-1900
Gr: 9-12 | 450 students Student-teacher ratio: 12:1 Minority enrollment: 3%
Rank: #55.
Norwood-norfolk School
(Math: 60-69% | Reading: ≥80%)
Rank:
9/
10
Top 20%
7852 State Hwy 56
Norwood, NY 13668
(315) 353-6631
Gr: 9-12 | 290 students Student-teacher ratio: 9:1 Minority enrollment: 4%
Rank: #66.
Colton-pierrepont Central School
(Math: 70-74% | Reading: 60-64%)
Rank:
9/
10
Top 20%
4921 State Hwy 56
Colton, NY 13625
(315) 262-2100
Gr: PK-12 | 359 students Student-teacher ratio: 10:1 Minority enrollment: 2%
Rank: #77.
Massena Senior High School
(Math: 45-49% | Reading: 60-79%)
Rank:
7/
10
Top 50%
84 Nightengale Ave
Massena, NY 13662
(315) 764-3710
Gr: 9-12 | 743 students Student-teacher ratio: 14:1 Minority enrollment: 21%
Rank: #88.
Parishville-hopkinton Junior-senior High School
(Math: 40-49% | Reading: 60-69%)
Rank:
6/
10
Top 50%
12 County Rt 47
Parishville, NY 13672
(315) 265-4642
Gr: 7-12 | 159 students Student-teacher ratio: 8:1 Minority enrollment: 1%
Rank: #99.
Ogdensburg Free Academy
(Math: 48% | Reading: 57%)
Rank:
6/
10
Top 50%
1100 State St
Ogdensburg, NY 13669
(315) 393-0900
Gr: 7-12 | 646 students Student-teacher ratio: 10:1 Minority enrollment: 2%
Rank: #1010.
Madrid-waddington Junior-senior High School
(Math: 55-59% | Reading: 45-49%)
Rank:
6/
10
Top 50%
2582 State Hwy 345
Madrid, NY 13660
(315) 322-5746
Gr: 6-12 | 309 students Student-teacher ratio: 11:1 Minority enrollment: 6%
Rank: #1111.
Heuvelton Central School
(Math: 47% | Reading: 51%)
Rank:
6/
10
Top 50%
87 Washington St
Heuvelton, NY 13654
(315) 344-2414
Gr: PK-12 | 510 students Student-teacher ratio: 11:1 Minority enrollment: 2%
Rank: #1212.
Morristown Central School
(Math: 40-44% | Reading: 50-54%)
Rank:
5/
10
Bottom 50%
408 Gouverneur St
Morristown, NY 13664
(315) 375-8814
Gr: PK-12 | 307 students Student-teacher ratio: 10:1 Minority enrollment: 2%
Rank: #1313.
Lisbon Central School
(Math: 50% | Reading: 44%)
Rank:
5/
10
Bottom 50%
6866 County Rt 10
Lisbon, NY 13658
(315) 393-4951
Gr: PK-12 | 540 students Student-teacher ratio: 11:1 Minority enrollment: 3%
Rank: #1414.
Hammond Central School
(Math: 40-44% | Reading: 40-44%)
Rank:
4/
10
Bottom 50%
51 S Main St
Hammond, NY 13646
(315) 324-5931
Gr: PK-12 | 225 students Student-teacher ratio: 8:1 Minority enrollment: 3%
Rank: #1515.
Clifton-fine Junior-senior High School
(Math: 20-29% | Reading: 50-59%)
Rank:
4/
10
Bottom 50%
11 Hall Ave
Star Lake, NY 13690
(315) 848-3333
Gr: 6-12 | 112 students Student-teacher ratio: 5:1 Minority enrollment: 11%
Rank: #1616.
Hermon-dekalb Central School
(Math: 40-44% | Reading: 35-39%)
Rank:
4/
10
Bottom 50%
709 E Dekalb Rd
De Kalb Junction, NY 13630
(315) 347-3442
Gr: PK-12 | 363 students Student-teacher ratio: 10:1 Minority enrollment: 5%
Rank: #1717.
Edwards-knox Junior-senior High School
(Math: 45-49% | Reading: 25-29%)
Rank:
3/
10
Bottom 50%
2512 County Route 24
Hermon, NY 13652
(315) 562-8131
Gr: 7-12 | 205 students Student-teacher ratio: 9:1 Minority enrollment: 3%
Rank: n/an/a
Saint Lawrence Psychiatric Center Children & Youth Services
Special Education School
1 Chimney Point Dr
Ogdensburg, NY 13669
(315) 541-2565
Gr: 6-12 | 20 students Minority enrollment: 4%
Rank: n/an/a
Saint Lawrence-lewis Boces
Special Education School
40 W Main St
Canton, NY 13617
(315) 386-4504
Gr: K-12 | 225 students Student-teacher ratio: 3:1 Minority enrollment: 6%

Frequently Asked Questions

What are the top-ranked public high schools in St. Lawrence County, NY?
The top-ranked public high schools in St. Lawrence County, NY include Potsdam Senior High School, H C Williams Senior High School and Saint Lawrence High School.
How many public high schools are located in St. Lawrence County?
19 public high schools are located in St. Lawrence County.
What is the racial composition of students in St. Lawrence County?
St. Lawrence County public high schools minority enrollment is 6% of the student body (majority American Indian and Hispanic), which is less than the New York public high schools average of 62% (majority Hispanic).
Which public high schools in St. Lawrence County are often viewed compared to one another?

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