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The Stony Brook School Photo - The Stony Brook School, founded in 1922, is an independent college preparatory school (grades 7-12) that exists to challenge young men and women to know Jesus Christ as Lord, to love others as themselves, and to grow in knowledge and skill, in order that they may serve the world through their character and leadership. "Character Before Career"

Best Suffolk County ²ÝÁñÉçÇø High Schools (2026)

For the 2026 school year, there are 25 private high schools serving 6,469 students in Suffolk County, NY.
The top-ranked private high schools in Suffolk County, NY include St. Anthony's High School, St. John The Baptist Diocesan High School, and Ross School.
The average tuition cost is $27,758, which is higher than the New York private high school average tuition cost of $26,972.
38% of private high schools in Suffolk County, NY are religiously affiliated (most commonly Christian and Baptist).

Top-Ranked Suffolk County ²ÝÁñÉçÇø High Schools (2026)

School
Location
Quick Facts
The Knox School
The Knox School Photo - Founded in 1904, The Knox School is a premier boarding and day school located on 35 acres of waterfront property along the North Shore of Long Island.
(10)
541 Long Beach Road
Saint James, NY 11780
(631) 686-1600
Gr: 6-12 | 132 students Avg. class size: 12 students Sports: 9 | Extracurrculars: 39 Tuition & acceptance rate listed
Smithtown Christian School
Smithtown Christian School Photo
(Christian)
(8)
1 Higbie Dr
Smithtown, NY 11787
(631) 265-3334
Gr: PK-12 | 353 students Avg. class size: 18 students Sports: 6 | Extracurrculars: 16 Tuition & acceptance rate listed
Winston Preparatory School Long Island
Winston Preparatory School Long Island Photo
Special Education School
30 Deforest Road
Huntington Station, NY 11746
(631) 779-2400
Gr: 3-12 Tuition & acceptance rate listed
Crestwood Country Day School
Daycare / Preschool
313 Round Swamp Rd
Melville, NY 11747
(631) 692-6361
Gr: PK-12 | 346 students Tuition & acceptance rate listed
500 Montauk Highway
East Islip, NY 11769
(631) 869-1572
Gr: 6-12 Avg. class size: 8 students Sports: 11 Tuition & acceptance rate listed
Madonna Height School
All-girls | Alternative School
151 Burrs Ln
Huntington Station, NY 11746
(631) 213-0188
Gr: 7-12 | 44 students
Ross School
Ross School Photo - High School Building
18 Goodfriend Road
East Hampton, NY 11937
(631) 907-5268
Gr: PK-12 | 359 students Avg. class size: 11 students Sports: 18 | Extracurrculars: 22 Tuition & acceptance rate listed
St. Anthony's High School
(Catholic)
275 Wolf Hill Rd
Melville, NY 11747
(631) 271-2020
Gr: 9-12 | 2,305 students Tuition & acceptance rate listed
St. John The Baptist Diocesan High School
St. John The Baptist Diocesan High School Photo - SJB student produced Stained Glass in front lobby
(Catholic)
(3)
1170 Montauk Highway
West Islip, NY 11795
(631) 587-8000
Gr: 9-12 | 1,200 students Avg. class size: 28 students Sports: 28 | Extracurrculars: 2 Tuition & acceptance rate listed
The Stony Brook School
The Stony Brook School Photo - The Stony Brook School, founded in 1922, is an independent college preparatory school (grades 7-12) that exists to challenge young men and women to know Jesus Christ as Lord, to love others as themselves, and to grow in knowledge and skill, in order that they may serve the world through their character and leadership. "Character Before Career"
(Christian)
1 Chapman Parkway
Stony Brook, NY 11790
(631) 751-1800
Gr: 7-12 | 476 students Avg. class size: 13 students Sports: 16 | Extracurrculars: 22 Tuition & acceptance rate listed
Upper Room Christian School
Upper Room Christian School Photo - Several students are going to The School of Visual Arts after graduating this year.
(Christian)
(4)
722 Deer Park Rd
Huntington Station, NY 11746
(631) 242-5359
Gr: PK-12 | 212 students Avg. class size: 15 students Sports: 8 | Extracurrculars: 5 Tuition & acceptance rate listed
The Whole Child Academy
The Whole Child Academy Photo
Special Education School
(10)
175 Wolf Hill Road
Melville, NY 11747
(631) 423-2658
Gr: K-12 | 25 students Avg. class size: 1 student Sports: 2 | Extracurrculars: 2
Ascent School For Individuals With Autism
Special Education School
819 Grand Blvd Ste 2
Deer Park, NY 11729
(631) 254-6100
Gr: 5-12 | 19 students Avg. class size: 6 students
The Children's Center At Ucp
Special Education School
250 Marcus Blvd
Hauppauge, NY 11788
(631) 543-2338
Gr: K-12 | 51 students
Cleary School For The Deaf
Special Education School
301 Smithtown Blvd
Nesconset, NY 11767
(631) 831-5764
Gr: PK-12 | 66 students
Gersh Academy
Special Education School
21 Sweet Hollow Rd # 2
Huntington, NY 11743
(516) 986-9580
Gr: K-12 | 121 students
Gersh Academy- Inc
Special Education School
307 Eagle Ave
West Hempstead, NY 11552
(516) 986-9580
Gr: K-12 | 109 students
International Christian School
(Baptist)
1266 N Country Rd
Stony Brook, NY 11790
(631) 689-7660
Gr: K-12 Avg. class size: 15 students Tuition listed
Leonard E Burket Christian School
Leonard E Burket Christian School Photo
(Assembly of God)
34 Oak St
Center Moriches, NY 11934
(631) 878-1727
Gr: PK-12 | 117 students Avg. class size: 11 students
Long Island Baptist Academy
(Baptist)
696 Union Ave
Holtsville, NY 11742
(631) 447-2552
Gr: 2-12 | 7 students
Long Island School For The Gifted
Long Island School For The Gifted Photo - Is your child bored? At LISG, students are accelerated 1-3 years. Email admissions@lisg.org for information and visit lisg.org
Special Program Emphasis
165 Pidgeon Hill Rd Ste 1
Huntington Station, NY 11746
(631) 423-3557
Gr: K-9 | 105 students Avg. class size: 16 students Extracurrculars: 11
Our Savior New American School
Alternative School (Lutheran Church Missouri Synod)
(19)
140 Mark Tree Rd
Centereach, NY 11720
(631) 588-2757
Gr: PK-12 | 188 students Avg. class size: 10 students Sports: 6 | Extracurrculars: 6 Tuition listed
St. Pius V School
18 Old E Neck Rd
Melville, NY 11747
(631) 351-0116
Gr: 1-12 | 147 students
Sunshine Alternative Education Center
Alternative School
468 Boyle Rd
Port Jefferson Station, NY 11776
(631) 476-3099
Gr: 10-12 | 10 students
Victory Christian Academy
(Church of God)
1343 Montauk Hwy
Patchogue, NY 11772
(631) 654-9284
Gr: PK-12 | 65 students
[+] Show Closed ²ÝÁñÉçÇø Schools in Suffolk County, New York

Suffolk County ²ÝÁñÉçÇø Schools (Closed)

School
Location
Quick Facts
37 Rollstone Avenue
West Sayville, NY 11796
(631) 589-2180
Gr: K-12 | 50 students Avg. class size: 8 students Acceptance rate listed
211 Bay Shore Rd
Bay Shore, NY 11706
(631) 665-5241
Gr: PK-5 | 81 students Avg. class size: 10 students Acceptance rate listed
1225 Ostrander Ave
Riverhead, NY 11901
(631) 727-5900
Gr: 7-12 | 467 students
52 Hawthorne Ave
East Islip, NY 11730
(631) 581-4756
Gr: PK-1 | 61 students
74 Suffolk Lane
East Islip, NY 11730
(631) 581-1035
Gr: PK-12 | 63 students
2 Indian Head Rd
Commack, NY 11725
(631) 543-0202
Gr: PK-8 | 223 students
74 Hauppauge Rd
Commack, NY 11725
(631) 368-2600
Gr: K-8 | 70 students Avg. class size: 10 students Tuition & acceptance rate listed
Lake Grove School (Closed 2020)
Special Education School
Moriches Road
Lake Grove, NY 11755
(516) 585-8776
Gr: 8-12 | 60 students
821 Hawkins Ave
Lake Grove, NY 11755
(631) 585-0521
Gr: PK-8 | 26 students
180 Lawrence Rd
Kings Park, NY 11754
(631) 544-0830
Gr: K | 127 students
240 S Wellwood Ave
Lindenhurst, NY 11757
(631) 226-0208
Gr: PK-8 | 263 students
200 W Main St
Sayville, NY 11782
(631) 589-3426
Gr: PK-8 | 187 students
320 Broadway-greenlawn Rd.
Huntington, NY 11743
(631) 427-6300
Gr: PK-K | 64 students
500 W Montauk Hwy
Bay Shore, NY 11706
(631) 666-0908
Gr: PK-8 | 220 students
Trinity Regional School (Closed 2004)
Daycare / Preschool (Catholic)
1450 New York Ave
Huntington Station, NY 11745
(631) 549-7450
Gr: PK-K | 96 students
100 Landing Ave.
Smithtown, NY 11787
(631) 863-3040
Gr: PK-K | 163 students

Overview

This County (Suffolk County)
This State (NY)
# Schools
26 Schools

Student Body:

# Students
6,469 Students
231,285 Students
% Average Students of Color
38%
36%

Academics and Faculty:

# Teachers
704 Teachers
24,746 Teachers
Average Student-Teacher Ratio
9:1
9:1
% Average Faculty w/Advanced Degree
86%
76%
Average Class Size
13 students
15 students
Average Number of AP Courses
13 courses
12 courses
Average SAT score
1263
(Out of 1600)
1250
Average ACT score
28
(Out of 36)
28

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$27,758
$26,972
Average Summer Program Cost
$250
$3,417
Average % on Financial Aid
29%
35%
Average Financial Aid Grant
$9,522
$14,670
Average Acceptance Rate
67%
75%
Average Endowment Size
$10.57 million
$41.96 million

Students by Ethnicity:

0.63
0.49
# American Indian Students
5 Students
429 Students
% American Indian Students
n/a
n/a
# Asian Students
525 Students
11,847 Students
% Asian Students
8%
5%
# Hispanic Students
1,146 Students
15,693 Students
% Hispanic Students
17%
7%
# Black Students
773 Students
16,781 Students
% Black Students
11%
7%
# White Students
3,867 Students
161,908 Students
% White Students
57%
70%
# Hawaiian Students
1 Student
275 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
484 Students
24,065 Students
% of Others Students
7%
11%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
14 extracurriculars
18 extracurriculars
Average Number of Sports
12 sports
9 sports

Frequently Asked Questions

What are the top-ranked private high schools in Suffolk County, NY?
The top-ranked private high schools in Suffolk County, NY include St. Anthony's High School, St. John The Baptist Diocesan High School, and Ross School.
How many private high schools are located in Suffolk County?
25 private high schools are located in Suffolk County.
How much do private high schools cost in Suffolk County?
The average tuition cost is $27,758, which is higher than the New York private school average tuition cost of $26,972.
How diverse are private high schools in Suffolk County?
Suffolk County private high schools are approximately 38% minority students, which is higher than the New York private school average of 36%.
What percentage of private high schools are religiously affiliated in Suffolk County?
38% of private high schools in Suffolk County are religiously affiliated (most commonly Christian and Baptist).
Which private high schools in Suffolk County are often viewed compared to one another?

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