For the 2025-26 school year, there are 25 private high schools serving 6,542 students in Suffolk County, NY.
The top ranked private high schools in Suffolk County, NY include The Stony Brook School, The Knox School, and St. John The Baptist Diocesan High School.
The average tuition cost is $26,278, which is lower than the New York private high school average tuition cost of $26,902.
Top Ranked Suffolk County Private High Schools (2025-26)
School
Location
Quick Facts
500 Montauk Highway
East Islip, NY 11769
(631) 869-1572
East Islip, NY 11769
(631) 869-1572
Gr: 6-12 Avg. class size: 8 students Sports: 11 Tuition & acceptance rate listed
541 Long Beach Road
Saint James, NY 11780
(631) 686-1600
Saint James, NY 11780
(631) 686-1600
Gr: 6-12 | 132 students Avg. class size: 12 students Sports: 9 | Extracurrculars: 31 Tuition & acceptance rate listed
1 Higbie Dr
Smithtown, NY 11787
(631) 265-3334
Smithtown, NY 11787
(631) 265-3334
Gr: PK-12 | 353 students Avg. class size: 18 students Sports: 6 | Extracurrculars: 16 Tuition & acceptance rate listed
Crestwood Country Day School
Daycare / Preschool
313 Round Swamp Rd
Melville, NY 11747
(631) 692-6361
Melville, NY 11747
(631) 692-6361
Gr: PK-12 | 346 students Tuition & acceptance rate listed
Madonna Height School
All-girls | Alternative School
151 Burrs Ln
Huntington Station, NY 11746
(631) 213-0188
Huntington Station, NY 11746
(631) 213-0188
Gr: 7-12 | 44 students
18 Goodfriend Road
East Hampton, NY 11937
(631) 907-5268
East Hampton, NY 11937
(631) 907-5268
Gr: PK-12 | 359 students Avg. class size: 11 students Sports: 17 | Extracurrculars: 22 Tuition & acceptance rate listed
St. Anthony's High School
(Catholic)
275 Wolf Hill Rd
Melville, NY 11747
(631) 271-2020
Melville, NY 11747
(631) 271-2020
Gr: 9-12 | 2,305 students Tuition & acceptance rate listed
1170 Montauk Highway
West Islip, NY 11795
(631) 587-8000
West Islip, NY 11795
(631) 587-8000
Gr: 9-12 | 1,200 student 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"]( "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
Stony Brook, NY 11790
(631) 751-1800
Gr: 7-12 | 487 students Avg. class size: 14 students Sports: 15 | Extracurrculars: 24 Tuition & acceptance rate listed
722 Deer Park Rd
Huntington Station, NY 11746
(631) 242-5359
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
175 Wolf Hill Road
Melville, NY 11747
(631) 423-2658
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
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
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
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
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
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
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]( "Leonard E Burket Christian School Photo")
(Assembly of God)
34 Oak St
Center Moriches, NY 11934
(631) 878-1727
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
Holtsville, NY 11742
(631) 447-2552
Gr: 2-12 | 7 students
Long Island School For The Gifted![Long Island School For The Gifted Photo - We provide remote learning resources for all our students.]( "Long Island School For The Gifted Photo - We provide remote learning resources for all our students.")
Special Program Emphasis
165 Pidgeon Hill Rd Ste 1
Huntington Station, NY 11746
(631) 423-3557
Huntington Station, NY 11746
(631) 423-3557
Gr: K-9 | 105 students Avg. class size: 16 students Extracurrculars: 11
140 Mark Tree Rd
Centereach, NY 11720
(631) 588-2757
Centereach, NY 11720
(631) 588-2757
Gr: PK-12 | 188 students Avg. class size: 10 students Sports: 6 | Extracurrculars: 6 Tuition listed
Sunshine Alternative Education Center
Alternative School
468 Boyle Rd
Port Jefferson Station, NY 11776
(631) 476-3099
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
Patchogue, NY 11772
(631) 654-9284
Gr: PK-12 | 65 students
Winston Preparatory School Long Island![Winston Preparatory School Long Island Photo]( "Winston Preparatory School Long Island Photo")
Special Education School
30 Deforest Road
Huntington Station, NY 11746
(631) 779-2400
Huntington Station, NY 11746
(631) 779-2400
Gr: 3-12 | 62 students Avg. class size: 12 students Tuition & acceptance rate listed
Suffolk County Private Schools (Closed)
School
Location
Quick Facts
37 Rollstone Avenue
West Sayville, NY 11796
(631) 589-2180
West Sayville, NY 11796
(631) 589-2180
Gr: K-12 | 50 students Avg. class size: 8 students Acceptance rate listed
Bay Shore Christian School (Closed 2025)
(Christian)
211 Bay Shore Rd
Bay Shore, NY 11706
(631) 665-5241
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
Riverhead, NY 11901
(631) 727-5900
Gr: 7-12 | 467 students
Chatterbox Day School (Closed 2015)
Daycare / Preschool
52 Hawthorne Ave
East Islip, NY 11730
(631) 581-4756
East Islip, NY 11730
(631) 581-4756
Gr: PK-1 | 61 students
74 Suffolk Lane
East Islip, NY 11730
(631) 581-1035
East Islip, NY 11730
(631) 581-1035
Gr: PK-12 | 63 students
2 Indian Head Rd
Commack, NY 11725
(631) 543-0202
Commack, NY 11725
(631) 543-0202
Gr: PK-8 | 223 students
74 Hauppauge Rd
Commack, NY 11725
(631) 368-2600
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
Lake Grove, NY 11755
(516) 585-8776
Gr: 8-12 | 60 students
821 Hawkins Ave
Lake Grove, NY 11755
(631) 585-0521
Lake Grove, NY 11755
(631) 585-0521
Gr: PK-8 | 26 students
New Discovery Early Childhood Center (Closed 2016)
Daycare / Preschool
180 Lawrence Rd
Kings Park, NY 11754
(631) 544-0830
Kings Park, NY 11754
(631) 544-0830
Gr: K | 127 students
240 S Wellwood Ave
Lindenhurst, NY 11757
(631) 226-0208
Lindenhurst, NY 11757
(631) 226-0208
Gr: PK-8 | 263 students
200 W Main St
Sayville, NY 11782
(631) 589-3426
Sayville, NY 11782
(631) 589-3426
Gr: PK-8 | 187 students
Rainbow Chimes, Inc. (Closed 2008)
Daycare / Preschool
320 Broadway-greenlawn Rd.
Huntington, NY 11743
(631) 427-6300
Huntington, NY 11743
(631) 427-6300
Gr: PK-K | 64 students
500 W Montauk Hwy
Bay Shore, NY 11706
(631) 666-0908
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
Huntington Station, NY 11745
(631) 549-7450
Gr: PK-K | 96 students
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 The Stony Brook School, The Knox School, and St. John The Baptist Diocesan High 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 $26,278, which is lower than the New York private school average tuition cost of $26,902.
How diverse are private high schools in Suffolk County?
Suffolk County private high schools are approximately 39% minority students, which is higher than the New York private school average of 38%.
What percentage of private high schools are religiously affiliated in Suffolk County?
Which private high schools in Suffolk County are often viewed compared to one another?
Popular comparisons of private high schools in Suffolk County include: St. John The Baptist Diocesan High School vs. St. Anthony's High School, St. Anthony's High School vs. St. John The Baptist Diocesan High School, Gersh Academy vs. Ascent School For Individuals With Autism
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