Private School Review - Established 2003
The Knox School Photo - Founded in 1904, The Knox School is Long Island`s oldest established private school. Our inclusive environment serves grades 6-12 and Post-Graduate, providing students with a broad world perspective and a wide range of skills to prepare them for the next phase of their journeys.
The Knox School

Best New York Private High Schools Belonging to National Association of Independent Schools (NAIS) (2025-26)

For the 2025-26 school year, there are 97 private high schools belonging to National Association of Independent Schools (NAIS) serving 51,919 students in New York. You can also find more schools membership associations in New York.
The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in New York include Friends Academy, BASIS Independent Brooklyn, and The Browning School.
The average tuition cost is $48,454, which is higher than the New York private high school average tuition cost of $26,922.
27% of private high schools belonging to National Association of Independent Schools (NAIS) in New York are religiously affiliated (most commonly Catholic and Jewish).

Top Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in New York (2025-26)

School
Location
Quick Facts
Adelphi Academy of Brooklyn
Adelphi Academy of Brooklyn Photo - Adelphi Academy of Brooklyn's historic Bay Ridge campus is located at 8515 Ridge Boulevard, in the heart of Bay Ridge, Brooklyn. .
(8)
8515 Ridge Boulevard
Brooklyn, NY 11209
(718) 238-3308
Gr: NS-12 | 235 students Avg. class size: 12 students Sports: 15 | Extracurrculars: 20 Tuition & acceptance rate listed
BASIS Independent Brooklyn
BASIS Independent Brooklyn Photo
556 Columbia Street
Brooklyn, NY 11231
(929) 626-5001
Gr: PK-12 | 676 students Avg. class size: 14 students Sports: 18 | Extracurrculars: 28 Tuition listed
BASIS Independent Manhattan
BASIS Independent Manhattan Photo - Early Learning Program
795 Columbus Avenue
New York, NY 10025
(929) 930-4798
Gr: PK-12 | 285 students Avg. class size: 15 students Sports: 10 | Extracurrculars: 17 Tuition listed
Bay Ridge Preparatory School
Bay Ridge Preparatory School Photo - With a fresh approach to education, Bay Ridge Prep gives students an enriching experience that lasts a lifetime. Curiosity is stimulated, confidence is built, character is strengthened and socially-responsible citizens are graduated and prepared to be leaders of a global society.
(5)
8101 Ridge Boulevard
Brooklyn, NY 11209
(718) 833-9090
Gr: K-12 | 367 students Avg. class size: 15 students Sports: 12 | Extracurrculars: 28 Tuition listed
Birch Wathen Lenox School
Birch Wathen Lenox School Photo
(10)
210 E 77th Street
New York, NY 10075
(212) 861-0404
Gr: K-12 Avg. class size: 15 students Sports: 11 | Extracurrculars: 16 Tuition listed
Buffalo Seminary
Buffalo Seminary Photo - Founded in 1851, and in this building since 1909, Buffalo Seminary is on the National Register of Historic Places. Our campus includes 5 faculty and student residences in adjacent restored historic homes, and Larkin Field, a 5-minute walk away on a leafy parkway.
All-girls
(12)
205 Bidwell Parkway
Buffalo, NY 14222
(716) 885-6780
Gr: 9-12 | 160 students Avg. class size: 10 students Sports: 16 | Extracurrculars: 34 Tuition & acceptance rate listed
Columbia Grammar & Preparatory School
Columbia Grammar & Preparatory School Photo
(3)
5 W 93rd St
New York, NY 10025
(212) 749-6200
Gr: PK-12 | 1,163 student Avg. class size: 14 students Sports: 14 | Extracurrculars: 74 Tuition listed
Friends Academy
Friends Academy Photo - Middle School Science
(Friends)
(11)
270 Duck Pond Road
Locust Valley, NY 11560
(516) 676-0393
Gr: NS-12 | 769 students Avg. class size: 12 students Sports: 18 | Extracurrculars: 46 Tuition & acceptance rate listed
Grace Church School
Grace Church School Photo
(Episcopal)
(5)
86 4th Ave
New York, NY 10003
(212) 475-5609
Gr: PK-12 | 850 students Avg. class size: 18 students Sports: 14 Tuition listed
The Knox School
The Knox School Photo - Founded in 1904, The Knox School is Long Island`s oldest established private school. Our inclusive environment serves grades 6-12 and Post-Graduate, providing students with a broad world perspective and a wide range of skills to prepare them for the next phase of their journeys.
(9)
541 Long Beach Road
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
Loyola School
Loyola School Photo
(Catholic)
980 Park Avenue
New York, NY 10028
(212) 288-3522
Gr: 9-12 | 204 students Avg. class size: 13 students Sports: 9 | Extracurrculars: 31 Tuition listed
Lycee Francais de New York
Lycee Francais de New York Photo
(1)
505 East 75th Street
New York, NY 10021
(212) 369-1400
Gr: NS-12 | 1,233 student Avg. class size: 18 students Sports: 9 | Extracurrculars: 33 Tuition listed
Manlius Pebble Hill School
Manlius Pebble Hill School Photo - The opening day Handshake Ceremony is a tradition that dates back generations, with the entire student body along with faculty and staff to welcome each other into a new academic year. Handshakes, hugs, high fives, fist bumps, waves, and rock-paper-scissors are all forms of greetings.
(1)
5300 Jamesville Rd
Syracuse, NY 13214
(315) 446-2452
Gr: PK-12 | 332 students Avg. class size: 13 students Sports: 9 Tuition listed
Professional Children's School
Professional Children's School Photo - Students collaborating in the PCS library.
(4)
132 W 60th St
New York, NY 10023
(212) 582-3116
Gr: 4-12 | 137 students Avg. class size: 12 students Extracurrculars: 19 Tuition & acceptance rate listed
THINK Global School
THINK Global School Photo - THINK Global School is comprised of 41 high school students who hail from all over the world. It's an opportunity to live next to and learn from a truly global student body.
960 Madison Avenue Fifth Floor
New York, NY 10021
(646) 808-0675
Gr: 11-12 | 36 students Avg. class size: 10 students Tuition & acceptance rate listed
Vincent Smith School
Vincent Smith School Photo - Upper School entrance
Special Education School
(3)
322 Port Washington Blvd
Port Washington, NY 11050
(516) 365-4900
Gr: 1-12 | 54 students Avg. class size: 6 students Extracurrculars: 10 Tuition & acceptance rate listed
The Waldorf School Of Garden City
The Waldorf School Of Garden City Photo - Welcome to the Waldorf School of Garden City!
Special Program Emphasis
(9)
225 Cambridge Avenue
Garden City, NY 11530
(516) 742-3434
Gr: NS-12 | 300 students Avg. class size: 18 students Sports: 11 | Extracurrculars: 13 Tuition listed
The Windsor School
The Windsor School Photo - Each year, our graduation ceremony takes places at Queens Botanical Garden. We are proud of our 100% graduation rate each year dating back to 1969, our first graduating class. Our graduates gain acceptance to top colleges and universities with substantial scholarship offers.
(10)
37-02 Main Street
Flushing, NY 11354
(718) 359-8300
Gr: 7-12 | 125 students Avg. class size: 15 students Sports: 6 | Extracurrculars: 8 Tuition & acceptance rate listed
ACADEMICS WEST
ACADEMICS WEST Photo
Special Education School
(12)
37 west 65th street, Floor 5
New York, NY 10023
(212) 580-0080
Gr: K-12 | 80 students Avg. class size: 5 students Sports: 2 | Extracurrculars: 7 Tuition & acceptance rate listed
Garden School
Garden School Photo - Our goal from the earliest grades through high school is to develop lifelong learners who excel in academics and individuals who enhance Garden School and the college they later attend. All students have their own strengths, weaknesses, talents, and dreams. The college search seeks to find the best match for our graduates, places where they can thrive and learn.
(40)
3316 79th St
Jackson Heights, NY 11372
(718) 335-6363
Gr: NS-12 | 259 students Avg. class size: 15 students Sports: 8 | Extracurrculars: 25 Tuition listed
The IDEAL School of Manhattan
The IDEAL School of Manhattan Photo - Students show the kindness snowflakes that they made.
Special Program Emphasis
(5)
5 Hanover Square
New York, NY 10004
(212) 769-1699
Gr: K-12 | 172 students Avg. class size: 14 students Sports: 5 | Extracurrculars: 10 Tuition & acceptance rate listed
The Kew-Forest School
The Kew-Forest School Photo - At The Kew-Forest School, you will find a community that nurtures lifelong learners, educators who inspire young people, and students who support each other. Established in 1918, Kew-Forest is the oldest independent co-ed, college preparatory school in Queens for students in Preschool through Grade 12. For more info, visit kewforest.org.
119-17 Union Tpke
Forest Hills, NY 11375
(718) 268-4667
Gr: NS-12 | 207 students Avg. class size: 12 students Sports: 12 | Extracurrculars: 23 Tuition listed
Abraham Joshua Heschel School
(Jewish)
20 W End Ave
New York, NY 10023
(212) 246-7717
Gr: PK-12 | 967 students Avg. class size: 15 students Tuition & acceptance rate listed
Albany Academies
135-140 Academy Road
Albany, NY 12208
(518) 429-2300
Gr: PK-12 | 680 students Avg. class size: 16 students Sports: 18 Tuition listed
Allendale Columbia School
Allendale Columbia School Photo - Allendale Columbia School has been a leading independent school in Rochester since 1890.
(6)
519 Allens Creek Road
Rochester, NY 14618
(585) 381-4560
Gr: NS-12 | 356 students Avg. class size: 8 students Sports: 11 | Extracurrculars: 25 Tuition & acceptance rate listed
Berkeley Carroll Elementary School
701 Carroll St
Brooklyn, NY 11215
(718) 534-6601
Gr: PK-12 | 803 students Tuition listed
Berkeley Carroll School
Berkeley Carroll School Photo - Berkeley Carroll is one of NYC's top independent schools.
(4)
181 Lincoln Place
Brooklyn, NY 11217
(718) 534-6060
Gr: PK-12 | 992 students Avg. class size: 16 students Sports: 13 | Extracurrculars: 35 Tuition listed
Brooklyn Friends School
Brooklyn Friends School Photo
(Friends)
(1)
375 Pearl St
Brooklyn, NY 11201
(718) 852-1029
Gr: PK-12 | 687 students Avg. class size: 18 students Sports: 9 Tuition listed
Brown School
Brown School Photo - Welcome to Brown School, a co-ed, Independent school for grades N-8th. Founded in 1893, Brown's 200+ Students receive a strong and diverse education in mathematics, sciences, languages, literature, history, foreign language, liberal arts, fine arts, music, social-emotional learning, and more in a small class setting.
(22)
150 Corlaer Avenue
Schenectady, NY 12304
(518) 370-0366
Gr: PK-12 | 148 students Avg. class size: 12 students Sports: 7 | Extracurrculars: 20 Tuition & acceptance rate listed
The Browning School
The Browning School Photo
All-boys
(12)
52 E 62nd St
New York, NY 10065
(212) 838-6280
Gr: K-12 | 472 students Avg. class size: 15 students Sports: 10 | Extracurrculars: 21 Tuition & acceptance rate listed
The Buckley School
All-boys
113 E 73rd St
New York, NY 10021
(212) 535-8787
Gr: K-9 | 366 students Tuition listed
Calhoun School
Calhoun School Photo - Upper School 9th Grade Active Physics
(9)
433 W End Ave
New York, NY 10024
(212) 497-6533
Gr: PK-12 | 603 students Tuition listed
The Chaplin School
All-girls
100 E End Ave
New York, NY 10028
(212) 744-2335
Gr: K-12 | 780 students Avg. class size: 15 students Acceptance rate listed
The Churchill School & Center
The Churchill School & Center Photo
Special Education School
301 E 29th St
New York, NY 10016
(212) 722-0610
Gr: K-12 | 441 students Avg. class size: 12 students Sports: 9 | Extracurrculars: 8 Tuition & acceptance rate listed
Collegiate School
All-boys
301 Freedom Place South
New York, NY 10069
(212) 812-8552
Gr: K-12 | 649 students Tuition listed
Show 62 more private schools in New York (out of 97 total schools)
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