| Abraham Joshua Heschel School
| New York | NY | PK-12th | none | Coed | 716 | Jewish |
| Academy of Mount St. Ursula
| Bronx | NY | 9th-12th | none | Girls only | 421 | Roman Catholic |
| Academy of the Holy Angels
| Demarest | NJ | 9th-12th | none | Girls only | 540 | Roman Catholic |
| Albertus Magnus High School
| Bardonia | NY | 9th-12th | none | Coed | 451 | Roman Catholic |
| All Hallows High School
| New York | NY | 9th-12th | none | Boys only | 635 | Roman Catholic |
| Archbishop Molloy High School
| New York City | NY | 9th-12th | none | Coed | 1529 | Roman Catholic |
| Archbishop Stepinac High School
| White Plains | NY | 9th-12th | none | Boys only | 685 | Roman Catholic |
| Berkeley Carroll School
4/5
based on 1 student review(s) | Brooklyn | NY | PK-12th | none | Coed | 800 | None |
| Birch Wathen Lenox School
| New York | NY | K-12th | none | Coed | 550 | None |
| Bishop Loughlin Memorial High School
| Brooklyn | NY | 9th-12th | none | Coed | 880 | Roman Catholic |
| Brearley School
4.4/5
based on 1 student review(s) | New York | NY | K-12th | none | Girls only | 692 | Non-Denominational Christian |
| Brooklyn Friends School
| Brooklyn | NY | PK-12th | none | Coed | 700 | Quakers/Friends |
| Brunswick School
| Greenwich | CT | PK-12th | none | Boys only | 940 | None |
| Calhoun School
| New York | NY | PK-12th | none | Coed | 742 | None |
| Cathedral Preparatory Seminary
| Elmhurst | NY | 9th-12th | none | Boys only | 178 | Roman Catholic |
| Chapin School
| New York | NY | K-12th | none | Girls only | 728 | None |
| Collegiate School
| New York | NY | K-12th | none | Boys only | 630 | None |
| Convent of the Sacred Heart
| Greenwich | CT | PK-12th | none | Girls only | 748 | Roman Catholic |
| Convent of the Sacred Heart
3.8/5
based on 1 student review(s) | New York | NY | PK-12th | none | Girls only | 670 | Roman Catholic |
| Dalton School
4.6/5
based on 8 student review(s) | New York | NY | K-12th | none | Coed | 1280 | None |
| Dominican Academy
| New York | NY | 9th-12th | none | Coed | 248 | Roman Catholic |
| Dwight-Englewood School
| Englewood | NJ | PK-12th | none | Coed | 1007 | None |
| Ethical Culture Fieldston School
4.8/5
based on 2 student review(s) | Bronx | NY | PK-12th | none | Coed | 1600 | None |
| Fordham Preparatory School
| Bronx | NY | 9th-12th | none | Boys only | 919 | Roman Catholic (Jesuit) |
| Friends Academy
| Locust Valley | NY | PK-12th | none | Coed | 748 | Quakers/Friends |
| Friends Seminary
| New York | NY | K-12th | none | Coed | 670 | Quakers/Friends |
| Golda Och Academy
| West Orange | NH | PK-12th | none | Coed | 800 | Jewish |
| Governor's Academy
| Byfield | MA | 9th-12th | 9th-12th | Coed | 372 | None |
| Green Meadow Waldorf School
| Chestnut Ridge | NY | PK-12th | none | Coed | 382 | None |
| Greenwich Academy
| Greenwich | CT | PK-12th | none | Girls only | 802 | None |
| Hackley School
| Tarrytown | NY | K-12th | 9th-12th | Coed | 833 | None |
| Harvey School
| Katonah | NY | 6th-12th | 7th-12th | Coed | 336 | None |
| Hewitt School
| New York | NY | K-12th | none | Girls only | 506 | None |
| Horace Mann School
4.4/5
based on 6 student review(s) | Bronx | NY | PK-12th | none | Coed | 1781 | None |
| Hudson School
| Hoboken | NJ | 5th-12th | none | Coed | 204 | None |
| Iona Preparatory School
| New Rochelle | NY | 9th-12th | none | Boys only | 770 | Roman Catholic |
| John F. Kennedy Catholic High School
| Somers | NY | 9th-12th | none | Coed | 665 | Roman Catholic |
| Kew-Forest School
| Forest Hill | NY | K-12th | none | Coed | 385 | None |
| King Low Heywood Thomas
| Stamford | CT | PK-12th | none | Coed | 648 | None |
| Little Red School House and Elisabeth Irwin High School
| New York | NY | PK-12th | none | Coed | 560 | None |
| Long Island Lutheran High School
| Brookville | NY | 6th-12th | none | Coed | 609 | Lutheran |
| Loyola School
| New York | NY | 9th-12th | none | Coed | 205 | Roman Catholic |
| Martin Luther High School
| Maspeth | NY | 9th-12th | none | Coed | 350 | Lutheran |
| Mary Louis Academy
| Jamaica Estates | NY | 9th-12th | none | Girls only | 992 | Roman Catholic |
| Marymount School of NY
| New York | NY | PK-12th | none | Girls only | 565 | Roman Catholic |
| Masters School
| Dobbs Ferry | NY | 5th-12th | 9th-12th | Coed | 560 | None |
| Montclair Kimberley Academy
| Montclair | NJ | PK-12th | none | Coed | 1046 | None |
| New York Military Academy
| Cornwall-on-Hudson | NY | 7th-12th | 7th-12th | Coed | 141 | None |
| Newark Academy
4.6/5
based on 2 student review(s) | Linvingston | NJ | 6th-12th | none | Coed | 555 | None |
| Nightingale-Bamford School
| New York | NY | PK-12th | none | Girls only | 550 | None |
| Packer Collegiate Institute
| Brooklyn | NY | PK-12th | none | Coed | 940 | None |
| Portledge School
| Locust Valley | NY | None-12th | none | Coed | 460 | None |
| Professional Children's School
| New York | NY | 6th-12th | none | Coed | 205 | None |
| Regis High School
4.5/5
based on 4 student review(s) | New York | NY | 9th-12th | none | Boys only | 535 | Roman Catholic (Jesuit) |
| Riverdale Country School
| Riverdale | NY | PK-12th | none | Coed | 1060 | None |
| Rudolf Steiner School
| New York | NY | PK-12th | none | Coed | 336 | None |
| Rye Country Day School
5/5
based on 1 student review(s) | Rye | NY | PK-12th | none | Coed | 860 | None |
| Saddle River Day School
| Saddle River | NJ | K-12th | none | Coed | 317 | None |
| Saint Agnes Boys High School
| New York | NY | 9th-12th | none | Boys only | 300 | Roman Catholic |
| Saint Ann's School
| Brooklyn | NY | PK-12th | none | Coed | 1083 | None |
| School of the Holy Child
| Rye | NY | 5th-12th | none | Girls only | 330 | Roman Catholic |
| Solomon Schechter School of Westchester
| Hartsdale | NY | K-12th | none | Coed | 965 | Jewish |
| Spence School
5/5
based on 1 student review(s) | New York | NY | K-12th | none | Girls only | 658 | None |
| St. Agnes Academic High School
| College Point | NY | 9th-12th | none | Girls only | 416 | Roman Catholic |
| St. Dominic Academy
| Jersey City | NJ | 9th-12th | none | Girls only | 485 | Roman Catholic |
| St. Francis Preparatory School
| Fresh Meadows | NY | 9th-12th | none | Coed | 2750 | Roman Catholic |
| St. Luke's School
| New Canaan | CT | 5th-12th | none | Coed | 504 | None |
| Saint Peter's Preparatory School
| Jersey City | NJ | 9th-12th | none | Boys only | 915 | Roman Catholic (Jesuit) |
| St. Vincent Ferrer High School
| New York | NY | 9th-12th | none | Girls only | 500 | Roman Catholic |
| Trevor Day School
| New York | NY | PK-12th | none | Coed | 790 | None |
| Trinity Catholic High School
| Stamford | CT | 9th-12th | none | Coed | 405 | Roman Catholic |
| Trinity School
4.5/5
based on 4 student review(s) | New York | NY | K-12th | none | Coed | 960 | Episcopal |
| United Nations International School
5/5
based on 1 student review(s) | New York | NY | K-12th | none | Coed | 1550 | None |
| Windsor School
| Flushing | NY | 6th-PG | none | Coed | 160 | None |
| Xavier High School
| New York | NY | 9th-12th | none | Boys only | 938 | Roman Catholic |