| Avon Old Farms School
| Avon | CT | 9th-12th | 9th-12th | Boys only | 405 | None |
| Canterbury School 4/5 based on 1 student review(s) | New Milford | CT | 9th-PG | 9th-PG | Coed | 380 | Roman Catholic |
| Chase Collegiate School
| Waterbury | CT | PK-12th | none | Coed | 451 | None |
| Cheshire Academy 3.2/5 based on 1 student review(s) | Cheshire | CT | 6th-PG | 9th-PG | Coed | 378 | None |
| Choate Rosemary Hall 4.6/5 based on 10 student review(s) | Wallingford | CT | 9th-PG | 9th-PG | Coed | 830 | None |
| Christian Heritage School
| Trumbull | CT | K-12th | none | Coed | 450 | Non-Denominational Christian |
| Ethel Walker School 4.6/5 based on 1 student review(s) | Simsbury | CT | 6th-12th | 9th-12th | Girls only | 269 | None |
| Gunnery School 3.6/5 based on 1 student review(s) | Washington | CT | 9th-PG | 9th-PG | Coed | 300 | None |
| Hamden Hall Country Day School
| Hamden | CT | PK-12th | none | Coed | 565 | None |
| Holy Cross High School
| Waterbury | CT | 9th-12th | none | Coed | 760 | Roman Catholic |
| Hopkins School 5/5 based on 2 student review(s) | New Haven | CT | 7th-12th | none | Coed | 681 | None |
| Hotchkiss School 4.5/5 based on 4 student review(s) | Lakeville | CT | 9th-PG | 9th-PG | Coed | 560 | None |
| Immaculate High School
| Danbury | CT | 9th-12th | none | Coed | 406 | Roman Catholic |
| John F. Kennedy Catholic High School
| Somers | NY | 9th-12th | none | Coed | 665 | Roman Catholic |
| Kent School 4.9/5 based on 3 student review(s) | Kent | CT | 9th-PG | 9th-PG | Coed | 564 | Episcopal |
| Marvelwood School
| Kent | CT | 9th-12th | 9th-12th | Coed | 170 | None |
| Millbrook School
| Millbrook | NY | 9th-12th | 9th-12th | Coed | 252 | None |
| Miss Porter's School 4.1/5 based on 4 student review(s) | Farmington | CT | 9th-12th | 9th-12th | Girls only | 333 | None |
| Sacred Heart Academy
| Hamden | CT | 9th-12th | none | Girls only | 495 | Roman Catholic |
| Salisbury School
| Salisbury | CT | 9th-PG | 9th-PG | Boys only | 295 | Episcopal |
| St. Paul Catholic High School
| Briston | CT | 9th-12th | none | Coed | 300 | Roman Catholic |
| Taft School 4.3/5 based on 3 student review(s) | Watertown | CT | 9th-PG | 9th-PG | Coed | 580 | None |
| Trinity-Pawling School
| Pawling | NY | 7th-PG | 9th-PG | Boys only | 320 | Episcopal |
| Westminster School 4.4/5 based on 2 student review(s) | Simsbury | CT | 9th-PG | 9th-PG | Coed | 390 | None |
| Westover School
| Middlebury | CT | 9th-12th | 9th-12th | Girls only | 193 | None |
| Wooster School
| Danbury | CT | PK-12th | none | Coed | 346 | Episcopal |