| St Catherine Academy | 4.0 |
Special education | Ungraded-Ungraded | 15 | 5.0 | Roman Catholic |
| St Dominic's Academy | 5.3 |
Regular elementary or secondary | KG-12 | 20 | 5.0 | Roman Catholic |
| Fairfield Country Day School | 5.3 |
Regular elementary or secondary | KG-9 | 271 | 6.6 | Nonsectarian |
| Christian Heritage School | 5.8 |
Regular elementary or secondary | KG-12 | 528 | 11.5 | Christian (no specific denomination) |
| Giant Steps Connecticut | 7.0 |
Special education | KG-12 | 39 | 6.4 | Nonsectarian |
| St Vincent's Special Needs Services | 7.7 |
Special education | Ungraded-Ungraded | 64 | 5.7 | Nonsectarian |
| Eagle Hill - Southport | 8.0 |
Special education | Ungraded-Ungraded | 111 | 3.9 | Nonsectarian |
| Pierrepont School | 8.9 |
Regular elementary or secondary | KG-10 | 45 | 2.6 | Nonsectarian |
| Greens Farms Academy | 9.2 |
Regular elementary or secondary | KG-12 | 624 | 8.1 | Nonsectarian |
| Boys And Girls Village Day School | 11.4 |
Special education | 2-9 | 27 | 6.8 | Nonsectarian |
| Cccd - Connecticut Center For Child Development | 11.7 |
Special education | Pre-KG-12 | 42 | 6.0 | Nonsectarian |
| Wooster School | 13.2 |
Regular elementary or secondary | KG-12 | 343 | 6.4 | Episcopal |
| Colonial Hills Christian Academy | 14.4 |
Regular elementary or secondary | Pre-KG-9 | 60 | 7.1 | Baptist |
| New Canaan Country School | 14.4 |
Regular elementary or secondary | Pre-KG-9 | 565 | 5.9 | Nonsectarian |
| Berean Christian Academy | 14.7 |
Regular elementary or secondary | KG-12 | 81 | 6.2 | Christian (no specific denomination) |
| Southern Connecticut Hebrew Academy | 15.3 |
Special program emphasis | Pre-KG-12 | 165 | 11.9 | Jewish |
| Villa Maria Education Center | 15.3 |
Special education | KG-9 | 71 | 3.3 | Roman Catholic |
| Hope Academy | 15.3 |
Special education | 2-12 | 25 | 4.2 | Nonsectarian |
| Living Word Christian Academy | 16.6 |
Regular elementary or secondary | Pre-KG-12 | 159 | 9.1 | Christian (no specific denomination) |
| Children's Community Programs Of Ct | 18.3 |
Alternative/other | 3-12 | 78 | 4.1 | Nonsectarian |
| Yeshiva Of New Haven / The Gan School | 18.7 |
Special program emphasis | Pre-KG-12 | 39 | 2.6 | Jewish |
| Faith Academy | 18.7 |
Regular elementary or secondary | Pre-KG-12 | 177 | 13.6 | Christian (no specific denomination) |
| Foote School | 20.2 |
Regular elementary or secondary | KG-9 | 466 | 8.7 | Nonsectarian |
| The Stanwich School | 20.3 |
Regular elementary or secondary | Pre-KG-9 | 432 | 10.3 | Nonsectarian |
| Whitney Hall School | 21.0 |
Special education | 3-12 | 90 | 6.0 | Nonsectarian |
| The Greenwich Japanese School | 22.2 |
Regular elementary or secondary | 1-9 | 180 | 7.0 | Nonsectarian |
| Greenwich Academy | 22.4 |
Regular elementary or secondary | Pre-KG-12 | 772 | 8.1 | Nonsectarian |
| Brunswick School | 22.6 |
Regular elementary or secondary | Pre-KG-12 | 861 | 5.6 | Nonsectarian |
| Eagle Hill School | 23.5 |
Special education | Ungraded-Ungraded | 230 | 3.1 | Nonsectarian |
| Chase Collegiate School | 23.8 |
Regular elementary or secondary | Pre-KG-12 | 475 | 7.8 | Nonsectarian |
| Elizabeth Ives School For Special Children | 23.9 |
Special education | 4-11 | 15 | 3.8 | Nonsectarian |
