| Colonial Hills Christian Academy | 5.5 |
Regular elementary or secondary | Pre-KG-9 | 60 | 7.1 | Baptist |
| Faith Academy | 10.2 |
Regular elementary or secondary | Pre-KG-12 | 177 | 13.6 | Christian (no specific denomination) |
| St Dominic's Academy | 12.4 |
Regular elementary or secondary | KG-12 | 20 | 5.0 | Roman Catholic |
| Phoenix Academy | 13.2 |
Regular elementary or secondary | Pre-KG-9 | 89 | 6.3 | Nonsectarian |
| Villa Maria Education Center | 15.9 |
Special education | KG-9 | 71 | 3.3 | Roman Catholic |
| New Canaan Country School | 16.4 |
Regular elementary or secondary | Pre-KG-9 | 565 | 5.9 | Nonsectarian |
| St Catherine Academy | 17.0 |
Special education | Ungraded-Ungraded | 15 | 5.0 | Roman Catholic |
| Fairfield Country Day School | 17.2 |
Regular elementary or secondary | KG-9 | 271 | 6.6 | Nonsectarian |
| Pierrepont School | 17.3 |
Regular elementary or secondary | KG-10 | 45 | 2.6 | Nonsectarian |
| Christian Heritage School | 18.5 |
Regular elementary or secondary | KG-12 | 528 | 11.5 | Christian (no specific denomination) |
| Giant Steps Connecticut | 18.7 |
Special education | KG-12 | 39 | 6.4 | Nonsectarian |
| Eagle Hill - Southport | 19.6 |
Special education | Ungraded-Ungraded | 111 | 3.9 | Nonsectarian |
| Greens Farms Academy | 19.7 |
Regular elementary or secondary | KG-12 | 624 | 8.1 | Nonsectarian |
| St Vincent's Special Needs Services | 20.1 |
Special education | Ungraded-Ungraded | 64 | 5.7 | Nonsectarian |
| The Stanwich School | 21.2 |
Regular elementary or secondary | Pre-KG-9 | 432 | 10.3 | Nonsectarian |
| The Glenholme School | 21.8 |
Special education | 6-12 | 106 | 4.8 | Nonsectarian |
| The Arch Bridge School | 22.8 |
Special education | 2-12 | 39 | 4.2 | Nonsectarian |
| The Greenwich Japanese School | 23.2 |
Regular elementary or secondary | 1-9 | 180 | 7.0 | Nonsectarian |
| Boys And Girls Village Day School | 23.3 |
Special education | 2-9 | 27 | 6.8 | Nonsectarian |
| Greenwich Academy | 23.5 |
Regular elementary or secondary | Pre-KG-12 | 772 | 8.1 | Nonsectarian |
| Brunswick School | 23.8 |
Regular elementary or secondary | Pre-KG-12 | 861 | 5.6 | Nonsectarian |
| Rumsey Hall School | 23.9 |
Regular elementary or secondary | KG-9 | 302 | 7.5 | Nonsectarian |
| Cccd - Connecticut Center For Child Development | 24.3 |
Special education | Pre-KG-12 | 42 | 6.0 | Nonsectarian |
| Eagle Hill School | 24.5 |
Special education | Ungraded-Ungraded | 230 | 3.1 | Nonsectarian |
