| Notre Dame Catholic High School | 4.9 |
Regular elementary or secondary | 9-12 | 573 | 15.4 | Roman Catholic |
| Center Of Progressive Education | 5.0 |
Special education | 9-12 | 27 | 5.4 | Nonsectarian |
| The Phoenix School | 5.1 |
Special education | 7-12 | 20 | 3.0 | Nonsectarian |
| Kolbe Cathedral High School | 5.9 |
Regular elementary or secondary | 9-12 | 323 | 14.7 | Roman Catholic |
| Academy Of Our Lady Of Mercy, Lauralton Hall | 6.0 |
Regular elementary or secondary | 9-12 | 432 | 11.7 | Roman Catholic |
| Bridgeport International Academy | 6.6 |
Special program emphasis | 9-12 | 61 | 8.7 | Christian (no specific denomination) |
| The Foundation School | 7.5 |
Special education | 9-12 | 46 | 3.5 | Nonsectarian |
| Fairfield College Preparatory | 8.2 |
Regular elementary or secondary | 9-12 | 892 | 15.2 | Roman Catholic |
| Beth Chana Academy High School For Girls | 8.6 |
Regular elementary or secondary | 9-12 | 15 | 3.5 | Jewish |
| Notre Dame High School | 10.8 |
Regular elementary or secondary | 9-12 | 671 | 14.8 | Roman Catholic |
| Hopkins School | 10.9 |
Special program emphasis | 7-12 | 679 | 5.4 | Nonsectarian |
| Seton Academy | 11.9 |
Special education | 9-12 | 10 | 3.3 | Nonsectarian |
| Rabbinical Institute Of New England | 12.1 |
Alternative/other | 9-12 | 80 | 10.7 | Jewish |
| Yeshiva Gedolah Rabbinical Institute Of New Engld | 12.1 |
Special program emphasis | 9-11 | 57 | 8.9 | Jewish |
| Cedarhurst School | 13.8 |
Special education | 7-12 | 47 | 5.0 | Nonsectarian |
| Sacred Heart Academy | 14.1 |
Regular elementary or secondary | 9-12 | 492 | 12.2 | Roman Catholic |
| Immaculate High School | 16.9 |
Regular elementary or secondary | 9-12 | 406 | 10.2 | Roman Catholic |
| Westover School | 18.6 |
Regular elementary or secondary | 9-12 | 194 | 6.4 | Nonsectarian |
| Holy Cross High School | 19.4 |
Regular elementary or secondary | 9-12 | 800 | 14.2 | Roman Catholic |
| Sacred Heart High School | 21.2 |
Regular elementary or secondary | 9-12 | 455 | 17.6 | Roman Catholic |
| Trinity Catholic High School | 22.4 |
Regular elementary or secondary | 9-12 | 542 | 14.7 | Roman Catholic |
| Choate Rosemary Hall | 23.0 |
Regular elementary or secondary | 9-12 | 846 | 8.1 | Nonsectarian |
| Yeshiva Bais Binyomin | 23.7 |
Regular elementary or secondary | 9-12 | 60 | 7.5 | Jewish |
| The Taft School | 23.8 |
Regular elementary or secondary | 9-12 | 576 | 7.7 | Nonsectarian |
