| Limestone Parochial School | 3.8 |
Regular elementary or secondary | 1-9 | 29 | 29.0 | Mennonite |
| Maranatha Mennonite Christian School | 4.0 |
Regular elementary or secondary | KG-12 | 84 | 9.8 | Mennonite |
| Watsontown Christian Academy | 5.5 |
Regular elementary or secondary | Pre-KG-12 | 41 | 4.3 | Christian (no specific denomination) |
| Spring View Parochial School | 5.8 |
Regular elementary or secondary | 1-9 | 28 | 28.0 | Amish |
| Sunbury Christian Academy | 8.2 |
Regular elementary or secondary | Pre-KG-12 | 134 | 8.4 | Christian (no specific denomination) |
| Northumberland Christian School | 9.0 |
Regular elementary or secondary | Pre-KG-12 | 209 | 13.9 | Baptist |
| Shady Grove Christian School | 11.5 |
Regular elementary or secondary | KG-11 | 73 | 9.4 | Mennonite |
| Hillside Christian Academy | 12.4 |
Regular elementary or secondary | KG-12 | 55 | 14.1 | Other |
| Buffalo Creek Parochial School | 12.8 |
Regular elementary or secondary | 1-9 | 9 | 9.0 | Mennonite |
| Gospel Christian Academy | 14.4 |
Regular elementary or secondary | KG-11 | 23 | 5.0 | Baptist |
| Meadowview Christian Academy | 16.1 |
Regular elementary or secondary | Pre-KG-10 | 37 | 4.9 | Christian (no specific denomination) |
| Penn View Christian Academy | 16.7 |
Regular elementary or secondary | Pre-KG-12 | 142 | 10.1 | Other |
| Columbia County Christian School | 17.1 |
Regular elementary or secondary | KG-12 | 179 | 9.2 | Christian (no specific denomination) |
| Williamsport Christian School | 18.2 |
Regular elementary or secondary | Pre-KG-12 | 39 | 5.7 | Baptist |
| Keystone Christian School Of Williamsport | 18.7 |
Regular elementary or secondary | Pre-KG-11 | 58 | 9.1 | Christian (no specific denomination) |
| Keystone Christian School | 18.7 |
Regular elementary or secondary | Pre-KG-11 | 64 | 8.5 | Christian (no specific denomination) |
| West Branch School | 19.0 |
Alternative/other | Ungraded-Ungraded | 36 | 9.0 | Nonsectarian |
| Leaning Oak School | 20.1 |
Regular elementary or secondary | 1-9 | 55 | 27.5 | Mennonite |
| Our Lady Lourdes Regional High School | 20.6 |
Regular elementary or secondary | KG-12 | 407 | 8.8 | Roman Catholic |
| Meadow View School | 20.8 |
Regular elementary or secondary | 1-9 | 25 | 25.0 | Mennonite |
| Bloomsburg Christian School | 22.1 |
Regular elementary or secondary | Pre-KG-12 | 52 | 6.2 | Baptist |
| Chapman Parochial School | 22.8 |
Regular elementary or secondary | 1-9 | 55 | 27.5 | Mennonite |
| Northwestern Academy | 22.9 |
Alternative/other | 5-12 | 268 | 11.7 | Nonsectarian |
