| Shady Grove Christian School | 3.5 |
Regular elementary or secondary | KG-11 | 73 | 9.4 | Mennonite |
| Hillside Christian Academy | 3.8 |
Regular elementary or secondary | KG-12 | 55 | 14.1 | Other |
| Penn View Christian Academy | 5.0 |
Regular elementary or secondary | Pre-KG-12 | 142 | 10.1 | Other |
| Leaning Oak School | 10.2 |
Regular elementary or secondary | 1-9 | 55 | 27.5 | Mennonite |
| Gospel Christian Academy | 11.8 |
Regular elementary or secondary | KG-11 | 23 | 5.0 | Baptist |
| Northumberland Christian School | 12.6 |
Regular elementary or secondary | Pre-KG-12 | 209 | 13.9 | Baptist |
| Meadowbrook Christian School | 12.8 |
Regular elementary or secondary | Pre-KG-12 | 242 | 11.3 | Christian (no specific denomination) |
| Sunbury Christian Academy | 14.3 |
Regular elementary or secondary | Pre-KG-12 | 134 | 8.4 | Christian (no specific denomination) |
| Watsontown Christian Academy | 15.1 |
Regular elementary or secondary | Pre-KG-12 | 41 | 4.3 | Christian (no specific denomination) |
| Spring View Parochial School | 15.1 |
Regular elementary or secondary | 1-9 | 28 | 28.0 | Amish |
| Meadow View School | 15.9 |
Regular elementary or secondary | 1-9 | 25 | 25.0 | Mennonite |
| Maranatha Mennonite Christian School | 16.4 |
Regular elementary or secondary | KG-12 | 84 | 9.8 | Mennonite |
| Limestone Parochial School | 16.6 |
Regular elementary or secondary | 1-9 | 29 | 29.0 | Mennonite |
| Chapman Parochial School | 17.3 |
Regular elementary or secondary | 1-9 | 55 | 27.5 | Mennonite |
| West Branch School | 21.1 |
Alternative/other | Ungraded-Ungraded | 36 | 9.0 | Nonsectarian |
| Meadowview Christian Academy | 22.1 |
Regular elementary or secondary | Pre-KG-10 | 37 | 4.9 | Christian (no specific denomination) |
| Keystone Christian School | 22.3 |
Regular elementary or secondary | Pre-KG-11 | 64 | 8.5 | Christian (no specific denomination) |
| Keystone Christian School Of Williamsport | 22.3 |
Regular elementary or secondary | Pre-KG-11 | 58 | 9.1 | Christian (no specific denomination) |
| Walnut Street Christian School | 22.8 |
Regular elementary or secondary | Pre-KG-12 | 141 | 11.5 | Baptist |
| Williamsport Christian School | 23.1 |
Regular elementary or secondary | Pre-KG-12 | 39 | 5.7 | Baptist |
| Juniata Mennonite School | 23.7 |
Regular elementary or secondary | KG-12 | 215 | 11.6 | Mennonite |
| Good Will Mennonite School | 24.0 |
Regular elementary or secondary | 1-9 | 30 | 8.3 | Mennonite |
