| Harford Christian School | 0.0 |
Regular elementary or secondary | Pre-KG-12 | 414 | 10.7 | Methodist |
| Bethel Christian Academy | 9.0 |
Regular elementary or secondary | KG-11 | 22 | 7.3 | Pentecostal |
| Harford Lutheran School | 10.5 |
Regular elementary or secondary | 6-11 | 95 | 7.5 | Lutheran Church - Missouri Synod |
| Lighthouse Christian Academy | 11.1 |
Regular elementary or secondary | Pre-KG-12 | 102 | 8.2 | Baptist |
| Emmorton Baptist Academy | 11.2 |
Regular elementary or secondary | KG-12 | 25 | 12.5 | Baptist |
| New Covenant Christian School | 11.9 |
Regular elementary or secondary | Pre-KG-9 | 176 | 16.3 | Presbyterian |
| First Steps Preschool & Covenant Christian School | 11.9 |
Regular elementary or secondary | Pre-KG-9 | 178 | 12.8 | Presbyterian |
| Open Bible Christian Academy | 15.4 |
Regular elementary or secondary | Pre-KG-12 | 232 | 10.9 | Christian (no specific denomination) |
| Redeemer Classical Christ School | 16.7 |
Special program emphasis | Pre-KG-12 | 296 | 13.0 | Christian (no specific denomination) |
| Chesapeake Christian School | 17.4 |
Regular elementary or secondary | KG-12 | 78 | 8.8 | Christian (no specific denomination) |
| The Tome School | 18.7 |
Regular elementary or secondary | KG-12 | 490 | 13.3 | Nonsectarian |
| Perry Hall Christian School | 19.2 |
Regular elementary or secondary | Pre-KG-12 | 253 | 12.9 | Baptist |
| Villa Maria School | 22.2 |
Alternative/other | Ungraded-Ungraded | 183 | 4.9 | Nonsectarian |
| Villa Maria School | 22.2 |
Special education | Ungraded-Ungraded | 120 | 5.5 | Roman Catholic |
| Maranatha Baptist Church Academy | 22.5 |
Regular elementary or secondary | 1-12 | 16 | 2.5 | Baptist |
| Notre Dame Preparatory School | 23.2 |
Regular elementary or secondary | 6-12 | 762 | 8.8 | Roman Catholic |
| Shorehaven School | 23.4 |
Special education | Ungraded-Ungraded | 32 | 6.4 | Nonsectarian |
| Baltimore Middle & Upper School | 23.5 |
Regular elementary or secondary | 6-12 | 460 | 13.0 | Lutheran Church - Missouri Synod |
| The Arrow Center For Education | 23.5 |
Special education | 6-12 | 41 | 8.2 | Christian (no specific denomination) |
| Rosedale Baptist School | 23.8 |
Regular elementary or secondary | Pre-KG-12 | 166 | 12.9 | Baptist |
| Kingdom Academy | 24.2 |
Regular elementary or secondary | KG-12 | 100 | 8.8 | Church of God |
| Elkton Christian Academy | 24.3 |
Regular elementary or secondary | Pre-KG-12 | 447 | 11.9 | Baptist |
| The Maryland School For The Blind | 24.5 |
Special education | Pre-KG-12 | 172 | 4.5 | Nonsectarian |
| United Cerebral Palsy Of Md- Harford Development | 24.6 |
Special education | Ungraded-Ungraded | 11 | 11.0 | Nonsectarian |
