| Susquehanna Adventist School | 1.5 |
Regular elementary or secondary | 1-6 | 9 | 9.0 | Seventh-Day Adventist |
| St Joan Of Arc School | 6.7 |
Regular elementary or secondary | KG-8 | 203 | 13.0 | Roman Catholic |
| The Monarch Montessori School | 10.5 |
Montessori | Pre-KG-KG | 3 | 1.5 | Nonsectarian |
| Monarch Montessori School | 10.5 |
Montessori | Pre-KG-KG | 3 | 1.5 | Nonsectarian |
| Highlands School The | 11.4 |
Regular elementary or secondary | 2-8 | 78 | 11.1 | Nonsectarian |
| Mount Aviat Academy | 12.8 |
Regular elementary or secondary | Pre-KG-8 | 236 | 18.1 | Roman Catholic |
| Immaculate Conception School | 13.2 |
Regular elementary or secondary | KG-8 | 264 | 18.7 | Roman Catholic |
| Awakening Child Montessori School | 13.5 |
Montessori | Pre-KG-KG | 10 | 2.6 | Nonsectarian |
| Harford Day School | 14.8 |
Regular elementary or secondary | Pre-KG-8 | 324 | 8.8 | Nonsectarian |
| St Margaret School | 15.0 |
Regular elementary or secondary | Pre-KG-8 | 764 | 17.6 | Roman Catholic |
| Bel Forest Christian Academy | 16.3 |
Regular elementary or secondary | Pre-KG-8 | 57 | 9.7 | Baptist |
| Advent Lutheran Elementary School | 16.9 |
Regular elementary or secondary | KG-4 | 45 | 7.6 | Lutheran Church - Missouri Synod |
| Trinity Lutheran School | 17.0 |
Regular elementary or secondary | KG-8 | 267 | 11.2 | Evangelical Lutheran Church in America |
| Mountain Christian School | 17.6 |
Regular elementary or secondary | KG-8 | 302 | 12.3 | Christian (no specific denomination) |
| Harford Friends School | 17.8 |
Regular elementary or secondary | 6-8 | 19 | 3.8 | Friends |
| Childrens Center Of N Harford | 17.8 |
Early childhood program/child care center | Pre-KG-KG | 3 | 3.0 | Nonsectarian |
| St Stephen Parochial School | 19.8 |
Regular elementary or secondary | Pre-KG-8 | 282 | 17.1 | Roman Catholic |
| Friendship Montessori School | 20.0 |
Montessori | Pre-KG-KG | 6 | 2.0 | Nonsectarian |
| St Pauls Lutheran School | 20.0 |
Regular elementary or secondary | Pre-KG-8 | 148 | 14.4 | Lutheran Church - Missouri Synod |
| Free State Montessori School | 21.1 |
Montessori | Pre-KG-8 | 36 | 8.8 | Nonsectarian |
| St John Evangelist Elem School | 22.4 |
Regular elementary or secondary | Pre-KG-8 | 235 | 11.0 | Roman Catholic |
| Heritage Montessori School | 23.9 |
Montessori | Pre-KG-5 | 30 | 6.8 | Nonsectarian |
| Radcliffe Creek School | 23.9 |
Special education | Pre-KG-8 | 88 | 3.6 | Nonsectarian |
| Tabernacle Christian School | 25.0 |
Regular elementary or secondary | Pre-KG-8 | 80 | 7.3 | Pentecostal |
