| Portland Lutheran School | 0.0 |
Regular elementary or secondary | Pre-KG-12 | 225 | 15.1 | Lutheran Church - Missouri Synod |
| Serp Alternative School | 1.4 |
Special education | Ungraded-Ungraded | 15 | 15.0 | Nonsectarian |
| Serendipity Center | 1.9 |
Special education | KG-12 | 133 | 9.2 | Nonsectarian |
| Portland Christian Schools | 3.2 |
Regular elementary or secondary | 6-12 | 372 | 12.4 | Christian (no specific denomination) |
| Portland Christian School | 3.2 |
Regular elementary or secondary | 6-12 | 372 | 11.5 | Christian (no specific denomination) |
| Columbia Christian Schools | 4.6 |
Regular elementary or secondary | Pre-KG-12 | 246 | 11.2 | Church of Christ |
| Open Door Christian Academy | 4.9 |
Regular elementary or secondary | Pre-KG-12 | 290 | 19.6 | Baptist |
| Portland Youth Builders | 4.9 |
Special program emphasis | Ungraded-Ungraded | 60 | 5.7 | Nonsectarian |
| City Christian Schools | 5.0 |
Regular elementary or secondary | Pre-KG-12 | 231 | 10.4 | Christian (no specific denomination) |
| Village Free School | 5.3 |
Regular elementary or secondary | 1-12 | 45 | 4.6 | Nonsectarian |
| Damascus Christian School | 6.9 |
Regular elementary or secondary | KG-12 | 255 | 8.8 | Christian (no specific denomination) |
| Lents Education Center | 7.1 |
Alternative/other | 6-10 | 33 | 6.6 | Nonsectarian |
| Portland Waldorf School | 9.3 |
Special program emphasis | KG-12 | 363 | 6.3 | Nonsectarian |
| The Northwest Academy | 10.1 |
Special program emphasis | 6-12 | 115 | 4.5 | Nonsectarian |
| Park Academy | 11.9 |
Special education | 3-11 | 21 | 4.9 | Nonsectarian |
| Oregon Episcopal School | 14.0 |
Regular elementary or secondary | Pre-KG-12 | 812 | 9.0 | Episcopal |
| Catlin Gabel School | 14.2 |
Regular elementary or secondary | Pre-KG-12 | 708 | 8.3 | Nonsectarian |
| North Clackamas Christian School | 14.3 |
Regular elementary or secondary | Pre-KG-12 | 218 | 14.1 | Christian (no specific denomination) |
| La Petite Academy | 16.0 |
Early childhood program/child care center | Ungraded-Ungraded | 45 | 22.5 | Nonsectarian |
| Islamic School Of Met (ismet) | 16.0 |
Regular elementary or secondary | Pre-KG-9 | 104 | 7.7 | Islamic |
| St Stephens Academy | 16.1 |
Special program emphasis | KG-11 | 79 | 7.1 | Presbyterian |
| Cor Deo Christian Academy | 17.0 |
Regular elementary or secondary | 1-10 | 72 | 6.9 | Christian (no specific denomination) |
| Westgate Christian School | 17.0 |
Regular elementary or secondary | Pre-KG-12 | 155 | 18.0 | Baptist |
| Faith Bible Christian School | 18.3 |
Regular elementary or secondary | Pre-KG-12 | 349 | 13.7 | Christian (no specific denomination) |
| Horizon Christian High School | 18.5 |
Regular elementary or secondary | KG-12 | 483 | 12.6 | Other |
| Palace Of Praise Academy | 19.9 |
Regular elementary or secondary | KG-11 | 26 | 4.0 | Pentecostal |
| Life Christian School | 20.4 |
Regular elementary or secondary | Pre-KG-12 | 271 | 17.1 | Christian (no specific denomination) |
| Tualatin Valley Jr Academy | 20.7 |
Regular elementary or secondary | Pre-KG-10 | 251 | 15.4 | Seventh-Day Adventist |
| Heritage Christian School | 23.8 |
Special program emphasis | KG-12 | 204 | 12.1 | Christian (no specific denomination) |
| Country Christian School | 24.0 |
Regular elementary or secondary | Pre-KG-12 | 247 | 9.1 | Christian (no specific denomination) |
