| Upland Christian Schools | 0.3 |
Regular elementary or secondary | KG-12 | 607 | 15.2 | Church of the Nazarene |
| Gospel Restoration Academy | 0.4 |
Regular elementary or secondary | Pre-KG-12 | 18 | 3.0 | Church of God |
| San Antonio Christian School | 1.9 |
Regular elementary or secondary | KG-10 | 89 | 14.6 | Seventh-Day Adventist |
| Montecito Baptist School | 5.8 |
Regular elementary or secondary | KG-12 | 98 | 11.5 | Baptist |
| City Of Knowledge School | 5.8 |
Regular elementary or secondary | Pre-KG-12 | 233 | 13.0 | Islamic |
| Haynes Education Center | 6.2 |
Special education | 2-12 | 99 | 7.6 | Nonsectarian |
| Joan Macy School | 7.9 |
Special education | 6-12 | 44 | 5.9 | Nonsectarian |
| Calvary Baptist Schools | 8.0 |
Regular elementary or secondary | Pre-KG-12 | 95 | 4.8 | Baptist |
| Canyon View School | 10.0 |
Special education | KG-12 | 109 | 9.1 | Nonsectarian |
| Live Oak Canyon School | 11.5 |
Special education | 2-12 | 38 | 8.3 | Nonsectarian |
| Covina Baptist Academy | 11.9 |
Regular elementary or secondary | KG-12 | 25 | 6.9 | Baptist |
| Quest Academy Inc | 12.0 |
Special education | KG-12 | 60 | 10.0 | Nonsectarian |
| Altus Academy Rialto | 13.9 |
Special education | KG-12 | 57 | 11.4 | Nonsectarian |
| Western Christian Isp | 14.7 |
Alternative/other | KG-12 | 496 | 50.6 | Christian (no specific denomination) |
| Bloomington Christian School | 14.9 |
Regular elementary or secondary | Pre-KG-12 | 903 | 14.8 | Church of the Nazarene |
| Christbridge Academy | 15.0 |
Regular elementary or secondary | 2-12 | 69 | 5.8 | Christian (no specific denomination) |
| Carbon Canyon Christian School | 15.0 |
Regular elementary or secondary | 1-12 | 40 | 4.4 | Christian (no specific denomination) |
| Lighthouse Christian Academy | 15.2 |
Regular elementary or secondary | KG-12 | 85 | 9.7 | Pentecostal |
| La Sierra Academy | 15.3 |
Regular elementary or secondary | KG-12 | 819 | 20.5 | Seventh-Day Adventist |
| Ivy League School | 15.5 |
Regular elementary or secondary | 1-12 | 114 | 9.1 | Nonsectarian |
| Christian Heritage | 15.5 |
Alternative/other | KG-12 | 388 | 27.7 | Christian (no specific denomination) |
| Amor Christian Academy | 16.1 |
Regular elementary or secondary | 1-12 | 41 | 8.2 | Christian (no specific denomination) |
| Uhs Schools, Riverside Formerly Known As Keystone | 16.5 |
Special education | Ungraded-Ungraded | 185 | 10.3 | Nonsectarian |
| Corona Christian School | 16.6 |
Regular elementary or secondary | Pre-KG-12 | 15 | 7.9 | Christian (no specific denomination) |
| Mountainside Private School | 17.0 |
Regular elementary or secondary | 3-12 | 12 | 9.2 | Nonsectarian |
| Riverside Christian Schools | 17.4 |
Regular elementary or secondary | Pre-KG-12 | 921 | 19.3 | Christian (no specific denomination) |
| Grace Christian Academy | 17.6 |
Regular elementary or secondary | Pre-KG-12 | 197 | 14.1 | Baptist |
| Alpha & Omega Christian Academy | 17.8 |
Regular elementary or secondary | KG-12 | 13 | 6.5 | Pentecostal |
| Hope Christian | 18.4 |
Alternative/other | KG-12 | 61 | 1.9 | Christian (no specific denomination) |
| Temple Learning Center | 18.5 |
Regular elementary or secondary | Pre-KG-12 | 31 | 10.3 | Christian (no specific denomination) |
| Mid Valley Learning Centers Inc | 18.6 |
Special education | 5-12 | 43 | 10.8 | Nonsectarian |
| Vineyard Christian School | 18.7 |
Regular elementary or secondary | Pre-KG-12 | 329 | 17.0 | Christian (no specific denomination) |
| Big Springs Center & School | 18.9 |
Special education | Ungraded-Ungraded | 15 | 1.9 | Nonsectarian |
| Calvary Christian School | 19.0 |
Regular elementary or secondary | 6-12 | 7 | 3.5 | Pentecostal |
| Abc School-duarte | 19.1 |
Special education | Pre-KG-Pre-KG | 20 | 5.0 | Nonsectarian |
| Immanuel Baptist School | 19.4 |
Alternative/other | Pre-KG-12 | 66 | 13.8 | Baptist |
| Morning Star Christian School | 19.9 |
Regular elementary or secondary | KG-12 | 74 | 8.6 | Christian (no specific denomination) |
| Eastside Christian Schools | 20.0 |
Regular elementary or secondary | Pre-KG-12 | 410 | 12.3 | Christian (no specific denomination) |
| Gateway Education Center | 20.1 |
Regular elementary or secondary | KG-12 | 96 | 10.8 | Pentecostal |
| Hbic/the Cleta Harder Developmental School | 20.3 |
Special education | Ungraded-Ungraded | 30 | 7.5 | Nonsectarian |
| The Art House | 20.3 |
Alternative/other | Ungraded-Ungraded | 200 | 500.0 | Nonsectarian |
| Eagle Valley School | 20.4 |
Special education | 5-12 | 48 | 12.0 | Nonsectarian |
| Calvary Road Baptist Academy | 20.8 |
Regular elementary or secondary | KG-12 | 42 | 6.4 | Baptist |
| Orange Hills | 21.0 |
Regular elementary or secondary | Pre-KG-10 | 40 | 5.3 | Assembly of God |
| Alternative Educational Services | 21.0 |
Alternative/other | Ungraded-Ungraded | 15 | 6.5 | Nonsectarian |
| American Christian Military Academy | 21.1 |
Regular elementary or secondary | 5-12 | 47 | 9.6 | Christian (no specific denomination) |
| Committed Christian School | 21.3 |
Alternative/other | 1-12 | 68 | 5.7 | Christian (no specific denomination) |
| Rio Hondo Preparatory School | 21.4 |
Regular elementary or secondary | 6-12 | 197 | 10.2 | Nonsectarian |
| Pyramid Autism Center | 21.6 |
Special education | Ungraded-Ungraded | 19 | 4.8 | Nonsectarian |
| Somerset Educational Services | 22.1 |
Special education | KG-12 | 216 | 12.0 | Nonsectarian |
| Loma Linda Academy | 22.3 |
Regular elementary or secondary | KG-12 | 1572 | 17.0 | Seventh-Day Adventist |
| Odell Young Alternative School | 22.7 |
Special education | 2-11 | 35 | 7.0 | Nonsectarian |
| Woodcrest Christian School System | 22.8 |
Regular elementary or secondary | KG-12 | 1104 | 21.2 | Christian (no specific denomination) |
| Eldorado School/emerson Honors | 23.0 |
Special program emphasis | Pre-KG-12 | 167 | 8.6 | Nonsectarian |
| Faith Christian Academy Of The Cma | 23.2 |
Regular elementary or secondary | KG-12 | 29 | 8.5 | Christian (no specific denomination) |
| Abc Hope For Kids | 23.2 |
Special education | Pre-KG-12 | 28 | 9.3 | Nonsectarian |
| Remnant Christian School | 23.7 |
Regular elementary or secondary | 3-9 | 13 | 2.7 | Christian (no specific denomination) |
| La Palma Preschool And Kindergarten | 24.0 |
Montessori | Ungraded-Ungraded | 15 | 5.0 | Nonsectarian |
| Saints Of Glory School | 24.2 |
Regular elementary or secondary | KG-12 | 25 | 4.3 | Christian (no specific denomination) |
| The Eirich | 24.5 |
Regular elementary or secondary | 1-11 | 7 | 3.7 | Nonsectarian |
| Benchmark Young Adult School | 24.5 |
Alternative/other | Ungraded-Ungraded | 50 | 12.5 | Nonsectarian |
| San Gabriel Academy | 24.6 |
Regular elementary or secondary | KG-12 | 421 | 14.7 | Seventh-Day Adventist |
| Montessori In Redlands Inc | 24.9 |
Montessori | Pre-KG-9 | 164 | 9.7 | Nonsectarian |
| Cornerstone Fellowship Academy | 24.9 |
Regular elementary or secondary | 1-10 | 16 | 1.8 | Christian (no specific denomination) |
| California Ranch School | 25.0 |
Regular elementary or secondary | 1-12 | 12 | 10.9 | Nonsectarian |
