| Life Covenant Christian Academy | 1.5 |
Regular elementary or secondary | KG-8 | 54 | 13.2 | Christian (no specific denomination) |
| Resurrection Academy | 1.7 |
Regular elementary or secondary | Pre-KG-8 | 201 | 19.0 | Roman Catholic |
| Mountain View Christian Preschool & Kindergarten | 1.7 |
Early childhood program/child care center | KG-KG | 24 | 5.0 | Baptist |
| Peace In The Valley Academy | 1.8 |
Regular elementary or secondary | KG-8 | 39 | 13.4 | Christian (no specific denomination) |
| Montessori Child Development Center | 3.1 |
Montessori | Pre-KG-3 | 45 | 9.2 | Nonsectarian |
| Water Of Life Christian School | 3.6 |
Regular elementary or secondary | Pre-KG-5 | 166 | 15.2 | Christian (no specific denomination) |
| Sacred Heart Parish School | 4.3 |
Regular elementary or secondary | KG-8 | 282 | 24.5 | Roman Catholic |
| Cross And Crown Lutheran School | 4.4 |
Regular elementary or secondary | KG-2 | 13 | 6.5 | Evangelical Lutheran Church in America |
| Valley Fellowship Resource Center | 4.9 |
Regular elementary or secondary | 1-8 | 29 | 14.5 | Seventh-Day Adventist |
| St Catherine Of Siena School | 5.0 |
Regular elementary or secondary | Pre-KG-8 | 162 | 16.0 | Roman Catholic |
| Bethany Christian Learning Center | 5.0 |
Early childhood program/child care center | Pre-KG-KG | 11 | 11.0 | Christian (no specific denomination) |
| Kindercare | 5.7 |
Early childhood program/child care center | Pre-KG-Trans. KG | 12 | 12.0 | Nonsectarian |
| Cottonwood Montessori | 6.8 |
Montessori | Pre-KG-KG | 15 | 7.5 | Nonsectarian |
| Jumpstart Learning Center Inc | 7.5 |
Early childhood program/child care center | Pre-KG-KG | 4 | 4.0 | Nonsectarian |
| Kinder Care Learning Center | 7.6 |
Early childhood program/child care center | Pre-KG-KG | 7 | 7.0 | Nonsectarian |
| Life Christian Academy | 7.8 |
Regular elementary or secondary | Pre-KG-6 | 49 | 12.2 | Christian (no specific denomination) |
| St Anthony School | 7.9 |
Regular elementary or secondary | KG-8 | 236 | 20.0 | Roman Catholic |
| Alta Loma Christian School | 7.9 |
Regular elementary or secondary | Pre-KG-8 | 195 | 19.5 | Brethren |
| Montessori School House | 8.2 |
Montessori | Pre-KG-1 | 16 | 5.7 | Nonsectarian |
| Rancho Heritage School | 8.6 |
Regular elementary or secondary | Pre-KG-5 | 61 | 10.2 | Nonsectarian |
| La Petite Academy | 9.0 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Nonsectarian |
| Kids Club Llc | 9.2 |
Early childhood program/child care center | Pre-KG-KG | 13 | 2.2 | Nonsectarian |
| San Bernardino Christian School | 9.2 |
Regular elementary or secondary | KG-6 | 92 | 12.1 | Christian (no specific denomination) |
| St Peter & St Paul School | 9.2 |
Early childhood program/child care center | Pre-KG-KG | 14 | 8.8 | Roman Catholic |
| Holy Rosary Academy | 9.6 |
Regular elementary or secondary | KG-8 | 154 | 17.1 | Roman Catholic |
| Children's Montessori School | 9.6 |
Montessori | Pre-KG-3 | 18 | 3.3 | Nonsectarian |
| Congregation Emanu El Clare Cherry School | 9.7 |
Regular elementary or secondary | Pre-KG-5 | 67 | 8.8 | Nonsectarian |
| Valley Christian School | 9.7 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Church of the Nazarene |
| Ontario Christian Academy | 9.7 |
Alternative/other | 1-5 | 4 | 4.0 | Christian (no specific denomination) |
| Kindercare Learning Center | 9.7 |
Early childhood program/child care center | KG-KG | 15 | 7.5 | Nonsectarian |
| Our Lady Of The Assumption | 9.8 |
Regular elementary or secondary | KG-8 | 222 | 20.9 | Roman Catholic |
| St Francis De Sales School | 10.1 |
Regular elementary or secondary | Pre-KG-8 | 311 | 34.6 | Roman Catholic |
| Northpark Christian Academy | 10.2 |
Regular elementary or secondary | Pre-KG-2 | 11 | 11.0 | Christian (no specific denomination) |
| North Point Christian Academy & Preschool | 10.2 |
Regular elementary or secondary | Pre-KG-6 | 79 | 9.9 | Baptist |
| Teddy Bear Tymes #2 | 10.7 |
Early childhood program/child care center | Pre-KG-KG | 8 | 4.0 | Nonsectarian |
| St Joseph School | 10.8 |
Regular elementary or secondary | KG-8 | 341 | 24.7 | Roman Catholic |
| La Petite Academy | 10.9 |
Early childhood program/child care center | Pre-KG-KG | 14 | 14.0 | Nonsectarian |
| Riverside Garden School | 11.1 |
Regular elementary or secondary | KG-6 | 115 | 13.4 | Nonsectarian |
| Montessori Academy | 11.1 |
Montessori | Pre-KG-3 | 21 | 10.5 | Nonsectarian |
| Islamic Academy Of Riverside | 11.1 |
Regular elementary or secondary | Pre-KG-8 | 46 | 6.6 | Islamic |
| Harvest Christian School | 11.1 |
Regular elementary or secondary | Pre-KG-6 | 403 | 17.5 | Christian (no specific denomination) |
| St Mark's Episcopal School | 11.1 |
Regular elementary or secondary | KG-8 | 177 | 12.0 | Episcopal |
| Montessori Academy | 11.2 |
Montessori | Pre-KG-6 | 9 | 3.0 | Nonsectarian |
| Kids Of America | 11.6 |
Montessori | KG-KG | 3 | 3.0 | Nonsectarian |
| Taft T Newman Christian | 11.6 |
Regular elementary or secondary | Pre-KG-8 | 17 | 5.7 | Christian (no specific denomination) |
| First United Methodist Preschool & Kindergarten | 11.6 |
Early childhood program/child care center | Pre-KG-KG | 8 | 5.7 | Methodist |
| Temple Beth El Child Development Center | 11.6 |
Early childhood program/child care center | Pre-KG-Trans. KG | 33 | 16.5 | Nonsectarian |
| St Catherine Of Alexandria School | 11.6 |
Regular elementary or secondary | KG-8 | 321 | 19.0 | Roman Catholic |
| Riverside Christian Middle School | 11.6 |
Regular elementary or secondary | 6-8 | 234 | 18.6 | Christian (no specific denomination) |
| Del Rosa Christian School | 11.7 |
Regular elementary or secondary | Pre-KG-6 | 92 | 5.3 | Baptist |
| Loma Linda Children's Center | 11.8 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Seventh-Day Adventist |
| St George Parish School | 11.9 |
Regular elementary or secondary | Pre-KG-8 | 242 | 19.2 | Roman Catholic |
| Immanuel Lutheran Schools | 11.9 |
Regular elementary or secondary | Pre-KG-6 | 118 | 13.7 | Lutheran Church - Missouri Synod |
| Pacific Christian School | 11.9 |
Regular elementary or secondary | KG-4 | 46 | 8.5 | Brethren |
| Carden Arbor View School | 12.0 |
Regular elementary or secondary | KG-8 | 175 | 10.5 | Nonsectarian |
| Apple Tree Learning Center | 12.0 |
Early childhood program/child care center | Pre-KG-KG | 9 | 8.2 | Christian (no specific denomination) |
| Mount Zion Christian School | 12.0 |
Early childhood program/child care center | Pre-KG-KG | 8 | 4.0 | Christian (no specific denomination) |
| Riverside Montessori Academy | 12.0 |
Montessori | Pre-KG-4 | 40 | 13.3 | Nonsectarian |
| Ontario Progressive Montessori School | 12.2 |
Montessori | KG-1 | 17 | 5.7 | Nonsectarian |
| Mountain Green Preschool & Child Care | 12.3 |
Early childhood program/child care center | KG-Trans. KG | 54 | 18.6 | Methodist |
| Ontario Christian School | 12.3 |
Regular elementary or secondary | Pre-KG-8 | 894 | 14.4 | Calvinist |
| Learning Bee Montessori Academy | 12.3 |
Montessori | Pre-KG-1 | 17 | 2.4 | Nonsectarian |
| Learning Bee Montessori Academy | 12.3 |
Montessori | Pre-KG-4 | 9 | 2.0 | Nonsectarian |
| Redeemer Lutheran Christian School | 12.3 |
Regular elementary or secondary | KG-8 | 141 | 16.4 | Lutheran Church - Missouri Synod |
| Kindercare Learning Center | 12.7 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Town And Country Day School | 12.8 |
Early childhood program/child care center | Pre-KG-KG | 16 | 6.7 | Nonsectarian |
| Banner Elementary | 12.8 |
Regular elementary or secondary | KG-6 | 252 | 19.4 | Christian (no specific denomination) |
| New Life Christian School | 13.1 |
Regular elementary or secondary | KG-8 | 136 | 14.6 | Christian (no specific denomination) |
| Mulberry Childcare & Preschool | 13.2 |
Early childhood program/child care center | Pre-KG-KG | 9 | 9.0 | Nonsectarian |
| Church On The Hill Christian Child Care Center | 13.3 |
Early childhood program/child care center | KG-KG | 23 | 11.5 | Other |
| Cottonwood Montessori | 13.3 |
Montessori | Pre-KG-KG | 10 | 5.0 | Nonsectarian |
| La Petite Academy | 13.6 |
Early childhood program/child care center | Pre-KG-KG | 14 | 14.0 | Nonsectarian |
| Montessori Childrens House | 13.6 |
Montessori | Pre-KG-2 | 17 | 5.7 | Nonsectarian |
| Hawarden Hills Academy | 13.7 |
Special program emphasis | KG-8 | 378 | 19.5 | Nonsectarian |
| Our Lady Of Lourdes School | 13.8 |
Regular elementary or secondary | KG-8 | 211 | 26.4 | Roman Catholic |
| Crosspoint Children's Center | 13.8 |
Early childhood program/child care center | Pre-KG-KG | 17 | 8.5 | Calvinist |
| Taft Child Dev Centers | 14.1 |
Regular elementary or secondary | Pre-KG-6 | 38 | 12.7 | Nonsectarian |
| Christ Lutheran School & Daycare | 14.1 |
Early childhood program/child care center | Pre-KG-Trans. KG | 3 | 0.3 | Evangelical Lutheran Church in America |
| International Montessori School | 14.1 |
Montessori | Pre-KG-5 | 29 | 4.2 | Nonsectarian |
| Western Christian School | 14.2 |
Regular elementary or secondary | Pre-KG-8 | 384 | 14.2 | Christian (no specific denomination) |
| St Adelaide Elem School | 14.2 |
Regular elementary or secondary | KG-8 | 178 | 21.4 | Roman Catholic |
| Children's School At Claremont Mckenna College | 14.4 |
Regular elementary or secondary | Pre-KG-3 | 25 | 6.2 | Nonsectarian |
| Kiddie Academy | 14.4 |
Early childhood program/child care center | Pre-KG-KG | 10 | 5.3 | Nonsectarian |
| Kiddie Korner | 14.5 |
Early childhood program/child care center | Pre-KG-KG | 15 | 11.5 | Baptist |
| Montclair Christian Elementary | 14.7 |
Regular elementary or secondary | Pre-KG-6 | 38 | 7.6 | Assembly of God |
| St Margaret Mary School | 14.8 |
Regular elementary or secondary | Pre-KG-8 | 275 | 21.5 | Roman Catholic |
| Redlands Playschool, Westside Christian Church | 15.0 |
Regular elementary or secondary | Pre-KG-6 | 96 | 12.0 | Christian (no specific denomination) |
| Countrywood Elementary School | 15.2 |
Regular elementary or secondary | Pre-KG-8 | 51 | 10.2 | Nonsectarian |
| Kindercare Learning Center | 15.2 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Bethany Child Care Center | 15.3 |
Early childhood program/child care center | Pre-KG-KG | 4 | 4.0 | Christian (no specific denomination) |
| Countryside Montessori Center | 15.5 |
Montessori | Pre-KG-1 | 24 | 12.0 | Nonsectarian |
| Our Lady Of The Assumption School | 15.5 |
Regular elementary or secondary | KG-8 | 469 | 21.2 | Roman Catholic |
| Lacc Children's House | 15.5 |
Early childhood program/child care center | Pre-KG-KG | 1 | 1.0 | Other |
| First Lutheran Childrens Center | 15.7 |
Early childhood program/child care center | Pre-KG-Trans. KG | 9 | 15.0 | Evangelical Lutheran Church in America |
| Sacred Heart Academy | 15.9 |
Regular elementary or secondary | KG-8 | 255 | 16.4 | Roman Catholic |
| Magnolia Preschool And Kindergarten | 16.0 |
Regular elementary or secondary | Pre-KG-1 | 15 | 15.0 | Nonsectarian |
| New Hope Christian Schools | 16.0 |
Regular elementary or secondary | Pre-KG-6 | 100 | 13.3 | Methodist |
| Kindercare | 16.1 |
Regular elementary or secondary | Pre-KG-6 | 50 | 7.3 | Nonsectarian |
| Woodcrest Montessori Education Center | 16.2 |
Montessori | Pre-KG-KG | 4 | 2.0 | Nonsectarian |
| Redlands Christian School | 16.2 |
Regular elementary or secondary | Pre-KG-8 | 459 | 14.9 | Christian (no specific denomination) |
| Chino Valley Christian Schools | 16.2 |
Regular elementary or secondary | Pre-KG-8 | 280 | 10.0 | Christian (no specific denomination) |
| Foothill Country Day School | 16.2 |
Regular elementary or secondary | KG-8 | 180 | 8.8 | Nonsectarian |
| Target Community Schools | 16.3 |
Special education | 4-8 | 8 | 4.0 | Nonsectarian |
| St Madeleine School | 16.3 |
Regular elementary or secondary | KG-8 | 177 | 17.5 | Roman Catholic |
| Cornerstone Christian School | 16.3 |
Regular elementary or secondary | Pre-KG-6 | 91 | 13.0 | Church of the Nazarene |
| Ahrens Child Care Center | 16.7 |
Early childhood program/child care center | Pre-KG-KG | 17 | 17.0 | Nonsectarian |
| Childtime Learning Center | 16.8 |
Early childhood program/child care center | Pre-KG-KG | 22 | 11.0 | Nonsectarian |
| Shepherd Of The Valley School | 16.8 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Lutheran Church - Missouri Synod |
| Hillview Acres School Inc | 16.9 |
Special education | 3-8 | 8 | 4.0 | Nonsectarian |
| Icc Community | 17.0 |
Regular elementary or secondary | KG-6 | 93 | 10.6 | Islamic |
| Childrens World Learning Center | 17.1 |
Early childhood program/child care center | Pre-KG-KG | 4 | 4.0 | Nonsectarian |
| Valley Adventist Christian School | 17.1 |
Regular elementary or secondary | KG-8 | 41 | 13.7 | Seventh-Day Adventist |
| Kindercare Learning Center | 17.1 |
Early childhood program/child care center | Pre-KG-KG | 18 | 11.2 | Nonsectarian |
| Montessori School Of Chino Hills | 17.2 |
Montessori | Pre-KG-1 | 12 | 6.0 | Nonsectarian |
| St Edward School | 17.3 |
Regular elementary or secondary | Pre-KG-8 | 425 | 19.3 | Roman Catholic |
| First Christian Church Child Dev Ctr | 17.3 |
Regular elementary or secondary | Pre-KG-2 | 15 | 15.0 | Christian (no specific denomination) |
| Montessori Academy Of Corona | 17.7 |
Montessori | Pre-KG-KG | 12 | 12.0 | Nonsectarian |
| Christ The King Lutheran Preschool & Kdgn | 17.7 |
Early childhood program/child care center | Pre-KG-KG | 18 | 1.6 | Lutheran Church - Missouri Synod |
| Valley Preparatory School | 17.8 |
Regular elementary or secondary | Pre-KG-8 | 170 | 5.9 | Nonsectarian |
| Sunnymead Montessori School | 18.1 |
Montessori | Pre-KG-1 | 19 | 9.5 | Nonsectarian |
| Loving Savior Of The Hills Lutheran School | 18.1 |
Regular elementary or secondary | Pre-KG-8 | 178 | 15.3 | Lutheran Church - Missouri Synod |
| St Joseph Elementary School | 18.4 |
Regular elementary or secondary | KG-8 | 244 | 21.4 | Roman Catholic |
| Grace Lutheran School | 18.4 |
Regular elementary or secondary | KG-8 | 75 | 13.6 | Lutheran Church - Missouri Synod |
| Chino Hills Christian School | 18.5 |
Regular elementary or secondary | KG-6 | 222 | 22.2 | Christian (no specific denomination) |
| Montessori School Of Corona | 18.6 |
Montessori | Pre-KG-8 | 123 | 12.3 | Nonsectarian |
| Crossroads Christian Schools | 18.7 |
Regular elementary or secondary | Pre-KG-8 | 547 | 22.3 | Christian (no specific denomination) |
| Moreno Valley Christian School | 18.8 |
Regular elementary or secondary | KG-8 | 144 | 14.4 | Baptist |
| Good Earth Montessori School | 18.8 |
Montessori | Pre-KG-KG | 24 | 12.0 | Nonsectarian |
| Montessori Academy Of Phillips Ranch | 19.0 |
Montessori | Pre-KG-KG | 6 | 2.3 | Nonsectarian |
| Childrens Montessori Center | 19.0 |
Montessori | Pre-KG-1 | 14 | 4.0 | Nonsectarian |
| Olive Branch Christian Academy | 19.2 |
Regular elementary or secondary | Pre-KG-8 | 155 | 15.3 | Christian (no specific denomination) |
| Calvary Chapel Christian Academy | 19.3 |
Regular elementary or secondary | KG-6 | 54 | 13.5 | Other |
| Foothill Montessori School | 19.6 |
Montessori | Pre-KG-3 | 37 | 12.3 | Nonsectarian |
| Foothill Montessori | 19.6 |
Montessori | Pre-KG-3 | 33 | 16.5 | Nonsectarian |
| Valley Christian Academy | 19.7 |
Regular elementary or secondary | Pre-KG-8 | 141 | 15.7 | Brethren |
| Kindercare Learning Center | 19.9 |
Early childhood program/child care center | Pre-KG-KG | 7 | 7.0 | Nonsectarian |
| Just-4-kids Preschool | 20.5 |
Early childhood program/child care center | Pre-KG-KG | 13 | 13.0 | Nonsectarian |
| Diamond Bar Montessori Academy | 21.2 |
Montessori | Pre-KG-3 | 9 | 1.0 | Nonsectarian |
| Arrow Montessori School Of San | 21.3 |
Montessori | Pre-KG-8 | 106 | 10.1 | Nonsectarian |
| Village Montessori Academy | 21.4 |
Montessori | Pre-KG-KG | 26 | 13.0 | Nonsectarian |
| Mt Calvary Lutheran School | 21.5 |
Regular elementary or secondary | Pre-KG-8 | 190 | 18.8 | Lutheran Church - Missouri Synod |
| Childrens Montessori Center Of Via Verde | 21.8 |
Montessori | Pre-KG-1 | 27 | 7.1 | Nonsectarian |
| Sonrise Christian School-san Dimas | 21.9 |
Regular elementary or secondary | Pre-KG-5 | 119 | 18.0 | Christian (no specific denomination) |
| St Dorothy Elementary School | 22.1 |
Regular elementary or secondary | KG-8 | 281 | 21.6 | Roman Catholic |
| La Petite Academy | 22.2 |
Early childhood program/child care center | KG-Trans. KG | 30 | 30.0 | Nonsectarian |
| Kindercare Learning Center | 22.6 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Nonsectarian |
| Hope Lutheran Elem School | 22.7 |
Regular elementary or secondary | Pre-KG-8 | 139 | 8.7 | Lutheran Church - Missouri Synod |
| St Louise De Marillac School | 23.0 |
Regular elementary or secondary | KG-8 | 311 | 28.0 | Roman Catholic |
| St Francis Of Assisi School | 23.0 |
Regular elementary or secondary | Pre-KG-8 | 509 | 18.9 | Roman Catholic |
| Kindergarten Ranch School | 23.1 |
Special program emphasis | Pre-KG-3 | 9 | 2.7 | Christian (no specific denomination) |
| Kid Junction | 23.2 |
Early childhood program/child care center | Pre-KG-KG | 16 | 8.0 | Christian (no specific denomination) |
| Dbc Children's Center | 23.2 |
Early childhood program/child care center | Pre-KG-KG | 10 | 10.0 | Church of Christ |
| Hillsborough School | 23.6 |
Regular elementary or secondary | Pre-KG-8 | 125 | 8.9 | Nonsectarian |
| The Cross Christian School | 23.6 |
Regular elementary or secondary | Pre-KG-3 | 51 | 4.7 | Christian (no specific denomination) |
| Sonrise Christian School | 23.7 |
Regular elementary or secondary | Pre-KG-8 | 464 | 19.9 | Church of Christ |
| Sonrise Christian School | 23.7 |
Regular elementary or secondary | KG-8 | 463 | 20.5 | Church of Christ |
| Discovery World Montessori | 23.7 |
Montessori | Pre-KG-2 | 25 | 25.0 | Nonsectarian |
| American Future Learning Center | 23.7 |
Alternative/other | Pre-KG-5 | 39 | 24.4 | Nonsectarian |
| Walnut United Methodist Preschool | 23.7 |
Early childhood program/child care center | Pre-KG-KG | 12 | 6.0 | Methodist |
| Foothill Christian School | 23.8 |
Regular elementary or secondary | KG-8 | 601 | 22.3 | Christian (no specific denomination) |
| Yucaipa Christian School | 23.8 |
Regular elementary or secondary | Pre-KG-6 | 171 | 15.1 | Baptist |
| West Covina Hills Adventist School | 24.0 |
Regular elementary or secondary | KG-8 | 54 | 12.6 | Seventh-Day Adventist |
| Cumorah Academy | 24.0 |
Regular elementary or secondary | Pre-KG-1 | 8 | 8.0 | Nonsectarian |
| Gateway Montessori School | 24.1 |
Montessori | Pre-KG-KG | 9 | 4.5 | Nonsectarian |
| New Life Christian Academy | 24.1 |
Regular elementary or secondary | Pre-KG-8 | 131 | 12.7 | Other |
| Covina Development Center | 24.1 |
Alternative/other | Pre-KG-KG | 12 | 6.0 | Nonsectarian |
| California Preschool & Kindergarten | 24.2 |
Early childhood program/child care center | Pre-KG-KG | 14 | 14.0 | Nonsectarian |
| Montessori School Of Diamond Bar | 24.4 |
Montessori | Pre-KG-KG | 12 | 4.3 | Nonsectarian |
| Walnut Valley Montessori School | 24.6 |
Montessori | Pre-KG-6 | 28 | 8.0 | Nonsectarian |
| Diamond Canyon Christian Preschool | 24.7 |
Early childhood program/child care center | Pre-KG-KG | 30 | 6.2 | Christian (no specific denomination) |
| Calvary Chapel Academy | 24.8 |
Regular elementary or secondary | Pre-KG-8 | 151 | 13.8 | Christian (no specific denomination) |
| Ready Set Grow Preschool And Kindergarten | 24.8 |
Early childhood program/child care center | Pre-KG-KG | 10 | 10.0 | Nonsectarian |
| Covina Gateway Montessori School | 24.8 |
Montessori | Pre-KG-KG | 2 | 2.0 | Nonsectarian |
| Covina Christian Preschool | 25.0 |
Early childhood program/child care center | Pre-KG-KG | 11 | 4.8 | Assembly of God |
| First Baptist Preschool | 25.0 |
Early childhood program/child care center | Pre-KG-Trans. KG | 23 | 1.8 | Baptist |
