| Clearlake Sda Christian School | 14.7 |
Regular elementary or secondary | KG-8 | 18 | 9.0 | Seventh-Day Adventist |
| Pacific Union College Elementary School | 15.7 |
Regular elementary or secondary | KG-8 | 128 | 13.8 | Seventh-Day Adventist |
| Foothills Adventist Elementary School | 16.4 |
Regular elementary or secondary | Pre-KG-8 | 86 | 12.3 | Seventh-Day Adventist |
| Windsor Christian Academy | 16.7 |
Regular elementary or secondary | Pre-KG-8 | 179 | 14.6 | Baptist |
| Sonoma Country Day School | 18.1 |
Regular elementary or secondary | KG-8 | 263 | 11.6 | Nonsectarian |
| St Rose Elementary School | 18.5 |
Regular elementary or secondary | KG-8 | 344 | 25.5 | Roman Catholic |
| St Helena Catholic School | 18.5 |
Regular elementary or secondary | KG-8 | 90 | 11.4 | Roman Catholic |
| St Helen Montessori School | 18.6 |
Montessori | Pre-KG-6 | 50 | 6.4 | Roman Catholic |
| The Young School | 18.6 |
Montessori | Trans. 1-6 | 40 | 10.0 | Nonsectarian |
| Bethlehem Children's Center & Kindergarten | 19.0 |
Early childhood program/child care center | Pre-KG-KG | 33 | 9.2 | Evangelical Lutheran Church in America |
| Brush Creek Montessori | 19.3 |
Montessori | Pre-KG-4 | 28 | 5.0 | Nonsectarian |
| St Eugene Cathedral School | 20.6 |
Regular elementary or secondary | Pre-KG-8 | 350 | 27.1 | Roman Catholic |
| St Luke Lutheran School | 20.9 |
Regular elementary or secondary | Pre-KG-8 | 83 | 13.6 | Lutheran Church - Missouri Synod |
| Countryside Preschool And Kindergarten | 21.2 |
Early childhood program/child care center | Pre-KG-KG | 7 | 6.4 | Christian (no specific denomination) |
| Cloverdale Seventh-day Adventist School | 21.3 |
Regular elementary or secondary | 1-8 | 17 | 8.5 | Seventh-Day Adventist |
| Woodside West Elementary School | 21.6 |
Regular elementary or secondary | Pre-KG-1 | 12 | 1.9 | Nonsectarian |
| College Oak Montessori School | 21.6 |
Montessori | Pre-KG-KG | 8 | 2.0 | Nonsectarian |
| Merryhill School | 22.5 |
Regular elementary or secondary | KG-5 | 87 | 9.1 | Nonsectarian |
| St Michael's Orthodox School | 22.7 |
Alternative/other | Trans. 1-8 | 13 | 4.3 | Greek Orthodox |
