| Hms Richards Adventist School | 0.0 |
Regular elementary or secondary | Pre-KG-8 | 35 | 8.8 | Seventh-Day Adventist |
| 5th Street College Of Berthoud | 3.2 |
Regular elementary or secondary | Pre-KG-1 | 10 | 6.2 | Nonsectarian |
| Immanuel Lutheran School | 3.9 |
Regular elementary or secondary | Pre-KG-8 | 217 | 15.7 | Lutheran Church - Missouri Synod |
| St John The Evangelist Catholic School | 4.0 |
Regular elementary or secondary | Pre-KG-8 | 245 | 10.7 | Roman Catholic |
| Seven Oaks Academy/bright Horizons | 4.0 |
Early childhood program/child care center | Pre-KG-KG | 30 | 2.6 | Nonsectarian |
| Children's Workshop | 6.2 |
Early childhood program/child care center | Pre-KG-KG | 15 | 3.8 | Nonsectarian |
| Discovery Montessori L'ecole Sans Murs | 10.6 |
Montessori | Pre-KG-6 | 14 | 10.0 | Nonsectarian |
| Our Saviors Lutheran School | 11.2 |
Regular elementary or secondary | KG-8 | 15 | 5.0 | Wisconsin Evangelical Lutheran Synod |
| Aspen Christian School | 11.4 |
Regular elementary or secondary | 1-7 | 11 | 7.3 | Seventh-Day Adventist |
| Scribbles Academy | 11.4 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Messiah Lutheran School | 11.7 |
Regular elementary or secondary | Pre-KG-6 | 59 | 6.2 | Lutheran Church - Missouri Synod |
| Kindercare Learning Center #1650 | 12.1 |
Regular elementary or secondary | Pre-KG-5 | 92 | 92.0 | Nonsectarian |
| Bright Horizons East Longmont | 12.1 |
Early childhood program/child care center | Pre-KG-KG | 19 | 19.0 | Nonsectarian |
| Gateway Montessori School | 12.3 |
Montessori | Pre-KG-KG | 16 | 8.9 | Nonsectarian |
| Bright Horizons Family Solutions | 13.1 |
Early childhood program/child care center | Pre-KG-KG | 20 | 8.0 | Nonsectarian |
| Lyons Community Montessori | 13.2 |
Montessori | Pre-KG-KG | 10 | 4.3 | Nonsectarian |
| Kindercare Learning Center | 13.3 |
Early childhood program/child care center | Pre-KG-KG | 11 | 11.0 | Nonsectarian |
| Bright Horizons - West Longmont | 14.0 |
Early childhood program/child care center | Pre-KG-KG | 18 | 16.4 | Nonsectarian |
| Mountain Peak Private School | 14.3 |
Regular elementary or secondary | Pre-KG-5 | 46 | 7.7 | Nonsectarian |
| St Stephen's Christian School | 14.3 |
Early childhood program/child care center | Pre-KG-Trans. KG | 35 | 6.0 | Episcopal |
| Spring Creek School | 14.7 |
Early childhood program/child care center | Pre-KG-KG | 11 | 11.0 | Nonsectarian |
| Beebe Christian School | 15.2 |
Regular elementary or secondary | KG-8 | 17 | 10.6 | Seventh-Day Adventist |
| Rivendell Schoo Of Northern Colorado | 15.2 |
Montessori | Pre-KG-6 | 151 | 11.8 | Nonsectarian |
| Hearts In Hand Child Development Center | 15.5 |
Early childhood program/child care center | Pre-KG-Trans. KG | 15 | 6.5 | Nonsectarian |
| Mountain View Academy | 16.4 |
Regular elementary or secondary | Pre-KG-8 | 60 | 5.7 | Nonsectarian |
| Oakwood School | 16.5 |
Regular elementary or secondary | Pre-KG-6 | 49 | 9.1 | Nonsectarian |
| Children's House Montessori School | 16.5 |
Montessori | Pre-KG-Trans. KG | 15 | 3.8 | Nonsectarian |
| Rocky Mountain Christian Academy | 17.3 |
Regular elementary or secondary | Pre-KG-8 | 321 | 14.7 | Christian (no specific denomination) |
| Shepherd Of The Hills Lutheran School | 18.3 |
Regular elementary or secondary | Pre-KG-5 | 22 | 7.6 | Wisconsin Evangelical Lutheran Synod |
| Trinity Lutheran School | 18.5 |
Regular elementary or secondary | KG-8 | 60 | 10.7 | Lutheran Church - Missouri Synod |
| Shepherd Valley Waldorf School | 18.7 |
Special program emphasis | Pre-KG-8 | 107 | 6.6 | Nonsectarian |
| Boulder Jewish Day School | 19.9 |
Regular elementary or secondary | Pre-KG-5 | 33 | 9.2 | Jewish |
| Adventist Christian School | 20.0 |
Regular elementary or secondary | KG-8 | 37 | 9.7 | Seventh-Day Adventist |
| Rocky Mountain School For The Gifted & Creative | 20.0 |
Special program emphasis | Pre-KG-8 | 73 | 5.2 | Nonsectarian |
| Boulder Country Day | 20.9 |
Regular elementary or secondary | Pre-KG-8 | 252 | 9.0 | Nonsectarian |
| Children's House Of Weld County | 21.2 |
Montessori | Pre-KG-KG | 4 | 4.0 | Nonsectarian |
| Mountain Shadows Montessori School | 21.8 |
Montessori | Pre-KG-6 | 87 | 14.5 | Nonsectarian |
| Running River School | 23.4 |
Regular elementary or secondary | KG-6 | 26 | 5.8 | Nonsectarian |
| Running River School | 23.4 |
Special program emphasis | KG-6 | 22 | 5.1 | Nonsectarian |
| Jarrow Montessori School | 23.6 |
Montessori | Pre-KG-6 | 51 | 8.5 | Nonsectarian |
| Blue Sky Kindergarten | 24.5 |
Early childhood program/child care center | Pre-KG-KG | 3 | 1.6 | Nonsectarian |
| Mt Zion Lutheran School | 24.5 |
Regular elementary or secondary | Pre-KG-5 | 24 | 7.7 | Lutheran Church - Missouri Synod |
| Friends' School | 24.9 |
Regular elementary or secondary | Pre-KG-5 | 113 | 11.8 | Nonsectarian |
| Sacred Heart Of Jesus | 25.0 |
Regular elementary or secondary | Pre-KG-8 | 325 | 12.8 | Roman Catholic |
