| Mountain Peak Private School | 0.8 |
Regular elementary or secondary | Pre-KG-5 | 46 | 7.7 | Nonsectarian |
| Bright Horizons - West Longmont | 1.6 |
Early childhood program/child care center | Pre-KG-KG | 18 | 16.4 | Nonsectarian |
| Gateway Montessori School | 2.2 |
Montessori | Pre-KG-KG | 16 | 8.9 | Nonsectarian |
| Messiah Lutheran School | 2.7 |
Regular elementary or secondary | Pre-KG-6 | 59 | 6.2 | Lutheran Church - Missouri Synod |
| Scribbles Academy | 2.9 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Aspen Christian School | 2.9 |
Regular elementary or secondary | 1-7 | 11 | 7.3 | Seventh-Day Adventist |
| Bright Horizons East Longmont | 3.1 |
Early childhood program/child care center | Pre-KG-KG | 19 | 19.0 | Nonsectarian |
| Our Saviors Lutheran School | 3.1 |
Regular elementary or secondary | KG-8 | 15 | 5.0 | Wisconsin Evangelical Lutheran Synod |
| Rocky Mountain Christian Academy | 3.2 |
Regular elementary or secondary | Pre-KG-8 | 321 | 14.7 | Christian (no specific denomination) |
| Shepherd Valley Waldorf School | 5.5 |
Special program emphasis | Pre-KG-8 | 107 | 6.6 | Nonsectarian |
| Boulder Jewish Day School | 6.3 |
Regular elementary or secondary | Pre-KG-5 | 33 | 9.2 | Jewish |
| Rocky Mountain School For The Gifted & Creative | 6.9 |
Special program emphasis | Pre-KG-8 | 73 | 5.2 | Nonsectarian |
| Children's House Of Weld County | 7.4 |
Montessori | Pre-KG-KG | 4 | 4.0 | Nonsectarian |
| Boulder Country Day | 7.6 |
Regular elementary or secondary | Pre-KG-8 | 252 | 9.0 | Nonsectarian |
| Mountain Shadows Montessori School | 8.4 |
Montessori | Pre-KG-6 | 87 | 14.5 | Nonsectarian |
| Running River School | 9.1 |
Special program emphasis | KG-6 | 22 | 5.1 | Nonsectarian |
| Running River School | 9.1 |
Regular elementary or secondary | KG-6 | 26 | 5.8 | Nonsectarian |
| Lyons Community Montessori | 10.3 |
Montessori | Pre-KG-KG | 10 | 4.3 | Nonsectarian |
| Bright Horizons - Louisville | 10.8 |
Early childhood program/child care center | Pre-KG-KG | 25 | 9.6 | Nonsectarian |
| 5th Street College Of Berthoud | 11.1 |
Regular elementary or secondary | Pre-KG-1 | 10 | 6.2 | Nonsectarian |
| Friends' School | 11.4 |
Regular elementary or secondary | Pre-KG-5 | 113 | 11.8 | Nonsectarian |
| St Louis Catholic School | 11.5 |
Regular elementary or secondary | Pre-KG-8 | 211 | 15.6 | Roman Catholic |
| Fairview Montessori School | 11.6 |
Montessori | Pre-KG-KG | 5 | 5.0 | Nonsectarian |
| Jarrow Montessori School | 11.6 |
Montessori | Pre-KG-6 | 51 | 8.5 | Nonsectarian |
| Countryside Montessori School | 11.7 |
Montessori | Pre-KG-KG | 8 | 1.4 | Nonsectarian |
| Louisville Montessori School & Daycare Center | 11.9 |
Montessori | Pre-KG-Trans. KG | 18 | 6.0 | Nonsectarian |
| Mt Zion Lutheran School | 12.0 |
Regular elementary or secondary | Pre-KG-5 | 24 | 7.7 | Lutheran Church - Missouri Synod |
| Blue Sky Kindergarten | 12.2 |
Early childhood program/child care center | Pre-KG-KG | 3 | 1.6 | Nonsectarian |
| Sacred Heart Of Jesus | 12.4 |
Regular elementary or secondary | Pre-KG-8 | 325 | 12.8 | Roman Catholic |
| Kindercare Learning Center | 12.5 |
Early childhood program/child care center | Pre-KG-Trans. KG | 18 | 18.0 | Nonsectarian |
| Bixby School | 12.9 |
Regular elementary or secondary | Pre-KG-5 | 112 | 7.0 | Nonsectarian |
| Hms Richards Adventist School | 14.3 |
Regular elementary or secondary | Pre-KG-8 | 35 | 8.8 | Seventh-Day Adventist |
| Nativity Of Our Lord School | 15.3 |
Regular elementary or secondary | KG-8 | 485 | 20.2 | Roman Catholic |
| Broomfield Academy | 15.9 |
Special program emphasis | Pre-KG-5 | 45 | 4.1 | Nonsectarian |
| Beautiful Savior Lutheran School | 15.9 |
Regular elementary or secondary | Pre-KG-8 | 51 | 9.1 | Lutheran Church - Missouri Synod |
| The Academy Child Development Center-westminster | 17.0 |
Early childhood program/child care center | Pre-KG-KG | 23 | 8.2 | Nonsectarian |
| Eastlake Montessori School | 17.0 |
Montessori | Pre-KG-KG | 7 | 2.0 | Nonsectarian |
| Seven Oaks Academy At The Ranch Reserve | 17.3 |
Early childhood program/child care center | Pre-KG-KG | 7 | 7.0 | Nonsectarian |
| Kindercare Learning Center | 17.4 |
Alternative/other | Pre-KG-3 | 15 | 10.7 | Nonsectarian |
| Kindercare Learning Center | 17.6 |
Early childhood program/child care center | Pre-KG-KG | 9 | 9.0 | Nonsectarian |
| Lord Of Life Lutheran School | 17.8 |
Regular elementary or secondary | Pre-KG-8 | 56 | 12.2 | Wisconsin Evangelical Lutheran Synod |
| Seven Oaks Academy/bright Horizons | 18.0 |
Early childhood program/child care center | Pre-KG-KG | 30 | 2.6 | Nonsectarian |
| Immanuel Lutheran School | 18.0 |
Regular elementary or secondary | Pre-KG-8 | 217 | 15.7 | Lutheran Church - Missouri Synod |
| St John The Evangelist Catholic School | 18.1 |
Regular elementary or secondary | Pre-KG-8 | 245 | 10.7 | Roman Catholic |
| Step By Step Child Development Center | 18.5 |
Early childhood program/child care center | Pre-KG-KG | 6 | 6.0 | Nonsectarian |
| Brighton Montessori School | 18.8 |
Montessori | Pre-KG-Trans. KG | 6 | 1.7 | Nonsectarian |
| Gethsemane Lutheran School | 18.8 |
Regular elementary or secondary | Pre-KG-8 | 100 | 12.5 | Lutheran Church - Missouri Synod |
| Zion Lutheran School | 19.5 |
Regular elementary or secondary | Pre-KG-8 | 255 | 18.4 | Lutheran Church - Missouri Synod |
| Shepherd Of The Valley Lutheran School | 19.8 |
Regular elementary or secondary | Pre-KG-8 | 58 | 14.5 | Wisconsin Evangelical Lutheran Synod |
| Children's Workshop | 20.5 |
Early childhood program/child care center | Pre-KG-KG | 15 | 3.8 | Nonsectarian |
| A Child's Touch | 20.9 |
Early childhood program/child care center | Pre-KG-KG | 44 | 12.9 | Christian (no specific denomination) |
| Childrens Outreach Project | 21.5 |
Early childhood program/child care center | Pre-KG-Trans. KG | 14 | 4.2 | Nonsectarian |
| Holy Trinity Catholic School | 21.8 |
Regular elementary or secondary | Pre-KG-8 | 242 | 14.7 | Roman Catholic |
| Assumption Catholic School | 22.5 |
Regular elementary or secondary | Pre-KG-8 | 132 | 10.9 | Roman Catholic |
| Primrose School Of West Woods | 23.2 |
Early childhood program/child care center | Pre-KG-KG | 24 | 24.0 | Nonsectarian |
| St Joan Of Arc Early Learning Center | 23.7 |
Early childhood program/child care center | Pre-KG-Trans. KG | 72 | 45.0 | Roman Catholic |
| Shrine Of St Anne School | 23.7 |
Regular elementary or secondary | KG-8 | 394 | 19.4 | Roman Catholic |
| A Childs Reflection Day Care | 23.8 |
Early childhood program/child care center | Pre-KG-KG | 3 | 1.0 | Christian (no specific denomination) |
| Discovery Montessori L'ecole Sans Murs | 24.9 |
Montessori | Pre-KG-6 | 14 | 10.0 | Nonsectarian |
| Guardian Angels | 24.9 |
Regular elementary or secondary | Pre-KG-8 | 147 | 11.8 | Roman Catholic |
| Cornerstone Montessori School | 25.0 |
Montessori | Pre-KG-KG | 21 | 1.5 | Nonsectarian |
