| Katy Adventist Christian School | 12.7 |
Regular elementary or secondary | 3-8 | 2 | 2.0 | Seventh-Day Adventist |
| Holy Rosary Catholic School | 12.8 |
Regular elementary or secondary | Pre-KG-8 | 205 | 11.4 | Roman Catholic |
| Childrens Lighthouse Learning Center | 13.2 |
Early childhood program/child care center | Pre-KG-KG | 15 | 15.0 | Nonsectarian |
| Montessori House For Children | 14.3 |
Montessori | Pre-KG-KG | 15 | 3.8 | Nonsectarian |
| St John's Methodist School For Little Children | 14.5 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Methodist |
| Shady Oak Christian School | 14.5 |
Regular elementary or secondary | Pre-KG-3 | 41 | 12.1 | Christian (no specific denomination) |
| Living Water Christian School | 15.1 |
Regular elementary or secondary | Pre-KG-6 | 51 | 8.6 | Christian (no specific denomination) |
| Innovative Montessori School - Katy | 15.3 |
Montessori | KG-KG | 4 | 2.0 | Nonsectarian |
| Primrose School Of Kelliwood | 15.5 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Nonsectarian |
| Primrose School Of North Mason Creek | 16.0 |
Early childhood program/child care center | Pre-KG-KG | 16 | 8.0 | Nonsectarian |
| Child's Play Learning Center Inc | 16.0 |
Early childhood program/child care center | Pre-KG-Trans. KG | 16 | 16.0 | Roman Catholic |
| Crosspoint Christian School | 16.2 |
Early childhood program/child care center | Pre-KG-Trans. KG | 27 | 14.2 | Lutheran Church - Missouri Synod |
| St Peters Early Childhood Development Center | 16.2 |
Early childhood program/child care center | Pre-KG-Trans. KG | 18 | 5.0 | Methodist |
| Five Star Montessori School At Kinasland Blvd | 18.5 |
Montessori | Pre-KG-Trans. 1 | 3 | 1.5 | Nonsectarian |
| Montessori Moments | 18.7 |
Montessori | Pre-KG-3 | 28 | 13.3 | Nonsectarian |
| Early Discovery Montessori School | 19.0 |
Montessori | Pre-KG-1 | 9 | 1.6 | Nonsectarian |
| Fellowship Christian Academy | 19.2 |
Regular elementary or secondary | Pre-KG-6 | 67 | 8.1 | Christian (no specific denomination) |
| Primose School Of Greatwood | 19.2 |
Early childhood program/child care center | Pre-KG-KG | 13 | 8.1 | Nonsectarian |
| Montessori-greatwood | 19.3 |
Montessori | Pre-KG-KG | 30 | 7.5 | Nonsectarian |
| Cambridge Montessori School | 19.5 |
Montessori | Pre-KG-2 | 145 | 29.0 | Nonsectarian |
| Southwest Community Christian Academy | 19.8 |
Regular elementary or secondary | Pre-KG-3 | 46 | 6.7 | Christian (no specific denomination) |
| West Oaks Private School | 19.9 |
Early childhood program/child care center | Pre-KG-KG | 7 | 7.0 | Nonsectarian |
| Park Point Montessori | 20.0 |
Montessori | Pre-KG-1 | 48 | 3.3 | Nonsectarian |
| Mission Bend Christian Academy | 20.2 |
Regular elementary or secondary | Pre-KG-6 | 60 | 7.0 | Methodist |
| American Montessori School | 20.3 |
Montessori | Pre-KG-2 | 9 | 9.0 | Nonsectarian |
| Dav Montessori School | 20.5 |
Montessori | Pre-KG-1 | 24 | 12.0 | Nonsectarian |
| Faith Lutheran School | 21.0 |
Regular elementary or secondary | KG-8 | 164 | 11.8 | Lutheran Church - Missouri Synod |
| Cornerstone Christian Academy | 21.2 |
Regular elementary or secondary | Pre-KG-3 | 62 | 9.4 | Church of Christ |
| John Paul Ii Catholic School | 21.5 |
Regular elementary or secondary | Pre-KG-8 | 634 | 18.4 | Roman Catholic |
| Darul Arqam School Southwest | 21.6 |
Regular elementary or secondary | Pre-KG-8 | 154 | 10.1 | Islamic |
| Smaller Scholars Too | 21.7 |
Montessori | Pre-KG-KG | 24 | 8.0 | Nonsectarian |
| 1st United Methd Ch School Little | 21.8 |
Early childhood program/child care center | Pre-KG-Trans. KG | 7 | 3.3 | Methodist |
| God's Rainbow Christian Academy | 21.9 |
Special program emphasis | KG-6 | 21 | 5.4 | Christian (no specific denomination) |
| Riverbend Montessori School | 21.9 |
Montessori | Pre-KG-5 | 62 | 9.5 | Nonsectarian |
| Five Star Montessori School | 22.0 |
Montessori | Pre-KG-3 | 16 | 14.6 | Nonsectarian |
| The Honor Roll School | 22.0 |
Regular elementary or secondary | Pre-KG-8 | 324 | 9.6 | Nonsectarian |
| The Village School | 22.1 |
Regular elementary or secondary | Pre-KG-8 | 634 | 18.4 | Nonsectarian |
| Westlake Child Development Center | 22.1 |
Montessori | Pre-KG-KG | 15 | 10.7 | Nonsectarian |
| Brookhollow Christian Academy | 22.2 |
Special program emphasis | Pre-KG-2 | 20 | 10.0 | Baptist |
| New Southwest Montessori | 22.3 |
Montessori | Pre-KG-1 | 20 | 2.3 | Nonsectarian |
| The Walden School | 22.3 |
Regular elementary or secondary | Pre-KG-3 | 32 | 8.0 | Nonsectarian |
| Fort Bend Montessori School | 22.6 |
Montessori | KG-1 | 23 | 3.8 | Nonsectarian |
| Smaller Scholars Montessori | 22.9 |
Montessori | Pre-KG-6 | 140 | 9.7 | Nonsectarian |
| Memorial Christian Academy | 23.0 |
Regular elementary or secondary | Pre-KG-8 | 76 | 11.0 | Christian (no specific denomination) |
| St Laurence Catholic School | 23.0 |
Regular elementary or secondary | Pre-KG-8 | 658 | 16.9 | Roman Catholic |
| First Colony Montessori South | 23.1 |
Montessori | Pre-KG-KG | 12 | 6.0 | Nonsectarian |
| Innovative Montessori School | 23.3 |
Montessori | Pre-KG-2 | 10 | 2.5 | Nonsectarian |
| Bear Creek United Methodist Church School | 23.4 |
Early childhood program/child care center | Pre-KG-Trans. KG | 29 | 8.8 | Methodist |
| Christ The Lord Lutheran Elementary School | 23.5 |
Regular elementary or secondary | Pre-KG-8 | 50 | 16.7 | Wisconsin Evangelical Lutheran Synod |
| First Colony Montessori | 23.7 |
Montessori | Pre-KG-Trans. KG | 30 | 10.3 | Nonsectarian |
| Christ Memorial Lutheran Early Childhood Learning | 23.9 |
Early childhood program/child care center | Pre-KG-KG | 13 | 2.1 | Lutheran Church - Missouri Synod |
| Sugar Grove Christian School | 24.0 |
Regular elementary or secondary | Pre-KG-6 | 172 | 13.2 | Church of Christ |
| Yorkshire Academy | 24.0 |
Regular elementary or secondary | Pre-KG-5 | 119 | 9.3 | Nonsectarian |
| Montessori Childrens School | 24.0 |
Montessori | Pre-KG-Trans. KG | 12 | 2.7 | Nonsectarian |
| Sugar Creek Montessori School | 24.0 |
Montessori | Pre-KG-3 | 54 | 9.0 | Nonsectarian |
| Little Wonders Learning Center | 24.4 |
Early childhood program/child care center | Pre-KG-KG | 5 | 1.7 | Nonsectarian |
| St Elizabeth Ann Seton School | 24.7 |
Regular elementary or secondary | KG-8 | 474 | 18.4 | Roman Catholic |
| Kingdom Fellowship Christian Academy | 24.8 |
Early childhood program/child care center | Pre-KG-KG | 12 | 12.0 | Christian (no specific denomination) |
| Cottage School | 24.8 |
Montessori | Pre-KG-6 | 30 | 7.5 | Nonsectarian |
| New Beginnings Academy | 24.8 |
Early childhood program/child care center | Pre-KG-Trans. 1 | 17 | 1.6 | Nonsectarian |
