| Episcopal High School Bellaire | 9-12 | 821 | 21.9 | Episcopal | <1 |
| Faith Lutheran Day School | PreK-K | 9 | 9 | Evangelical Lutheran Church in America | <1 |
| The Post Oak School | PreK-12 | 340 | 8.9 | Nonsectarian | <1 |
| St. Mark's Episcopal School | PreK-8 | 367 | 8.3 | Episcopal | <1 |
| Caroline School/Easter Seals Childrens Therapy | PreK-Transitional 1st | 19 | 3.8 | Nonsectarian | <1 |
| St. Vincent de Paul Catholic School | PreK-8 | 470 | 16.3 | Roman Catholic | 1 |
| Bonne Vie School | PreK-K | 2 | 0.5 | Nonsectarian | 1 |
| Veritas Christian Academy of Houston | PreK-8 | 159 | 8.8 | Christian (nondenominational) | 2 |
| Beth Yeshurun Day School | PreK-5 | 172 | 9.1 | Jewish | 2 |
| Holy Ghost Catholic School | PreK-8 | 153 | 12.8 | Roman Catholic | 2 |
| Primrose School of Upper Kirby | PreK-K | 9 | 9 | Nonsectarian | 2 |
| Fusion Academy Hs1: Houston Galleria | 7-12 | 43 | 1.8 | Nonsectarian | 2 |
| Crossing Borders Bilingual Academy | K | 11 | 7.9 | Nonsectarian | 2 |
| River Oaks Baptist School | PreK-8 | 799 | 11.6 | Baptist | 2 |
| St. Nicholas School | PreK-5 | 4 | 1.3 | Roman Catholic | 2 |
| St. Thomas Episcopal School | PreK-12 | 563 | 10.8 | Episcopal | 2 |
| St. Johns School | K-12 | 1,423 | 9.3 | Nonsectarian | 2 |
| San Francisco Nativity Academy | PreK-5 | 96 | 13.7 | Christian (nondenominational) | 2 |
| The House at Pooh Corner | PreK-K | 5 | 2.5 | Nonsectarian | 2 |
| St. Michael Catholic School - Houston | PreK-8 | 426 | 11.2 | Roman Catholic | 3 |
| Memorial Lutheran School | PreK-12 | 170 | 8.7 | Lutheran Church (Missouri Synod) | 3 |
| Mariner Montessori | PreK-K | 16 | 5.3 | Nonsectarian | 3 |
| Corpus Christi Catholic School | PreK-8 | 130 | 8.2 | Roman Catholic | 3 |
| The Emery/Weiner School | 6-12 | 601 | 9.9 | Jewish | 3 |
| The Emery/Weiner Center for Jewish Education | 6-12 | 604 | 8.7 | Jewish | 3 |
| St. Catherine's Montessori | PreK-12 | 210 | 14.4 | Roman Catholic | 3 |
| St. Anne Catholic School | PreK-8 | 419 | 16.8 | Roman Catholic | 3 |
| The Harris School | 1-6 | 33 | 5.5 | Nonsectarian | 3 |
| Tanglewood Academy | PreK-K | 4 | 0.3 | Nonsectarian | 3 |
| Becker Early Childhood Center | PreK-K | 10 | 4.3 | Jewish | 3 |
| St. Stephen's Episcopal School | PreK-8 | 85 | 3.4 | Episcopal | 3 |
| Archway Academy | 9-12 | 42 | 6 | Nonsectarian | 3 |
| Xavier Educational Academy | 3-12 | 123 | 5.4 | Nonsectarian | 3 |
| Montessori Learning Institute | PreK-8 | 45 | 7.6 | Nonsectarian | 3 |
| Excel High School Texas Digital Learning School | 6-12 | 230 | 46 | Nonsectarian | 4 |
| The Shlenker School | PreK-5 | 191 | 8.7 | Jewish | 4 |
| The Saint Constantine School | PreK-12 | 458 | 11.2 | Other religious | 4 |
| Presbyterian School | PreK-8 | 567 | 7.8 | Christian (nondenominational) | 4 |
| St. Paul's School | PreK-K | 10 | 5 | Methodist | 4 |
| The Joy School | K-8 | 159 | 3.7 | Nonsectarian | 4 |
| Annunciation Orthodox School | PreK-8 | 632 | 11.3 | Greek Orthodox | 4 |
| The School for Young Children | K | 32 | 5.3 | Nonsectarian | 4 |
| Montessori School Downtown | K-2 | 17 | 8.5 | Nonsectarian | 4 |
| St. Thomas More Parish School | PreK-8 | 247 | 12.6 | Roman Catholic | 4 |
| Guidepost Montessori at Galleria | PreK-K | 4 | 0.3 | Nonsectarian | 4 |
| Westbury Christian School | PreK-12 | 299 | 8 | Church of Christ | 4 |
| St. Theresa Catholic School | PreK-8 | 311 | 10.7 | Roman Catholic | 4 |
| Second Baptist School | PreK-12 | 1,100 | 10.1 | Baptist | 4 |
| Melinda Webb School | PreK-K | 5 | 2.5 | Nonsectarian | 4 |
| The Kipling School | K-8 | 120 | 7.1 | Nonsectarian | 4 |
| The Kinkaid School - Head of School Office | PreK-12 | 1,421 | 8.6 | Nonsectarian | 4 |
| The Imani School | PreK-8 | 219 | 9.2 | Christian (nondenominational) | 5 |
| St. Mary of the Purification Catholic School | PreK-5 | 90 | 7.9 | Roman Catholic | 5 |
| First Baptist Academy | PreK-8 | 273 | 7.6 | Baptist | 5 |
| St. Francis de Sales School | PreK-8 | 208 | 6.9 | Roman Catholic | 5 |
| Duchesne Academy of the Sacred Heart | PreK-12 | 713 | 8.1 | Roman Catholic | 5 |
| Torah Day School | PreK-8 | 114 | 8 | Jewish | 5 |
| St. Francis Episcopal School | PreK-12 | 805 | 11.7 | Episcopal | 5 |
| M.p.j. Academy of Excellence | 9-12 | 72 | 36 | Nonsectarian | 5 |
| Yellow School-Mdpc | PreK-K | 62 | 31 | Presbyterian | 5 |
| Journey School of Houston | 1-7 | 10 | 3.3 | Nonsectarian | 6 |
| Yeshiva Torat Emet | PreK-8 | 316 | 10.5 | Jewish | 6 |
| The Tenney School | 6-12 | 69 | 5.6 | Nonsectarian | 6 |
| Second Baptist School University-Model | 3-12 | 10 | 10 | Baptist | 6 |
| Strake Jesuit College Prep School | 9-12 | 1,390 | 10 | Roman Catholic | 6 |
| Wheeler Avenue Christian Academy | PreK-K | 6 | 3.8 | Christian (nondenominational) | 6 |
| St. Agnes Academy College Preparatory | 9-12 | 934 | 12.7 | Roman Catholic | 6 |
| Yellowstone Academy | PreK-5 | 215 | 8.6 | Christian (nondenominational) | 6 |
| The Regis School of the Sacred Heart | PreK-8 | 257 | 7.6 | Roman Catholic | 6 |
| Torah Girls Academy of Texas | 9-12 | 33 | 2.4 | Jewish | 6 |
| School of the Woods | PreK-12 | 223 | 4.5 | Nonsectarian | 6 |
| Cathedral House Episcipol School | PreK-Transitional K | 13 | 13 | Episcopal | 6 |
| Incarnate Word Academy | 9-12 | 248 | 8.3 | Roman Catholic | 6 |
| Institute of Chinese Culture | PreK-K | 32 | 4.4 | Nonsectarian | 6 |
| The Gateway Academy | 6-12 | 76 | 3.2 | Nonsectarian | 7 |
| Knowledge-First Empowerment Academy | 6-12 | 115 | 13.5 | Nonsectarian | 7 |
| Grace School, Houston | PreK-8 | 368 | 6.3 | Presbyterian | 7 |
| Grace School | PreK-8 | 360 | 9.3 | Presbyterian | 7 |
| Marian High School (Nti Career Institute) | 9-12 | 150 | 15 | Nonsectarian | 7 |
| Our Lady of Guadalupe School | PreK-8 | 195 | 15.9 | Roman Catholic | 7 |
| River Oaks Academy | 3-12 | 38 | 3.5 | Nonsectarian | 7 |
| Lutheran High North | 6-12 | 103 | 8.2 | Lutheran Church (Missouri Synod) | 7 |
| Molo Bilingual Montessori School | PreK-5 | 17 | 0.9 | Nonsectarian | 7 |
| Holy Spirit Episcopal School - Houston | PreK-8 | 77 | 4.7 | Episcopal | 7 |
| St. Rose of Lima Catholic School | PreK-8 | 353 | 10.6 | Roman Catholic | 8 |
| Central Christian Academy | PreK-12 | 30 | 6 | Christian (nondenominational) | 8 |
| Institute for Girls Education, Dba Magnolia School | 1-8 | 137 | 4.8 | Nonsectarian | 8 |
| Pines Presbyterian Preschool | PreK-Transitional K | 27 | 13.5 | Presbyterian | 8 |
| St. Ambrose School | PreK-8 | 231 | 6.6 | Roman Catholic | 8 |
| Ilm Academy | PreK-8 | 155 | 6 | Islamic | 8 |
| St. Jerome Catholic School | PreK-8 | 125 | 8.9 | Roman Catholic | 8 |
| Excel Adventist Academy | PreK-8 | 44 | 7.6 | Seventh-Day Adventist | 8 |
| Cristo Rey Jesuit College Prep School of Houston | 9-12 | 472 | 11.8 | Roman Catholic | 9 |
| The Briarwood School | 1-11 | 272 | 2.9 | Nonsectarian | 9 |
| St. Pius X High School | 9-12 | 558 | 14 | Roman Catholic | 9 |
| The Hub Houston Inc. | 9-12 | 25 | 3.6 | Nonsectarian | 9 |
| Made Houston | 3-8 | 16 | 3.2 | Nonsectarian | 9 |
| Peaceful Beginnings Montessori Academy | PreK-K | 15 | 5 | Christian (nondenominational) | 9 |
| Harbor Christian Academy | PreK-7 | 122 | 6.3 | Christian (nondenominational) | 10 |
| Our Savior Lutheran School | PreK-8 | 264 | 14 | Lutheran Church (Missouri Synod) | 10 |
| Yorkshire Academy | K-5 | 98 | 9 | Nonsectarian | 10 |
| The Branch School | PreK-8 | 112 | 23.3 | Nonsectarian | 10 |
| Rainard School | PreK-8 | 32 | 3.4 | Nonsectarian | 10 |
| Sherwood Forest Montessori School | PreK-K | 24 | 4 | Nonsectarian | 10 |
| Resurrection Catholic School | PreK-8 | 74 | 6.5 | Roman Catholic | 10 |
| Primrose School of West Pearland | PreK-K | 3 | 3 | Nonsectarian | 10 |
| La Maternelle French Academy | K | 7 | 7 | Nonsectarian | 10 |
| Smaller Scholars Montessori | PreK-6 | 232 | 4.6 | Nonsectarian | 10 |
| Japanese Educational Institute | K-12 | 497 | 110.4 | Nonsectarian | 10 |
| C Fc Bilingual Academy | PreK-7 | 31 | 4.5 | Christian (nondenominational) | 10 |
| Christian School of Northwest Houston | PreK-4 | 11 | 5.5 | Church of Christ | 10 |
| Fort Bend Montessori School | K-1 | 7 | 7 | Nonsectarian | 10 |
| Silverline Montessori School - Shadow Creek | K-5 | 112 | 7.3 | Nonsectarian | 10 |
| Bakers Prep School | PreK-5 | 24 | 6 | Christian (nondenominational) | 10 |
| Houston Christian High School | 9-12 | 507 | 10 | Christian (nondenominational) | 10 |
| Westview School | PreK-8 | 96 | 4.4 | Nonsectarian | 10 |
| The Parish School | PreK | 81 | 8.1 | Nonsectarian | 10 |
| Everest Academy | PreK-9 | 480 | 6.6 | Islamic | 10 |
| Sugar Creek Montessori School | PreK-3 | 33 | 4.1 | Nonsectarian | 10 |
| Villa Di Maria Montessori School | PreK-K | 9 | 3 | Nonsectarian | 10 |
| The Village School | PreK-12 | 1,565 | 10.5 | Nonsectarian | 10 |
| Village Middle School | 5-8 | 454 | 11.1 | Nonsectarian | 10 |
| St. Christopher Catholic School | PreK-8 | 151 | 11.6 | Roman Catholic | 11 |
| The Williams School Dba Homeschool Academy | 3-12 | 15 | 4.8 | Nonsectarian | 11 |
| Shady Acres Christian School | K-12 | 59 | 9.8 | Baptist | 11 |
| Van Houston Academy | K-12 | 171 | 9.5 | Nonsectarian | 11 |
| Logos Preparatory School | K-12 | 605 | 22.4 | Christian (nondenominational) | 11 |
| Kings Academy | PreK-8 | 24 | 6.7 | Christian (nondenominational) | 11 |
| Primrose School of Eldridge Parkway | PreK-K | 7 | 7 | Nonsectarian | 11 |
| King's Academy | PreK-8 | 21 | 4.4 | Christian (nondenominational) | 11 |
| Five Star Montessori School | PreK-K | 6 | 3 | Nonsectarian | 11 |
| Kids R Kids No. 42 Shadow Creek Ranch | PreK-K | 11 | 11 | Nonsectarian | 11 |
| Dominion Lifestyle Academy | PreK-K | 2 | 2 | Christian (nondenominational) | 11 |
| Westside Montessori School | PreK-8 | 94 | 7.3 | Nonsectarian | 11 |
| Genesis Christian School | PreK-12 | 167 | 9.4 | Christian (nondenominational) | 11 |
| Our Redeemer Lutheran North School | 4-11 | 6 | 3 | Lutheran Church (Missouri Synod) | 11 |
| Assumption Catholic School | PreK-8 | 207 | 12.5 | Roman Catholic | 11 |
| D.a.v. Montessori School | PreK-5 | 59 | 8.1 | Other religious | 12 |
| Bright Learners Academy | PreK-K | 12 | 3 | Nonsectarian | 12 |
| Fort Bend Christian Academy Elementary School | PreK-4 | 238 | 7.9 | Nonsectarian | 12 |
| Iman Academy Southwest | PreK-12 | 396 | 13.2 | Islamic | 12 |
| Westlake Child Development Center | PreK-Transitional K | 18 | 0.5 | Nonsectarian | 12 |
| The Wide School | K-12 | 295 | 16.3 | Nonsectarian | 12 |