| Baytown Christian Academy | Baytown | PreK-12 | 225 | 10 | Christian (nondenominational) |
| First Baptist Academy | Baytown | PreK-6 | 46 | 5.1 | Baptist |
| Redeemer Lutheran Children's Center | Baytown | Ungraded | 100 | 333.3 | Lutheran Church (Missouri Synod) |
| Episcopal High School Bellaire | Bellaire | 9-12 | 821 | 21.9 | Episcopal |
| Faith Lutheran Day School | Bellaire | PreK-K | 9 | 9 | Evangelical Lutheran Church in America |
| The Post Oak School | Bellaire | PreK-12 | 340 | 8.9 | Nonsectarian |
| Veritas Christian Academy of Houston | Bellaire | PreK-8 | 159 | 8.8 | Christian (nondenominational) |
| Sacred Heart Catholic School | Crosby | PreK-8 | 110 | 9.6 | Roman Catholic |
| Covenant Academy | Cypress | PreK-12 | 173 | 6 | Christian (nondenominational) |
| Growing Scholars Montessori School | Cypress | PreK-K | 13 | 6.8 | Nonsectarian |
| Houston Adventist Acadmey | Cypress | PreK-12 | 206 | 13.2 | Seventh-Day Adventist |
| Lycee Montessori School | Cypress | PreK-K | 3 | 0.8 | Nonsectarian |
| Primrose School of Barker Cypress | Cypress | PreK-K | 25 | 12.5 | Nonsectarian |
| The Connection School of Houston | Cypress | K-12 | 127 | 6.7 | Christian (nondenominational) |
| Life Lutheran School | Friendswood | PreK-8 | 61 | 10 | Lutheran |
| Little Wonders of Baybrook Baptist | Friendswood | PreK-K | 1 | 1 | Baptist |
| The Galloway School | Friendswood | PreK-5 | 70 | 7 | Christian (nondenominational) |
| Our Lady of Fatima Catholic School-Gp | Galena Park | K-8 | 156 | 11.5 | Roman Catholic |
| Chinquapin Preparatory School | Highlands | 6-12 | 124 | 8.1 | Nonsectarian |
| Abiding Word Lutheran School | Houston | PreK-8 | 61 | 6.8 | Wisconsin Evangelical Lutheran Synod |
| Al Hadi School | Houston | PreK-12 | 414 | 4.3 | Islamic |
| Al Nur School | Houston | PreK-6 | 21 | 2.6 | Islamic |
| Annunciation Orthodox School | Houston | PreK-8 | 632 | 11.3 | Greek Orthodox |
| Apple Tree School | Houston | PreK-1 | 7 | 7 | Christian (nondenominational) |
| Archway Academy | Houston | 9-12 | 42 | 6 | Nonsectarian |
| Armand Bayou Montessori | Houston | PreK-5 | 29 | 2.8 | Nonsectarian |
| Assumption Catholic School | Houston | PreK-8 | 207 | 12.5 | Roman Catholic |
| Bay Area Montessori House | Houston | PreK-8 | 46 | 11.5 | Christian (nondenominational) |
| Becker Early Childhood Center | Houston | PreK-K | 10 | 4.3 | Jewish |
| Beth Yeshurun Day School | Houston | PreK-5 | 172 | 9.1 | Jewish |
| Bkm Katy Tamil School | Houston | K-8 | 80 | 6.4 | Nonsectarian |
| Bonne Vie School | Houston | PreK-K | 2 | 0.5 | Nonsectarian |
| Brookhollow Christian Academy | Houston | PreK-K | 37 | 9.2 | Baptist |
| Caroline School/Easter Seals Childrens Therapy | Houston | PreK-Transitional 1st | 19 | 3.8 | Nonsectarian |
| Cathedral House Episcipol School | Houston | PreK-Transitional K | 13 | 13 | Episcopal |
| Central Christian Academy | Houston | PreK-12 | 30 | 6 | Christian (nondenominational) |
| Christ the Redeemer Catholic School | Houston | PreK-8 | 413 | 16.3 | Roman Catholic |
| Christian School of Northwest Houston | Houston | PreK-4 | 11 | 5.5 | Church of Christ |
| Corpus Christi Catholic School | Houston | PreK-8 | 130 | 8.2 | Roman Catholic |
| Cranbrook Learning Connection | Houston | PreK-K | 10 | 9.1 | Nonsectarian |
| Creative Corner | Houston | PreK-Transitional 1st | 30 | 18.8 | Nonsectarian |
| Cristo Rey Jesuit College Prep School of Houston | Houston | 9-12 | 472 | 11.8 | Roman Catholic |
| Cy Fair Montessori School | Houston | PreK-K | 35 | 8.8 | Nonsectarian |
| Cypress Christian School | Houston | K-12 | 830 | 12.3 | Christian (nondenominational) |
| Cypress Montessori School | Houston | PreK-K | 13 | 13 | Nonsectarian |
| D.a.v. Montessori School | Houston | PreK-5 | 59 | 8.1 | Other religious |
| Dar Ul Arqam School North | Houston | PreK-12 | 252 | 10.9 | Islamic |
| Dominion Lifestyle Academy | Houston | PreK-K | 2 | 2 | Christian (nondenominational) |
| Duchesne Academy of the Sacred Heart | Houston | PreK-12 | 713 | 8.1 | Roman Catholic |
| Early Discovery Montessori Academy | Houston | PreK-1 | 4 | 4 | Nonsectarian |
| Epiphany Lutheran School | Houston | PreK-8 | 129 | 10.9 | Lutheran Church (Missouri Synod) |
| Eternity Christian School | Houston | PreK-7 | 32 | 7 | Assembly of God |
| Excel High School Texas Digital Learning School | Houston | 6-12 | 230 | 46 | Nonsectarian |
| First Baptist Academy | Houston | PreK-8 | 273 | 7.6 | Baptist |
| Five Star Montessori School | Houston | PreK-K | 6 | 3 | Nonsectarian |
| Fusion Academy Hs1: Houston Galleria | Houston | 7-12 | 43 | 1.8 | Nonsectarian |
| Genesis Christian School | Houston | PreK-12 | 167 | 9.4 | Christian (nondenominational) |
| Grace Christian Academy | Houston | PreK-12 | 181 | 10.6 | Christian (nondenominational) |
| Grace School | Houston | PreK-8 | 360 | 9.3 | Presbyterian |
| Grace School, Houston | Houston | PreK-8 | 368 | 6.3 | Presbyterian |
| Guidepost Montessori at Galleria | Houston | PreK-K | 4 | 0.3 | Nonsectarian |
| Harbor Christian Academy | Houston | PreK-7 | 122 | 6.3 | Christian (nondenominational) |
| Heritage Preparatory School | Houston | PreK-8 | 15 | 4.2 | Christian (nondenominational) |
| Holy Ghost Catholic School | Houston | PreK-8 | 153 | 12.8 | Roman Catholic |
| Holy Spirit Episcopal School - Houston | Houston | PreK-8 | 77 | 4.7 | Episcopal |
| Houston Christian High School | Houston | 9-12 | 507 | 10 | Christian (nondenominational) |
| Houston Quran Academy | Houston | K-12 | 326 | 10.3 | Islamic |
| Ilm Academy | Houston | PreK-8 | 155 | 6 | Islamic |
| Iman Academy Southwest | Houston | PreK-12 | 396 | 13.2 | Islamic |
| Incarnate Word Academy | Houston | 9-12 | 248 | 8.3 | Roman Catholic |
| Institute for Girls Education, Dba Magnolia School | Houston | 1-8 | 137 | 4.8 | Nonsectarian |
| Institute of Chinese Culture | Houston | PreK-K | 32 | 4.4 | Nonsectarian |
| Japanese Educational Institute | Houston | K-12 | 497 | 110.4 | Nonsectarian |
| Journey School of Houston | Houston | 1-7 | 10 | 3.3 | Nonsectarian |
| Kardia Christian Academy | Houston | K-7 | 131 | 8.6 | Presbyterian |
| Katy Islamic Academy/Ihouston Quran Academy | Houston | PreK-12 | 328 | 12.1 | Islamic |
| Kids R Kids #35 Tx Lakeshore | Houston | PreK-K | 15 | 15 | Nonsectarian |
| King's Academy | Houston | PreK-8 | 21 | 4.4 | Christian (nondenominational) |
| Kings Academy | Houston | PreK-8 | 24 | 6.7 | Christian (nondenominational) |
| Knowledge-First Empowerment Academy | Houston | 6-12 | 115 | 13.5 | Nonsectarian |
| La Maternelle French Academy | Houston | K | 7 | 7 | Nonsectarian |
| Lakewood Montessori School | Houston | PreK-K | 29 | 4.8 | Nonsectarian |
| Lutheran High North | Houston | 6-12 | 103 | 8.2 | Lutheran Church (Missouri Synod) |
| Lycee International de Houston | Houston | PreK-12 | 116 | 6.7 | Nonsectarian |
| M.p.j. Academy of Excellence | Houston | 9-12 | 72 | 36 | Nonsectarian |
| Made Houston | Houston | 3-8 | 16 | 3.2 | Nonsectarian |
| Marian High School (Nti Career Institute) | Houston | 9-12 | 150 | 15 | Nonsectarian |
| Mariner Montessori | Houston | PreK-K | 16 | 5.3 | Nonsectarian |
| Melinda Webb School | Houston | PreK-K | 5 | 2.5 | Nonsectarian |
| Memorial Lutheran School | Houston | PreK-12 | 170 | 8.7 | Lutheran Church (Missouri Synod) |
| Molo Bilingual Montessori School | Houston | PreK-5 | 17 | 0.9 | Nonsectarian |
| Montessori Learning Institute | Houston | PreK-8 | 45 | 7.6 | Nonsectarian |
| Montessori School Downtown | Houston | K-2 | 17 | 8.5 | Nonsectarian |
| Northland Christian School Pk-12 | Houston | PreK-12 | 421 | 8.3 | Christian (nondenominational) |
| Northwood Montessori School | Houston | K | 51 | 5.1 | Nonsectarian |
| Our Lady of Guadalupe School | Houston | PreK-8 | 195 | 15.9 | Roman Catholic |
| Our Redeemer Lutheran North School | Houston | 4-11 | 6 | 3 | Lutheran Church (Missouri Synod) |
| Our Savior Lutheran School | Houston | PreK-8 | 264 | 14 | Lutheran Church (Missouri Synod) |
| Peaceful Beginnings Montessori Academy | Houston | PreK-K | 15 | 5 | Christian (nondenominational) |
| Pines Presbyterian Preschool | Houston | PreK-Transitional K | 27 | 13.5 | Presbyterian |
| Presbyterian School | Houston | PreK-8 | 567 | 7.8 | Christian (nondenominational) |
| Primrose School | Houston | K | 18 | 18 | Nonsectarian |
| Primrose School of Eldridge Parkway | Houston | PreK-K | 7 | 7 | Nonsectarian |
| Primrose School of Upper Kirby | Houston | PreK-K | 9 | 9 | Nonsectarian |
| Rainard School | Houston | PreK-8 | 32 | 3.4 | Nonsectarian |
| Resurrection Catholic School | Houston | PreK-8 | 74 | 6.5 | Roman Catholic |
| River Oaks Academy | Houston | 3-12 | 38 | 3.5 | Nonsectarian |
| River Oaks Baptist School | Houston | PreK-8 | 799 | 11.6 | Baptist |
| San Francisco Nativity Academy | Houston | PreK-5 | 96 | 13.7 | Christian (nondenominational) |
| School of the Woods | Houston | PreK-12 | 223 | 4.5 | Nonsectarian |
| Second Baptist School | Houston | PreK-12 | 1,100 | 10.1 | Baptist |
| Second Baptist School University-Model | Houston | 3-12 | 10 | 10 | Baptist |
| Sherwood Forest Montessori School | Houston | PreK-K | 24 | 4 | Nonsectarian |
| Smaller Scholars Montessori | Houston | PreK-6 | 232 | 4.6 | Nonsectarian |
| Southwest Community Christian Academy | Houston | Transitional K | 12 | 4.6 | Christian (nondenominational) |
| St. Agnes Academy College Preparatory | Houston | 9-12 | 934 | 12.7 | Roman Catholic |
| St. Ambrose School | Houston | PreK-8 | 231 | 6.6 | Roman Catholic |
| St. Anne Catholic School | Houston | PreK-8 | 419 | 16.8 | Roman Catholic |
| St. Augustine Catholic School | Houston | PreK-8 | 100 | 8.4 | Roman Catholic |
| St. Catherine's Montessori | Houston | PreK-12 | 210 | 14.4 | Roman Catholic |
| St. Christopher Catholic School | Houston | PreK-8 | 151 | 11.6 | Roman Catholic |
| St. Clare of Assisi Catholic School | Houston | PreK-8 | 101 | 7.2 | Roman Catholic |
| St. Elizabeth Ann Seton Catholic School | Houston | PreK-8 | 180 | 13.8 | Roman Catholic |
| St. Francis de Sales School | Houston | PreK-8 | 208 | 6.9 | Roman Catholic |
| St. Francis Episcopal School | Houston | PreK-12 | 805 | 11.7 | Episcopal |
| St. Jerome Catholic School | Houston | PreK-8 | 125 | 8.9 | Roman Catholic |
| St. Johns School | Houston | K-12 | 1,423 | 9.3 | Nonsectarian |
| St. Mark's Episcopal School | Houston | PreK-8 | 367 | 8.3 | Episcopal |
| St. Mary of the Purification Catholic School | Houston | PreK-5 | 90 | 7.9 | Roman Catholic |
| St. Michael Catholic School - Houston | Houston | PreK-8 | 426 | 11.2 | Roman Catholic |
| St. Nicholas School | Houston | PreK-5 | 4 | 1.3 | Roman Catholic |
| St. Paul's School | Houston | PreK-K | 10 | 5 | Methodist |
| St. Pius X High School | Houston | 9-12 | 558 | 14 | Roman Catholic |
| St. Rose of Lima Catholic School | Houston | PreK-8 | 353 | 10.6 | Roman Catholic |
| St. Stephen's Episcopal School | Houston | PreK-8 | 85 | 3.4 | Episcopal |
| St. Theresa Catholic School | Houston | PreK-8 | 311 | 10.7 | Roman Catholic |
| St. Thomas Episcopal School | Houston | PreK-12 | 563 | 10.8 | Episcopal |
| St. Thomas More Parish School | Houston | PreK-8 | 247 | 12.6 | Roman Catholic |
| St. Vincent de Paul Catholic School | Houston | PreK-8 | 470 | 16.3 | Roman Catholic |
| Strake Jesuit College Prep School | Houston | 9-12 | 1,390 | 10 | Roman Catholic |
| Tanglewood Academy | Houston | PreK-K | 4 | 0.3 | Nonsectarian |
| Texas Christian School | Houston | PreK-12 | 195 | 18.4 | Christian (nondenominational) |
| The Banff School | Houston | PreK-12 | 169 | 8.1 | Nonsectarian |
| The Branch School | Houston | PreK-8 | 112 | 23.3 | Nonsectarian |
| The Briarwood School | Houston | 1-11 | 272 | 2.9 | Nonsectarian |
| The Childrens Courtyard 3052 | Houston | PreK-Transitional K | 5 | 5 | Nonsectarian |
| The Emery/Weiner Center for Jewish Education | Houston | 6-12 | 604 | 8.7 | Jewish |
| The Emery/Weiner School | Houston | 6-12 | 601 | 9.9 | Jewish |
| The Gateway Academy | Houston | 6-12 | 76 | 3.2 | Nonsectarian |
| The Greenwood Preschool | Houston | PreK-Transitional K | 12 | 12 | Nonsectarian |
| The Harris School | Houston | 1-6 | 33 | 5.5 | Nonsectarian |
| The House at Pooh Corner | Houston | PreK-K | 5 | 2.5 | Nonsectarian |
| The Hub Houston Inc. | Houston | 9-12 | 25 | 3.6 | Nonsectarian |
| The Imani School | Houston | PreK-8 | 219 | 9.2 | Christian (nondenominational) |
| The Joy School | Houston | K-8 | 159 | 3.7 | Nonsectarian |
| The Kinkaid School - Head of School Office | Houston | PreK-12 | 1,421 | 8.6 | Nonsectarian |
| The Kipling School | Houston | K-8 | 120 | 7.1 | Nonsectarian |
| The Parish School | Houston | PreK | 81 | 8.1 | Nonsectarian |
| The Regis School of the Sacred Heart | Houston | PreK-8 | 257 | 7.6 | Roman Catholic |
| The Saint Constantine School | Houston | PreK-12 | 458 | 11.2 | Other religious |
| The School for Young Children | Houston | K | 32 | 5.3 | Nonsectarian |
| The Shlenker School | Houston | PreK-5 | 191 | 8.7 | Jewish |
| The Tenney School | Houston | 6-12 | 69 | 5.6 | Nonsectarian |
| The Village School | Houston | PreK-12 | 1,565 | 10.5 | Nonsectarian |
| Torah Day School | Houston | PreK-8 | 114 | 8 | Jewish |
| Torah Girls Academy of Texas | Houston | 9-12 | 33 | 2.4 | Jewish |
| Van Houston Academy | Houston | K-12 | 171 | 9.5 | Nonsectarian |
| Village Middle School | Houston | 5-8 | 454 | 11.1 | Nonsectarian |
| West Montessori School of Copperfield | Houston | K | 2 | 0.7 | Nonsectarian |
| Westbury Christian School | Houston | PreK-12 | 299 | 8 | Church of Christ |
| Westlake Child Development Center | Houston | PreK-Transitional K | 18 | 0.5 | Nonsectarian |
| Westside Montessori School | Houston | PreK-8 | 94 | 7.3 | Nonsectarian |
| Westview School | Houston | PreK-8 | 96 | 4.4 | Nonsectarian |
| Wheeler Avenue Christian Academy | Houston | PreK-K | 6 | 3.8 | Christian (nondenominational) |
| Xavier Educational Academy | Houston | 3-12 | 123 | 5.4 | Nonsectarian |
| Yellow School-Mdpc | Houston | PreK-K | 62 | 31 | Presbyterian |
| Yellowstone Academy | Houston | PreK-5 | 215 | 8.6 | Christian (nondenominational) |
| Yeshiva Torat Emet | Houston | PreK-8 | 316 | 10.5 | Jewish |
| Yorkshire Academy | Houston | K-5 | 98 | 9 | Nonsectarian |
| Atascocita Montessori School | Humble | K | 20 | 3.3 | Nonsectarian |
| Humble Christian School | Humble | PreK-12 | 245 | 11.7 | Christian (nondenominational) |
| Joshua 19 Learning Center Inc | Humble | PreK-6 | 113 | 8.7 | Christian (nondenominational) |
| Primrose School at Fall Creek | Humble | PreK-K | 12 | 6 | Nonsectarian |
| St. Mary Magadalene Catholic School | Humble | PreK-8 | 142 | 9.7 | Roman Catholic |
| British International School of Houston | Katy | PreK-12 | 939 | 9.6 | Nonsectarian |
| Cross Point Preschool Katy | Katy | PreK-Transitional K | 24 | 26.7 | Lutheran Church (Missouri Synod) |
| Epiphany of the Lord Catholic School | Katy | PreK-8 | 389 | 15 | Roman Catholic |
| Faith West Academy | Katy | PreK-12 | 300 | 7.3 | Christian (nondenominational) |
| Guidepost Monessori at Katy | Katy | PreK-K | 10 | 0.7 | Nonsectarian |
| Katy Adventist Christian School | Katy | PreK-8 | 23 | 7.7 | Seventh-Day Adventist |
| Katy Christian Academy | Katy | PreK-12 | 98 | 98 | Pentecostal |
| Katy Gt Academy | Katy | PreK-1 | 10 | 2.2 | Nonsectarian |
| Kiddie Academy of Elyson | Katy | PreK-K | 11 | 11 | Nonsectarian |
| Mirus Academy | Katy | 8-12 | 30 | 7 | Nonsectarian |
| Primrose School of Kelliwood | Katy | PreK-K | 23 | 7.7 | Nonsectarian |
| Safari Kids Learning Center | Katy | K | 12 | 12 | Nonsectarian |
| St. John Xxiii College Prreparatory | Katy | 9-12 | 432 | 11.3 | Roman Catholic |
| Good Shepherd Episcopal School | Kingwood | PreK-Transitional K | 21 | 10.5 | Episcopal |
| Pines Montessori School | Kingwood | PreK-8 | 122 | 6.1 | Nonsectarian |
| Primrose School of Kingwood | Kingwood | PreK-K | 10 | 0.4 | Nonsectarian |
| St. Martha Catholic School | Kingwood | PreK-8 | 274 | 13.5 | Roman Catholic |
| The Covenant Preparatory School | Kingwood | PreK-12 | 257 | 9.3 | Christian (nondenominational) |
| Asbury Methodist Day School | Pasadena | PreK-K | 5 | 1.7 | Methodist |
| Star Montessori School | Pasadena | K | 275 | 7.6 | Nonsectarian |
| Cypresswood Montessori School | Spring | PreK-K | 5 | 1.7 | Nonsectarian |
| Founders Christian School | Spring | K-12 | 201 | 5.8 | Christian (nondenominational) |
| Frassati Catholic High School | Spring | 9-12 | 321 | 12.8 | Roman Catholic |
| Greengate Academy Inc | Spring | PreK-K | 10 | 10 | Nonsectarian |
| Houston Focus Academy Inc | Spring | 7-12 | 14 | 7 | Nonsectarian |
| Houston Peace Academy | Spring | PreK-7 | 87 | 9.2 | Islamic |
| Klein Weekday Ministries | Spring | PreK-Transitional K | 13 | 0.6 | Methodist |
| Primrose School of Spring Klein | Spring | K | 20 | 6.7 | Nonsectarian |
| Providence Classical School | Spring | PreK-12 | 374 | 7.6 | Christian (nondenominational) |
| Spell Well Montessori School | Spring | PreK-8 | 72 | 9 | Nonsectarian |
| St. Edward Catholic School | Spring | PreK-8 | 206 | 11.8 | Roman Catholic |
| Trinity Lutheran School | Spring | PreK-8 | 517 | 16.4 | Lutheran Church (Missouri Synod) |
| Center for Teaching & Learning | The Woodlands | PreK-12 | 74 | 8.4 | Nonsectarian |
| Crossing Borders Bilingual Academy | The Woodlands | K | 11 | 7.9 | Nonsectarian |
| Cunae International School | The Woodlands | PreK-12 | 87 | 6.7 | Nonsectarian |
| Primrose School of the Woodlands at Creekside Park | The Woodlands | PreK-K | 13 | 6.5 | Nonsectarian |
| Concordia Lutheran High School | Tomball | 9-12 | 573 | 14.9 | Lutheran Church (Missouri Synod) |
| Great Oak School | Tomball | PreK-8 | 113 | 8.5 | Nonsectarian |
| Rosehill Christian School | Tomball | PreK-12 | 448 | 9.7 | Christian (nondenominational) |
| Salem Lutheran School | Tomball | PreK-8 | 349 | 8.8 | Lutheran Church (Missouri Synod) |
| Shady Acres Christian School | Tomball | K-12 | 59 | 9.8 | Baptist |
| St. Anne Catholic School | Tomball | PreK-8 | 303 | 10.3 | Roman Catholic |
| Distinct Abilities | Webster | K-3 | 9 | 4.5 | Nonsectarian |
| The Momentum Academy | Webster | 9-12 | 15 | 5.4 | Christian (nondenominational) |