| 12 Stones Christian Microschool | not reported | not reported | not reported | not reported |
| 8 Million Stories | not reported | not reported | not reported | not reported |
| Abiding Word Lutheran School | PreK-8 | 61 | 6.8 | Wisconsin Evangelical Lutheran Synod |
| Acton Leadership Academy Champions/Klein | not reported | not reported | not reported | not reported |
| Al Nur School | PreK-6 | 21 | 2.6 | Islamic |
| Apple Tree School | PreK-1 | 7 | 7 | Christian (nondenominational) |
| Assumption Catholic School | PreK-8 | 207 | 12.5 | Roman Catholic |
| Becker Early Childhood Center | PreK-K | 10 | 4.3 | Jewish |
| Bethel's Family Christian Academy | not reported | not reported | not reported | not reported |
| Brookhollow Christian Academy | PreK-K | 37 | 9.2 | Baptist |
| Christ the Redeemer Catholic School | PreK-8 | 413 | 16.3 | Roman Catholic |
| Community Preschools at Eastex | not reported | not reported | not reported | not reported |
| Corpus Christi Catholic School | PreK-8 | 130 | 8.2 | Roman Catholic |
| Cranbrook Learning Connection | PreK-K | 10 | 9.1 | Nonsectarian |
| Cristo Rey Jesuit College Prep School of Houston | 9-12 | 472 | 11.8 | Roman Catholic |
| D.A.V. Montessori School | PreK-5 | 59 | 8.1 | Other religious |
| Dar Ul Arqam School North | PreK-12 | 252 | 10.9 | Islamic |
| Dyslexia School of Houston | not reported | not reported | not reported | not reported |
| Eagles on the Rock Bilingual Academy | not reported | not reported | not reported | not reported |
| Elderflower Montessori | not reported | not reported | not reported | not reported |
| Epiphany Lutheran School | PreK-8 | 129 | 10.9 | Lutheran Church (Missouri Synod) |
| Eternity Christian School | PreK-7 | 32 | 7 | Assembly of God |
| First Baptist Academy | PreK-8 | 273 | 7.6 | Baptist |
| Fusion Academy Hs1: Houston Galleria | 7-12 | 43 | not reported | Nonsectarian |
| Genesis Christian School | PreK-12 | 167 | 9.4 | Christian (nondenominational) |
| Goudeau Accelerated Preparatory Academy | not reported | not reported | not reported | not reported |
| Grace Christian Academy | PreK-12 | 181 | 10.6 | Christian (nondenominational) |
| Guidepost Montessori at Galleria | PreK-K | 4 | not reported | Nonsectarian |
| Harbor Christian Academy | PreK-7 | 122 | 6.3 | Christian (nondenominational) |
| Heart of Christ Academy (Naums) | not reported | not reported | not reported | not reported |
| Hijaz Academy | PreK-5 | 89 | 7 | Islamic |
| Holy Ghost Catholic School | PreK-8 | 153 | 12.8 | Roman Catholic |
| Horizon Leadership Academy | not reported | not reported | not reported | not reported |
| Houston Christian High School | 9-12 | 507 | 10 | Christian (nondenominational) |
| Houston Quran Academy | K-12 | 326 | 10.3 | Islamic |
| Ilm Academy | PreK-8 | 155 | 6 | Islamic |
| Iman Academy Southeast | not reported | not reported | not reported | not reported |
| Iman Academy Southwest | PreK-12 | 396 | 13.2 | Islamic |
| Incarnate Word Academy | 9-12 | 248 | 8.3 | Roman Catholic, all-girls |
| Inspire Center | not reported | not reported | not reported | not reported |
| Institute for Girls Education, Dba Magnolia School | 1-8 | 137 | 4.8 | Nonsectarian, all-girls |
| Journey School of Houston | 1-7 | 10 | 3.3 | Nonsectarian |
| Kids R Kids #35 TX Lakeshore | PreK-K | 15 | 15 | Nonsectarian |
| Kings Academy | PreK-8 | 24 | 6.7 | Christian (nondenominational) |
| Knowledge-First Empowerment Academy | 6-12 | 115 | 13.5 | Nonsectarian |
| Light of Houston Bilingual Academy | not reported | not reported | not reported | not reported |
| Lutheran South Academy Houston | not reported | not reported | not reported | not reported |
| Lycee International de Houston | PreK-12 | 116 | 6.7 | Nonsectarian |
| Marian High School (Nti Career Institute) | 9-12 | 150 | 15 | Nonsectarian |
| Mariner Montessori | PreK-K | 16 | 5.3 | Nonsectarian |
| Melinda Webb School | PreK-K | 5 | 2.5 | Nonsectarian |
| Memorial Lutheran School | PreK-12 | 170 | 8.7 | Lutheran Church (Missouri Synod) |
| Meridian Academy (Digital Learning) | not reported | not reported | not reported | not reported |
| Mesivta of Houston | not reported | not reported | not reported | not reported |
| Molo Bilingual Montessori School | PreK-5 | 17 | not reported | Nonsectarian |
| Montessori School Downtown | K-2 | 17 | 8.5 | Nonsectarian |
| Montessori School of Downtown Clear Lake | not reported | not reported | not reported | not reported |
| Northland Christian School Pk-12 | PreK-12 | 421 | 8.3 | Christian (nondenominational) |
| One Hope Academy | not reported | not reported | not reported | not reported |
| Our Lady of Guadalupe School | PreK-8 | 195 | 15.9 | Roman Catholic |
| Primrose School | K | 18 | 18 | Nonsectarian |
| Primrose School of Eldridge Parkway | PreK-K | 7 | 7 | Nonsectarian |
| Primrose School of Upper Kirby | PreK-K | 9 | 9 | Nonsectarian |
| Rainard School | PreK-8 | 32 | 3.4 | Nonsectarian |
| Resurrection Catholic School | PreK-8 | 74 | 6.5 | Roman Catholic |
| River Oaks Academy | 3-12 | 38 | 3.5 | Nonsectarian |
| Robert M. Beren Academy | not reported | not reported | not reported | not reported |
| Robindell Private School | not reported | not reported | not reported | not reported |
| Saint Thomas High School | not reported | not reported | not reported | not reported |
| San Francisco Nativity Academy | PreK-5 | 96 | 13.7 | Christian (nondenominational) |
| School of the Woods | PreK-12 | 223 | 4.5 | Nonsectarian |
| Sherwood Forest Montessori School | PreK-K | 24 | 4 | Nonsectarian |
| St. Ambrose School | PreK-8 | 231 | 6.6 | Roman Catholic |
| St. Anne Catholic School | PreK-8 | 419 | 16.8 | Roman Catholic |
| St. Augustine Catholic School | PreK-8 | 100 | 8.4 | Roman Catholic |
| St. Catherine's Montessori | PreK-12 | 210 | 14.4 | Roman Catholic |
| St. Cecilia Catholic School - Houston | not reported | not reported | not reported | not reported |
| St. Christopher Catholic School | PreK-8 | 151 | 11.6 | Roman Catholic |
| St. Clare of Assisi Catholic School | PreK-8 | 101 | 7.2 | Roman Catholic |
| St. Elizabeth Ann Seton Catholic School | PreK-8 | 180 | 13.8 | Roman Catholic |
| St. Francis de Sales School | PreK-8 | 208 | 6.9 | Roman Catholic |
| St. Jerome Catholic School | PreK-8 | 125 | 8.9 | Roman Catholic |
| St. John Paul II Catholic School Houston | not reported | not reported | not reported | not reported |
| St. Mark Lutheran School Houston | not reported | not reported | not reported | not reported |
| St. Mary of the Purification Catholic School | PreK-5 | 90 | 7.9 | Roman Catholic |
| St. Michael Catholic School - Houston | PreK-8 | 426 | 11.2 | Roman Catholic |
| St. Nicholas School | PreK-5 | 4 | not reported | Roman Catholic |
| St. Peter Catholic High School | not reported | not reported | not reported | not reported |
| St. Pius X High School | 9-12 | 558 | 14 | Roman Catholic |
| St. Rose of Lima Catholic School | PreK-8 | 353 | 10.6 | Roman Catholic |
| St. Theresa Catholic School | PreK-8 | 311 | 10.7 | Roman Catholic |
| St. Thomas Episcopal School | PreK-12 | 563 | 10.8 | Episcopal |
| St. Thomas More Parish School | PreK-8 | 247 | 12.6 | Roman Catholic |
| St. Vincent de Paul Catholic School | PreK-8 | 470 | 16.3 | Roman Catholic |
| Strake Jesuit College Prep School | 9-12 | 1,390 | 10 | Roman Catholic, all-boys |
| Strong Tower Christian Academy | not reported | not reported | not reported | not reported |
| Texas Christian School | PreK-12 | 195 | 18.4 | Christian (nondenominational) |
| The Arbor School | not reported | not reported | not reported | not reported |
| The Banff School | PreK-12 | 169 | 8.1 | Nonsectarian |
| The Briarwood School | 1-11 | 272 | 2.9 | Nonsectarian |
| The Childrens Courtyard 3052 | PreK-Transitional K | 5 | 5 | Nonsectarian |
| The Gateway Academy | 6-12 | 76 | 3.2 | Nonsectarian |
| The Greenwood Preschool | PreK-Transitional K | 12 | 12 | Nonsectarian |
| The Imani School | PreK-8 | 219 | 9.2 | Christian (nondenominational) |
| The Kipling School | K-8 | 120 | 7.1 | Nonsectarian |
| The Mays School | not reported | not reported | not reported | not reported |
| The Monarch School | not reported | not reported | not reported | not reported |
| The Paracletus School | not reported | not reported | not reported | not reported |
| The Parish School | PreK | 81 | 8.1 | Nonsectarian |
| The Saint Constantine School | PreK-12 | 458 | 11.2 | Other religious |
| The School for Young Children | K | 32 | 5.3 | Nonsectarian |
| The Tenney School | 6-12 | 69 | 5.6 | Nonsectarian |
| The Village School | PreK-12 | 1,565 | 10.5 | Nonsectarian |
| Torah Day School | PreK-8 | 114 | 8 | Jewish |
| Torah Girls Academy of Texas | 9-12 | 33 | 2.4 | Jewish, all-girls |
| Transformation Christian Academy | not reported | not reported | not reported | not reported |
| Van Houston Academy | K-12 | 171 | 9.5 | Nonsectarian |
| West Montessori School of Copperfield | K | 2 | not reported | Nonsectarian |
| Westbury Christian School | PreK-12 | 299 | 8 | Church of Christ |
| Westside Montessori School | PreK-8 | 94 | 7.3 | Nonsectarian |
| Westview School | PreK-8 | 96 | 4.4 | Nonsectarian |
| Xavier Educational Academy | 3-12 | 123 | 5.4 | Nonsectarian |
| Yellowstone Academy | PreK-5 | 215 | 8.6 | Christian (nondenominational) |
| Yeshiva Torat Emet | PreK-8 | 316 | 10.5 | Jewish |