| Oklahoma Christian School | Edmond | PreK-12 | 1,111 | 13.4 | Christian (nondenominational) |
| Crossings Christian School ✓ | Oklahoma City | PreK-12 | 1,050 | 12.4 | Christian (nondenominational) |
| Metro Christian Academy | Tulsa | PreK-12 | 1,040 | 12.2 | Christian (nondenominational) |
| Lincoln Christian School ✓ | Tulsa | PreK-12 | 937 | 11.2 | Christian (nondenominational) |
| Casady School ✓ | Oklahoma City | PreK-12 | 922 | 8 | Episcopal |
| The Academy of Classical Christian Midtown Campus | Oklahoma City | PreK-12 | 871 | 13.3 | Christian (nondenominational) |
| The Acad of Classical Chrn Studies | Oklahoma City | PreK-12 | 862 | 15.8 | Christian (nondenominational) |
| The Academy of Classical Christian Studies ✓ | Oklahoma City | PreK-12 | 859 | 12.9 | Christian (nondenominational) |
| Christian Heritage Academy ✓ | Del City | K-12 | 640 | 15.2 | Christian (nondenominational) |
| Summit Christian Academy | Broken Arrow | PreK-12 | 638 | 12.6 | Assembly of God |
| Oklahoma Christian Academy | Edmond | PreK-12 | 547 | 9.1 | Church of Christ |
| Wesleyan Christian School ✓ | Bartlesville | PreK-12 | 305 | 12.2 | Christian (nondenominational) |
| Owasso Preparatory Academy ✓ | Owasso | PreK-12 | 304 | 19.5 | Christian (nondenominational) |
| Legacy Christian School | Durant | PreK-12 | 234 | 8.4 | Christian (nondenominational) |
| Wright Christian Academy ✓ | Tulsa | PreK-12 | 209 | 10.2 | Christian (nondenominational) |
| Holy Trinity Lutheran School ✓ | Edmond | PreK-8 | 195 | 8.9 | Lutheran Church (Missouri Synod) |
| Oklahoma Bible Academy ✓ | Enid | 6-12 | 190 | 7.8 | Baptist |
| Eagle Point Christian Academy ✓ | Sapulpa | PreK-12 | 181 | 7.4 | Christian (nondenominational) |
| St. Marys Episcopal School ✓ | Edmond | PreK-5 | 172 | 4.5 | Episcopal |
| Immanuel Lutheran Christian Academy ✓ | Broken Arrow | K-12 | 170 | 10.6 | Lutheran Church (Missouri Synod) |
| Trinity School ✓ | Oklahoma City | 1-12 | 164 | 7.2 | Christian (nondenominational) |
| Hillsdale Christian School ✓ | Hillsdale | PreK-12 | 159 | 9.9 | Christian (nondenominational) |
| Western Oklahoma Christian School ✓ | Clinton | PreK-6 | 158 | 7 | Christian (nondenominational) |
| Kings Gate Christian School ✓ | Yukon | PreK-11 | 158 | 7.2 | Christian (nondenominational) |
| Emmanuel Christian School ✓ | Enid | PreK-5 | 157 | 10.5 | Baptist |
| Lakewood Christian School ✓ | McAlester | K-12 | 148 | 8 | Christian (nondenominational) |
| Warm World School | Oklahoma City | PreK-Transitional K | 143 | 13.6 | Methodist |
| Life Christian Academy ✓ | Nicoma Park | PreK-12 | 130 | 7.8 | Christian (nondenominational) |
| Crossover Preparatory Academy ✓ | Tulsa | 6-12 | 130 | 8.1 | Christian (nondenominational) |
| Victory Family School ✓ | Norman | PreK-8 | 126 | 9.3 | Christian (nondenominational) |
| Stillwater Christian School ✓ | Stillwater | PreK-10 | 126 | 8.8 | Christian (nondenominational) |
| William Bradford Christian School ✓ | Pryor | PreK-12 | 125 | 7.2 | Christian (nondenominational) |
| Cornerstone Christian Academy ✓ | Sperry | PreK-12 | 120 | 6.2 | Christian (nondenominational) |
| First Lutheran School ✓ | Ponca City | PreK-8 | 118 | 9.1 | Lutheran Church (Missouri Synod) |
| Oak Hall Episcopal School ✓ | Ardmore | PreK-8 | 117 | 9.1 | Episcopal |
| Lighthouse Christian Academy ✓ | Tulsa | K-12 | 102 | 12.8 | Pentecostal |
| The Little Light House ✓ | Tulsa | PreK-K | 99 | 33 | Christian (nondenominational) |
| Drexel Academy ✓ | Tulsa | PreK-5 | 98 | 14 | Christian (nondenominational) |
| Tulsa Adventist Academy ✓ | Tulsa | PreK-12 | 96 | 11.4 | Seventh-Day Adventist |
| Altus Christian Academy ✓ | Altus | PreK-8 | 93 | 8.2 | Christian (nondenominational) |