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For the 2025-26 school year, there are 5 private schools belonging to Independent Schools Association of the South West (ISAS) serving 4,250 students in Oklahoma. You can also find more schools membership associations in Oklahoma.

The top ranked private schools belonging to Independent Schools Association of the South West (ISAS) in Oklahoma include Heritage Hall, Westminster School, and Casady School.

The average acceptance rate is 58%, which is lower than the Oklahoma private school average acceptance rate of 85%.

40% of private schools belonging to Independent Schools Association of the South West (ISAS) in Oklahoma are religiously affiliated (most commonly Episcopal).