Best Oklahoma Private High Schools Belonging to Independent Schools Association of the South West (ISAS) (2025-26)
For the 2025-26 school year, there are 4 private high schools belonging to Independent Schools Association of the South West (ISAS) serving 3,652 students in Oklahoma. You can also find more schools membership associations in Oklahoma.
The top ranked private high schools belonging to Independent Schools Association of the South West (ISAS) in Oklahoma include Holland Hall, Casady School, and Heritage Hall.
50% of private high schools belonging to Independent Schools Association of the South West (ISAS) in Oklahoma are religiously affiliated (most commonly Episcopal).
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