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For the 2025-26 school year, there are 4 private high schools belonging to National Association of Independent Schools (NAIS) serving 3,045 students in Oklahoma. You can also find more schools membership associations in Oklahoma.

The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in Oklahoma include Mission Academy, Casady School, and Holland Hall.

The average acceptance rate is 69%, which is lower than the Oklahoma private high school average acceptance rate of 79%.

50% of private high schools belonging to National Association of Independent Schools (NAIS) in Oklahoma are religiously affiliated (most commonly Episcopal).