Private School Review - Established 2003
Heritage Hall Top 6 · Most AP Courses (OK)
Casady School Top 3 · Lowest Acceptance Rate (OK)
Holland Hall Top 3 · Highest Avg. SAT Score (OK)

Oklahoma Private Schools Belonging to National Association of Independent Schools (NAIS)

For the 2026-27 school year, there are 6 private schools belonging to National Association of Independent Schools (NAIS) serving 3,369 students in Oklahoma. You can also find more schools membership associations in Oklahoma.
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma include Heritage Hall, Casady School, and Holland Hall.
The average acceptance rate is 76%, which is lower than the Oklahoma private school average acceptance rate of 89%.
67% of private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma are religiously affiliated (most commonly Episcopal and Christian).

Quick Facts (26-27)

  • # Private Schools: 6

Quick Facts (26-27)

  • # Private Schools: 6

Top Ranked Private Schools Belonging to National Association of Independent Schools (NAIS) in Oklahoma (2026-27)

Casady School Photo
Casady School
Gr: PK-12 | 1,049 students
Avg. class size: 13 students
Sports: 15 | Extracurriculars: 9
Episcopal
9500 N Pennsylvania Ave
Oklahoma City, OK 73120
(405) 749-3200
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Heritage Hall Photo
Heritage Hall
Gr: PK-12 | 955 students
Avg. class size: 13 students
Sports: 13 | Extracurriculars: 12
1800 NW 122nd Street
Oklahoma City, OK 73120
(405) 936-3009
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Holland Hall Photo
Holland Hall
Gr: NS-12 | 1,032 students
Avg. class size: 18 students
Sports: 16 | Extracurriculars: 22
Episcopal
5666 E 81st
Tulsa, OK 74137
(918) 481-1111
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Map of Mission Academy
Mission Academy
Gr: 9-12 | 9 students
Avg. class size: 10 students
7101 N. Classen
Oklahoma City, OK 73116
(405) 843-9100
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Map of St. John Christian Heritage Academy
St. John Christian Heritage Academy
Gr: PK-5 | 76 students
Christian
5700 N Kelley Ave
Oklahoma City, OK 73111
(405) 478-8607
(1)
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Map of St. Marys Episcopal School
St. Marys Episcopal School
Gr: NS-5 | 248 students
Avg. class size: 15 students
Sports: 5 | Extracurriculars: 7
Episcopal
505 E Covell Rd
Edmond, OK 73034
(405) 341-9541
(1)
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Frequently Asked Questions

What are the top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma?
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma include Heritage Hall, Casady School, and Holland Hall.
How many private schools belonging to National Association of Independent Schools (NAIS) are located in Oklahoma?
6 private schools belonging to National Association of Independent Schools (NAIS) are located in Oklahoma.
How diverse are private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma?
Oklahoma private schools belonging to National Association of Independent Schools (NAIS) are approximately 27% minority students, which is same as the Oklahoma private school average of 27%.
What percentage of private schools belonging to National Association of Independent Schools (NAIS) are religiously affiliated in Oklahoma?
67% of private schools belonging to National Association of Independent Schools (NAIS) in Oklahoma are religiously affiliated (most commonly Episcopal and Christian).
6
Private Schools
3,369
Students
$12,530
Avg. Tuition
27%
Students of Color
8:1
Student-Teacher Ratio

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