17³Ô¹Ï

Casady School Photo - Casady School includes four divisions: Primary for Pre-K, Lower for grades 1-4, Middle for grades 5-8, and Upper for grades 9-12.

Top 5 Best Oklahoma 17³Ô¹Ïs Belonging to Independent Schools Association of the South West (ISAS) (2025)

For the 2025 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 Holland Hall, Casady School, and Heritage Hall.
The average acceptance rate is 58%, which is lower than the Oklahoma private school average acceptance rate of 83%.
40% of private schools belonging to Independent Schools Association of the South West (ISAS) in Oklahoma are religiously affiliated (most commonly Episcopal).

Top Ranked 17³Ô¹Ïs Belonging to Independent Schools Association of the South West (ISAS) in Oklahoma (2025)

School
Location
Grades
Students
Casady School
Casady School Photo - Casady School includes four divisions: Primary for Pre-K, Lower for grades 1-4, Middle for grades 5-8, and Upper for grades 9-12.
(Episcopal)
9500 N Pennsylvania Ave
Oklahoma City, OK 73120
(405) 749-3200
Grades: PK-12
| 1,049 students
Heritage Hall
Heritage Hall Photo
1800 NW 122nd Street
Oklahoma City, OK 73120
(405) 936-3009
Grades: PK-12
| 955 students
Holland Hall
Holland Hall Photo - More space to learn and grow. Here our Primary School students make some campfire S'Mores during an outdoor unit. S'More?! How can I have more when I haven't had any?! *Bonus points for knowing the quote*
(Episcopal)
5666 E 81st
Tulsa, OK 74137
(918) 481-1111
Grades: NS-12
| 1,032 students
2433 W 61st Street
Tulsa, OK 74132
(918) 446-3553
Grades: NS-12
| 616 students
Westminster School
600 NW 44th Street
Oklahoma City, OK 73118
(214) 796-1156
Grades: PK-8
| 598 students

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