Private School Review - Established 2003
Cole Valley Christian High School Top 3 · Most AP Courses (ID)
Zion Lutheran School Top 17 · Oldest Founding Date (ID)
Christian Center School Top 5 · Lowest Acceptance Rate (ID)

Best Idaho Private High Schools Belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) (2026-27)

For the 2026-27 school year, there are 13 private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) serving 5,268 students in Idaho. You can also find more schools membership associations in Idaho.
The top ranked private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho include Nampa Christian Schools, Cole Valley Christian High School, and Bishop Kelly High School.
The average tuition cost is $9,795, which is lower than the Idaho private high school average tuition cost of $11,401.
75% of private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho are religiously affiliated (most commonly Christian and Seventh Day Adventist).

Quick Facts (2026-27)

  • # Private Schools: 13

Quick Facts (2026-27)

  • # Private Schools: 13

Top Ranked Private High Schools Belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho (2026-27)

Map of Beacon Christian School
Beacon Christian School
Gr: K-10 | 35 students
Avg. class size: 11 students
Seventh Day Adventist
615 Stewart Ave
Lewiston, ID 83501
(208) 743-8361
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Bishop Kelly High School Photo
Bishop Kelly High School
Gr: 9-12 | 870 students
Avg. class size: 21 students
Sports: 19 | Extracurriculars: 32
Catholic
7009 Franklin Rd
Boise, ID 83709
(208) 375-6010
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Map of Centennial Baptist School
Centennial Baptist School
Gr: NS-12 | 240 students
Sports: 5
Christian
3610 E. Ustick Rd
Caldwell, ID 83605
(208) 454-1997
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Christian Center School Photo
Christian Center School
Gr: PK-12 | 239 students
Avg. class size: 20 students
Sports: 5 | Extracurriculars: 9
3639 W Prairie Ave
Hayden, ID 83835
(208) 772-7542
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Cole Valley Christian High School Photo
Cole Valley Christian High School
Gr: NS-12 | 1,517 students
Avg. class size: 24 students
Sports: 14 | Extracurriculars: 12
Christian
200 E Carlton Ave
Meridian, ID 83642
(208) 947-1212
(8)
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Greenleaf Friends Academy Photo
Greenleaf Friends Academy
Gr: PK-12 | 280 students
Avg. class size: 15 students
Sports: 5 | Extracurriculars: 1
Friends
20565 Academy Rd
Greenleaf, ID 83626
(208) 459-6346
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Nampa Christian Schools Photo
Nampa Christian Schools
Gr: NS-12 | 1,053 students
Avg. class size: 25 students
Sports: 15 | Extracurriculars: 2
Christian
11920 W. Flamingo Avenue
Nampa, ID 83651
(208) 475-1697
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The North Fork School Photo
The North Fork School
Gr: 3-12 | 15 students
Avg. class size: 6 students
Specialized Curriculum
812 Reedy Lane
Mccall, ID 83638
(208) 630-4028
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Project Patch School Photo
Project Patch School
Gr: 6-12 | 35 students
Extracurriculars: 6
Alternative School (Christian)
PO BOX 450
Garden Valley, ID 83622
(360) 690-8495
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Riverstone International School Photo
Riverstone International School
Gr: PK-12 | 355 students
Avg. class size: 15 students
Sports: 11 | Extracurriculars: 21
5521 E Warm Springs Ave
Boise, ID 83716
(208) 424-5000
(11)
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Watersprings School Photo
Watersprings School
Gr: PK-12 | 396 students
Avg. class size: 16 students
Sports: 7
Christian
4250 South 25th East
Idaho Falls, ID 83404
(208) 542-6250
(1)
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Zion Lutheran School Photo
Zion Lutheran School
Gr: K-11 | 49 students
Avg. class size: 10 students
Extracurriculars: 6
Lutheran Church Missouri Synod
1012 12th Avenue Rd
Nampa, ID 83686
(208) 466-9141
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Foothills School of Arts & Sciences Photo
Foothills School of Arts & Sciences
Gr: PK-9 | 158 students
Avg. class size: 13 students
Specialized Curriculum
601 South 9th Street
Boise, ID 83702
(208) 331-9260
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Frequently Asked Questions

What are the top ranked private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho?
The top ranked private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho include Nampa Christian Schools, Cole Valley Christian High School, and Bishop Kelly High School.
How many private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are located in Idaho?
13 private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are located in Idaho.
How much do private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) cost in Idaho?
The average tuition cost is $9,795, which is lower than the Idaho private school average tuition cost of $11,401.
How diverse are private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho?
Idaho private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are approximately 13% minority students, which is higher than the Idaho private school average of 11%.
What percentage of private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are religiously affiliated in Idaho?
75% of private high schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Idaho are religiously affiliated (most commonly Christian and Seventh Day Adventist).
12
Private Schools
5,268
Students
$9,795
Avg. Tuition
13%
Students of Color
12:1
Student-Teacher Ratio

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