For the 2025-26 school year, there are 10 private high schools belonging to Other school association(s) serving 1,191 students in Idaho. You can also find more schools membership associations in Idaho.
The top ranked private high schools belonging to Other school association(s) in Idaho include Acton Academy Twin Falls, Gem State Adventist Academy, and Lighthouse Christian School.
The average acceptance rate is 68%, which is lower than the Idaho private high school average acceptance rate of 85%.
40% of private high schools belonging to Other school association(s) in Idaho are religiously affiliated (most commonly Christian and Seventh Day Adventist).
Top Ranked Private High Schools Belonging to Other school association(s) in Idaho (2025-26)
School
Location
Quick Facts
Acton Academy Twin Falls![Acton Academy Twin Falls Photo Acton Academy Twin Falls Photo]()

Montessori School
1830 Addison Ave E
Twin Falls, ID 83301
(208) 420-9520
Twin Falls, ID 83301
(208) 420-9520
Gr: NS-10 | 36 students Avg. class size: 15 students Sports: 1 Tuition & acceptance rate listed
Gem State Adventist Academy
(Seventh Day Adventist)
16115 S Montana Ave
Caldwell, ID 83607
(208) 459-1627
Caldwell, ID 83607
(208) 459-1627
Gr: 9-12 | 60 students Avg. class size: 15 students
Lighthouse Christian School
(Christian)
960 Eastland Dr
Twin Falls, ID 83301
(208) 737-1425
Twin Falls, ID 83301
(208) 737-1425
Gr: PK-12 | 391 students Avg. class size: 20 students Sports: 8 Tuition listed
Northwest Childrens Home Education Center
Special Education School
602 13th St
Lewiston, ID 83501
(208) 746-8206
Lewiston, ID 83501
(208) 746-8206
Gr: 1-12 | 55 students Acceptance rate listed
Po Box 2118
Sun Valley, ID 83353
(208) 622-3960
Sun Valley, ID 83353
(208) 622-3960
Gr: PK-12 | 446 students Avg. class size: 15 students Sports: 21 | Extracurrculars: 11 Tuition & acceptance rate listed
1723 S. Horton St
Caldwell, ID 83605
(208) 546-0832
Caldwell, ID 83605
(208) 546-0832
Gr: 7-12 | 29 students Sports: 3 Tuition listed
Calvary Christian School![Calvary Christian School Photo - Coach giving direction Calvary Christian School Photo - Coach giving direction]()

(Christian)
1210 N Middleton Rd
Nampa, ID 83651
(208) 467-9114
Nampa, ID 83651
(208) 467-9114
Gr: K-11 | 81 students Avg. class size: 15 students Sports: 3 Tuition listed
Northwest Children's Home
Special Education School
419 22nd Ave
Lewiston, ID 83501
(208) 746-8206
Lewiston, ID 83501
(208) 746-8206
Gr: 3-12 | 53 students
Wisdom Ranch Vocational Gap Year
All-boys | Alternative School
4331 Champagne Creek Rd
Arco, ID 83213
(208) 527-8933
Arco, ID 83213
(208) 527-8933
Gr: 10-12 Avg. class size: 4 students
Recent Articles
Financial Aid Overlooked at Two-Year Colleges: What Private School Parents Should Know
Parents from private schools often miss key financial aid opportunities at two-year colleges. Discover what to know in 2025 for smart planning
How to Budget Tuition: Private School vs Community College Early Years
Learn how to budget and compare tuition for private school and community college during early years, with up-to-date strategies and insights for 2025.
Why Private-School Families Should Consider a Community College Start
A practical guide for private-school families exploring starting at a community college to save money, build flexibility and stay transfer-ready.



