Riverstone International School Photo - Riverstone International School is the premier, IB day/boarding school in Boise for Preschool-Gr 12 students. The school's 14 acre campus is nestled between the Boise River and the Greenbelt in Southeast Boise.

Best Idaho Private High Schools Belonging to Northwest Association of Accredited Schools (2025-26)

For the 2025-26 school year, there are 5 private high schools belonging to Northwest Association of Accredited Schools serving 2,863 students in Idaho. You can also find more schools membership associations in Idaho.
The top ranked private high schools belonging to Northwest Association of Accredited Schools in Idaho include Riverstone International School, Cole Valley Christian High School, and Bishop Kelly High School.
The average acceptance rate is 90%, which is higher than the Idaho private high school average acceptance rate of 85%.
60% of private high schools belonging to Northwest Association of Accredited Schools in Idaho are religiously affiliated (most commonly Catholic and Christian).

Top Ranked Private High Schools Belonging to Northwest Association of Accredited Schools in Idaho (2025-26)

School
Location
Quick Facts
Cole Valley Christian High School
Cole Valley Christian High School Photo
(Christian)
(8)
200 E Carlton Ave
Meridian, ID 83642
(208) 947-1212
Gr: NS-12 | 1,452 student Avg. class size: 24 students Sports: 14 | Extracurrculars: 12 Tuition & acceptance rate listed
5521 E Warm Springs Ave
Boise, ID 83716
(208) 424-5000
Gr: PK-12 | 416 students Avg. class size: 15 students Sports: 10 | Extracurrculars: 21 Tuition & acceptance rate listed
Beacon Christian School
(Seventh Day Adventist)
615 Stewart Ave
Lewiston, ID 83501
(208) 743-8361
Gr: K-10 | 35 students Avg. class size: 11 students Tuition listed
Bishop Kelly High School
Bishop Kelly High School Photo
(Catholic)
7009 Franklin Rd
Boise, ID 83709
(208) 375-6010
Gr: 9-12 | 945 students Avg. class size: 21 students Sports: 19 | Extracurrculars: 32 Tuition & acceptance rate listed
The North Fork School
The North Fork School Photo - Hard work. Hard statistics. Open doors.
Special Program Emphasis
812 Reedy Lane
Mccall, ID 83638
(208) 630-4028
Gr: 3-12 | 15 students Avg. class size: 6 students Tuition & acceptance rate listed

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