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.

Top 3 Best Idaho Private Schools Belonging to National Association of Independent Schools (NAIS) (2025)

For the 2025 school year, there are 5 private schools belonging to National Association of Independent Schools (NAIS) serving 1,595 students in Idaho. You can also find more schools membership associations in Idaho.
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Idaho include Riverstone International School, Sun Valley Community School, and Genesis Preparatory Academy.
The average acceptance rate is 77%, which is lower than the Idaho private school average acceptance rate of 89%.
20% of private schools belonging to National Association of Independent Schools (NAIS) in Idaho are religiously affiliated (most commonly Christian).

Top Ranked Private Schools Belonging to National Association of Independent Schools (NAIS) in Idaho (2025)

School
Location
Grades
Students
5521 E Warm Springs Ave
Boise, ID 83716
(208) 424-5000
Grades: PK-12
| 416 students
Genesis Preparatory Academy
(Christian)
(1)
1866 N Cecil Rd Bldg 2
Post Falls, ID 83854
(208) 691-0712
Grades: PK-12
| 501 students
Po Box 2118
Sun Valley, ID 83353
(208) 622-3960
Grades: PK-12
| 446 students
Foothills School of Arts & Sciences
Foothills School of Arts & Sciences Photo - Foothills students become capable and confident learners during their time at Foothills! Foothills allows students to share their voice, empowers them to become critical thinkers and open-minded listeners, and promotes a positive school culture where everyone is valued.
Special Program Emphasis
601 South 9th Street
Boise, ID 83702
(208) 331-9260
Grades: PK-9
| 158 students
1480 S 500 W
Driggs, ID 83422
(208) 354-7898
Grades: PK-8
| 74 students

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