#1 Most Diverse Private Schools in Boise, ID
Boise State University Trio Upward Bound
Alternative school · Grades 9–11
Largest group: 50% of students
Boise, ID
A-Overall grade80 students6 students per teacher
2026 lists
Most Diverse Private Schools in Boise, ID
Private schools in Boise, ID with the most varied mix of students. Top 10 of 10 schools.
#2 Most Diverse Private Schools in Boise, ID
St. Marys School
Diocesan school · Grades Pre-K–8
Largest group: 67% of students
Boise, ID
A+Overall grade109 students6 students per teacher
#3 Most Diverse Private Schools in Boise, ID
St. Marks Elementary School
Parish school · Grades Pre-K–8
Largest group: 72% of students
Boise, ID
AOverall grade323 students14 students per teacher
#4 Most Diverse Private Schools in Boise, ID
Riverstone International School
Independent school · Grades Pre-K–12
Largest group: 74% of students
Boise, ID
A+Overall grade349 students5 students per teacher
#5 Most Diverse Private Schools in Boise, ID
One Stone
Independent school · Grades 9–12
Largest group: 77% of students
Boise, ID
BOverall grade87 students36 students per teacher
#6 Most Diverse Private Schools in Boise, ID
Bishop Kelly High School
Diocesan school · Grades 9–12
Largest group: 78% of students
Boise, ID
BOverall grade967 students16 students per teacher
#7 Most Diverse Private Schools in Boise, ID
St. Joseph's Catholic School
Diocesan school · Grades K–8
Largest group: 82% of students
Boise, ID
B+Overall grade367 students15 students per teacher
#8 Most Diverse Private Schools in Boise, ID
Calvary Christian School
Christian school (nondenominational) · Grades Pre-K–8
Largest group: 85% of students
Boise, ID
BOverall grade223 students13 students per teacher
#9 Most Diverse Private Schools in Boise, ID
Boise Valley Adventist School
Seventh-day Adventist school · Grades Pre-K–8
Largest group: 85% of students
Boise, ID
BOverall grade75 students13 students per teacher
#10 Most Diverse Private Schools in Boise, ID
Sacred Heart Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 91% of students
Boise, ID
BOverall grade195 students15 students per teacher
From official public records, updated October 2026.