#1 Most Diverse Private Schools in Ada County, ID
A Child's Choice Montessori School
Montessori school · Grades Pre-K–6
Largest group: 44% of students
Meridian, ID
AOverall grade52 students6 students per teacher
2026 lists
Most Diverse Private Schools in Ada County, ID
Private schools in Ada County, ID with the most varied mix of students. Top 16 of 16 schools.
#2 Most Diverse Private Schools in Ada County, 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
#3 Most Diverse Private Schools in Ada County, ID
Calvary Meridian Prep Academy
Christian school (nondenominational) · Grades K–10
Largest group: 54% of students
Meridian, ID
BOverall grade185 students15 students per teacher
#4 Most Diverse Private Schools in Ada County, ID
St. Marys School
Diocesan school · Grades Pre-K–8
Largest group: 67% of students
Boise, ID
A+Overall grade109 students6 students per teacher
#5 Most Diverse Private Schools in Ada County, ID
St. Marks Elementary School
Parish school · Grades Pre-K–8
Largest group: 72% of students
Boise, ID
AOverall grade323 students14 students per teacher
#6 Most Diverse Private Schools in Ada County, ID
St. Ignatius Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 74% of students
Meridian, ID
B-Overall grade428 students18 students per teacher
#7 Most Diverse Private Schools in Ada County, ID
Riverstone International School
Independent school · Grades Pre-K–12
Largest group: 74% of students
Boise, ID
A+Overall grade349 students5 students per teacher
#8 Most Diverse Private Schools in Ada County, ID
One Stone
Independent school · Grades 9–12
Largest group: 77% of students
Boise, ID
BOverall grade87 students36 students per teacher
#9 Most Diverse Private Schools in Ada County, ID
Bishop Kelly High School
Diocesan school · Grades 9–12
Largest group: 78% of students
Boise, ID
BOverall grade967 students16 students per teacher
#10 Most Diverse Private Schools in Ada County, ID
Joshua Institute Academy
Special education school · Grades 3–12
Largest group: 80% of students
Meridian, ID
BOverall grade56 students8 students per teacher
#11 Most Diverse Private Schools in Ada County, 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
#12 Most Diverse Private Schools in Ada County, ID
Calvary Christian School
Christian school (nondenominational) · Grades Pre-K–8
Largest group: 85% of students
Boise, ID
BOverall grade223 students13 students per teacher
#13 Most Diverse Private Schools in Ada County, 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
#14 Most Diverse Private Schools in Ada County, ID
Sacred Heart Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 91% of students
Boise, ID
BOverall grade195 students15 students per teacher
#15 Most Diverse Private Schools in Ada County, ID
Montessori Academy
Montessori school · Grades Pre-K–6
Largest group: 92% of students
Eagle, ID
B+Overall grade62 students10 students per teacher
#16 Most Diverse Private Schools in Ada County, ID
Cole Valley Christian Schools-Secondary
Christian school (nondenominational) · Grades Pre-K–12
Largest group: 93% of students
Meridian, ID
B-Overall grade1,263 students16 students per teacher
From official public records, updated October 2026.