#1 Most Diverse Private Schools in Boulder County, CO
Sacred Heart of Jesus School
Parish school · Grades Pre-K–8
Largest group: 58% of students
Boulder, CO
A+Overall grade169 students6 students per teacher
2026 lists
Most Diverse Private Schools in Boulder County, CO
Private schools in Boulder County, CO with the most varied mix of students. Top 13 of 13 schools.
#2 Most Diverse Private Schools in Boulder County, CO
St. John the Baptist Catholic School
Diocesan school · Grades Pre-K–8
Largest group: 62% of students
Longmont, CO
A+Overall grade185 students10 students per teacher
#3 Most Diverse Private Schools in Boulder County, CO
Shining Mtn. Waldorf High School
Independent school · Grades Pre-K–12
Largest group: 65% of students
Boulder, CO
AOverall grade188 students5 students per teacher
#4 Most Diverse Private Schools in Boulder County, CO
St. Louis Catholic School
Parish school · Grades Pre-K–8
Largest group: 72% of students
Louisville, CO
A+Overall grade93 students8 students per teacher
#5 Most Diverse Private Schools in Boulder County, CO
Bixby School
Independent school · Grades Pre-K–5
Largest group: 78% of students
Boulder, CO
A+Overall grade93 students4 students per teacher
#6 Most Diverse Private Schools in Boulder County, CO
Boulder Valley Waldorf School
Independent school · Grades Pre-K–8
Largest group: 81% of students
Niwot, CO
A-Overall grade95 students5 students per teacher
#7 Most Diverse Private Schools in Boulder County, CO
Boulder Country Day School
Independent school · Grades Pre-K–8
Largest group: 85% of students
Boulder, CO
B+Overall grade281 students6 students per teacher
#8 Most Diverse Private Schools in Boulder County, CO
Shining Mountain Waldorf School
Independent school · Grades Pre-K–12
Largest group: 85% of students
Boulder, CO
B-Overall grade170 students10 students per teacher
#9 Most Diverse Private Schools in Boulder County, CO
Friends School
Independent school · Grades Pre-K–8
Largest group: 87% of students
Boulder, CO
B-Overall grade134 students
#10 Most Diverse Private Schools in Boulder County, CO
Hillside School
Special education school · Grades 1–9
Largest group: 87% of students
Longmont, CO
B+Overall grade75 students6 students per teacher
#11 Most Diverse Private Schools in Boulder County, CO
Rocky Mountain Christian Academy
Christian school (nondenominational) · Grades Pre-K–8
Largest group: 91% of students
Niwot, CO
A-Overall grade98 students7 students per teacher
#12 Most Diverse Private Schools in Boulder County, CO
Watershed School
Independent school · Grades 6–12
Largest group: 93% of students
Boulder, CO
BOverall grade114 students7 students per teacher
#13 Most Diverse Private Schools in Boulder County, CO
Jarrow Montessori School
Montessori school · Grades Pre-K–6
Largest group: 96% of students
Boulder, CO
BOverall grade70 students8 students per teacher
From official public records, updated October 2026.