#1 Most Diverse Private Schools in Contra Costa County, CA
Bay Christian School
Assembly of God school · Grades Pre-K–8
Largest group: 25% of students
Concord, CA
BOverall grade255 students19 students per teacher
2026 lists
Most Diverse Private Schools in Contra Costa County, CA
Private schools in Contra Costa County, CA with the most varied mix of students. Top 50 of 51 schools.
#2 Most Diverse Private Schools in Contra Costa County, CA
Spectrum Center- Antioch Campus
Special education school · Grades 1–12
Largest group: 26% of students
Antioch, CA
B+Overall grade57 students10 students per teacher
#3 Most Diverse Private Schools in Contra Costa County, CA
Golestan School
Independent school · Grades Pre-K–5
Largest group: 30% of students
El Cerrito, CA
AOverall grade53 students6 students per teacher
#4 Most Diverse Private Schools in Contra Costa County, CA
Cornerstone Christian School
Assembly of God school · Grades Pre-K–12
Largest group: 34% of students
Antioch, CA
B-Overall grade559 students18 students per teacher
#5 Most Diverse Private Schools in Contra Costa County, CA
Holy Rosary Elementary School
Diocesan school · Grades Pre-K–8
Largest group: 34% of students
Antioch, CA
A-Overall grade313 students19 students per teacher
#6 Most Diverse Private Schools in Contra Costa County, CA
Hilltop Christian School
Christian school (nondenominational) · Grades K–8
Largest group: 34% of students
Antioch, CA
B+Overall grade137 students17 students per teacher
#7 Most Diverse Private Schools in Contra Costa County, CA
Pleasant Hill Adventist Academy
Seventh-day Adventist school · Grades K–12
Largest group: 34% of students
Pleasant Hill, CA
A+Overall grade114 students10 students per teacher
#8 Most Diverse Private Schools in Contra Costa County, CA
Heritage Baptist Academy
Baptist school · Grades K–12
Largest group: 34% of students
Antioch, CA
AOverall grade80 students12 students per teacher
#9 Most Diverse Private Schools in Contra Costa County, CA
Kings Valley Christian School
Christian school (nondenominational) · Grades Pre-K–8
Largest group: 35% of students
Concord, CA
AOverall grade361 students15 students per teacher
#10 Most Diverse Private Schools in Contra Costa County, CA
The Athenian School
Independent school · Grades 6–12
Largest group: 37% of students
Danville, CA
A+Overall grade537 students8 students per teacher
#11 Most Diverse Private Schools in Contra Costa County, CA
Queen of All Saints School
Diocesan school · Grades Pre-K–8
Largest group: 38% of students
Concord, CA
B+Overall grade287 students21 students per teacher
#12 Most Diverse Private Schools in Contra Costa County, CA
St. Agnes Elementary School
Parish school · Grades K–8
Largest group: 38% of students
Concord, CA
A+Overall grade261 students10 students per teacher
#13 Most Diverse Private Schools in Contra Costa County, CA
Contra Costa Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
Largest group: 39% of students
Walnut Creek, CA
AOverall grade335 students12 students per teacher
#14 Most Diverse Private Schools in Contra Costa County, CA
St. Joseph Elementary School
Diocesan school · Grades Pre-K–8
Largest group: 39% of students
Pinole, CA
B+Overall grade322 students26 students per teacher
#15 Most Diverse Private Schools in Contra Costa County, CA
Calvary Christian
Christian school (nondenominational) · Grades 1–12
Largest group: 39% of students
Concord, CA
A+Overall grade56 students6 students per teacher
#16 Most Diverse Private Schools in Contra Costa County, CA
Salesian College Preparatory
Diocesan school · Grades 9–12
Largest group: 40% of students
Richmond, CA
B+Overall grade413 students15 students per teacher
#17 Most Diverse Private Schools in Contra Costa County, CA
St. Francis of Assisi
Diocesan school · Grades K–8
Largest group: 40% of students
Concord, CA
A+Overall grade300 students17 students per teacher
#18 Most Diverse Private Schools in Contra Costa County, CA
St. Catherine of Siena School
Diocesan school · Grades Pre-K–8
Largest group: 41% of students
Martinez, CA
A+Overall grade143 students17 students per teacher
#19 Most Diverse Private Schools in Contra Costa County, CA
El Sobrante Christian School
Assembly of God school · Grades K–8
Largest group: 41% of students
El Sobrante, CA
A+Overall grade95 students11 students per teacher
#20 Most Diverse Private Schools in Contra Costa County, CA
Crestmont School
Independent school · Grades K–8
Largest group: 41% of students
Richmond, CA
AOverall grade51 students9 students per teacher
#21 Most Diverse Private Schools in Contra Costa County, CA
East Bay Montessori
Montessori school · Grades K–8
Largest group: 43% of students
El Cerrito, CA
AOverall grade68 students7 students per teacher
#22 Most Diverse Private Schools in Contra Costa County, CA
Bentley School
Independent school · Grades K–12
Largest group: 45% of students
Lafayette, CA
AOverall grade634 students8 students per teacher
#23 Most Diverse Private Schools in Contra Costa County, CA
Golden Hills Christian School
Christian school (nondenominational) · Grades K–8
Largest group: 45% of students
Brentwood, CA
B+Overall grade218 students17 students per teacher
#24 Most Diverse Private Schools in Contra Costa County, CA
Carondelet High School
Independent Catholic school · Grades 9–12
Largest group: 46% of students
Concord, CA
A+Overall gradeAll girls834 students8 students per teacher
From official public records, updated October 2026.