#1 Best Private High Schools in Contra Costa County, CA
Carondelet High School
Independent Catholic school · Grades 9–12
The smallest classes of any Catholic school in Concord
Concord, CA
A+Overall gradeAll girls834 students8 students per teacher
2026 lists
Best Private High Schools in Contra Costa County, CA
Private high schools in Contra Costa County, CA with the highest overall grades. Top 8 of 8 schools.
#2 Best Private High Schools in Contra Costa County, CA
De La Salle High School
Independent Catholic school · Grades 9–12
The largest Catholic school in Concord
Concord, CA
A+Overall gradeAll boys1,042 students13 students per teacher
#3 Best Private High Schools in Contra Costa County, CA
The Athenian School
Independent school · Grades 6–12
The only independent school in Danville
Danville, CA
A+Overall grade537 students8 students per teacher
#4 Best Private High Schools in Contra Costa County, CA
Bentley School
Independent school · Grades K–12
100% of graduates go to four-year colleges
Lafayette, CA
AOverall grade634 students8 students per teacher
#5 Best Private High Schools in Contra Costa County, CA
Contra Costa Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
Growing: enrollment up 31% since 2011–12
Walnut Creek, CA
AOverall grade335 students12 students per teacher
#6 Best Private High Schools in Contra Costa County, CA
Salesian College Preparatory
Diocesan school · Grades 9–12
Serving families in Richmond since at least 2011
Richmond, CA
B+Overall grade413 students15 students per teacher
#7 Best Private High Schools in Contra Costa County, CA
Berean Christian High School
Christian school (nondenominational) · Grades 9–12
85% of graduates go to four-year colleges
Walnut Creek, CA
BOverall grade380 students14 students per teacher
#8 Best Private High Schools in Contra Costa County, CA
Cornerstone Christian School
Assembly of God school · Grades Pre-K–12
The largest Christian school in Antioch
Antioch, CA
B-Overall grade559 students18 students per teacher
Grades compare each school's official facts, such as class size, how long it has served families and where graduates go, with similar schools. They're a starting point: visit, ask questions and trust what you see.