#1 Largest Private Schools in Alameda County, CA
Bishop Odowd High School
Diocesan school · Grades 9–12
1,263 students
Oakland, CA
AOverall grade1,263 students16 students per teacher
2026 lists
Largest Private Schools in Alameda County, CA
The private schools in Alameda County, CA with the most students. Top 50 of 91 schools.
#2 Largest Private Schools in Alameda County, CA
The Quarry Lane School
Independent school · Grades Pre-K–12
975 students
Dublin, CA
B+Overall grade975 students8 students per teacher
#3 Largest Private Schools in Alameda County, CA
Head Royce School
Independent school · Grades K–12
906 students
Oakland, CA
A+Overall grade906 students11 students per teacher
#4 Largest Private Schools in Alameda County, CA
Moreau Catholic High School
Parish school · Grades 9–12
793 students
Hayward, CA
A+Overall grade793 students13 students per teacher
#5 Largest Private Schools in Alameda County, CA
St. Mary's College High School
Independent Catholic school · Grades 9–12
627 students
Berkeley, CA
BOverall grade627 students19 students per teacher
#6 Largest Private Schools in Alameda County, CA
California Crosspoint Academy
Christian school (nondenominational) · Grades Pre-K–12
500 students
Hayward, CA
AOverall grade500 students7 students per teacher
#7 Largest Private Schools in Alameda County, CA
Fremont Christian School
Assembly of God school · Grades Pre-K–12
448 students
Fremont, CA
BOverall grade448 students13 students per teacher
#8 Largest Private Schools in Alameda County, CA
Mission Hills Middle School
Independent school · Grades K–8
435 students
Union City, CA
B-Overall grade435 students22 students per teacher
#9 Largest Private Schools in Alameda County, CA
Redwood Day School
Independent school · Grades K–8
417 students
Oakland, CA
B-Overall grade417 students11 students per teacher
#10 Largest Private Schools in Alameda County, CA
Valley Christian Schools
Christian school (nondenominational) · Grades Pre-K–12
400 students
Dublin, CA
A+Overall grade400 students10 students per teacher
#11 Largest Private Schools in Alameda County, CA
Our Savior Lutheran
Lutheran (Missouri Synod) school · Grades K–8
397 students
Livermore, CA
A+Overall grade397 students10 students per teacher
#12 Largest Private Schools in Alameda County, CA
St. Joseph Notre Dame High School
Diocesan school · Grades 8–12
395 students
Alameda, CA
A+Overall grade395 students13 students per teacher
#13 Largest Private Schools in Alameda County, CA
Redwood Christian Middle School and High School
Christian school (nondenominational) · Grades 6–12
394 students
San Lorenzo, CA
A-Overall grade394 students16 students per teacher
#14 Largest Private Schools in Alameda County, CA
Prince of Peace Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
388 students
Fremont, CA
B+Overall grade388 students16 students per teacher
#15 Largest Private Schools in Alameda County, CA
The College Preparatory School
Independent school · Grades 9–12
367 students
Oakland, CA
A+Overall grade367 students8 students per teacher
#16 Largest Private Schools in Alameda County, CA
Park Day School
Independent school · Grades K–8
359 students
Oakland, CA
A+Overall grade359 students6 students per teacher
#17 Largest Private Schools in Alameda County, CA
Basis Independent Fremont Upper School
Independent school · Grades 6–12
358 students
Fremont, CA
B-Overall grade358 students11 students per teacher
#18 Largest Private Schools in Alameda County, CA
St. Pauls Episcopal School
Episcopal school · Grades K–8
351 students
Oakland, CA
A+Overall grade351 students9 students per teacher
#19 Largest Private Schools in Alameda County, CA
Cristo Rey De La Salle East Bay High School
Independent Catholic school · Grades 9–12
351 students
Oakland, CA
BOverall grade351 students16 students per teacher
#20 Largest Private Schools in Alameda County, CA
St. Paul's Day School
Episcopal school · Grades K–8
349 students
Oakland, CA
A+Overall grade349 students9 students per teacher
#21 Largest Private Schools in Alameda County, CA
Basis Independent Fremont
Independent school · Grades K–5
345 students
Fremont, CA
B-Overall grade345 students10 students per teacher
#22 Largest Private Schools in Alameda County, CA
Black Pine Circle School
Independent school · Grades K–8
319 students
Berkeley, CA
A-Overall grade319 students10 students per teacher
#23 Largest Private Schools in Alameda County, CA
BPC Upper School
Independent school · Grades K–8
319 students
Berkeley, CA
BOverall grade319 students10 students per teacher
#24 Largest Private Schools in Alameda County, CA
Ecole Bilingue De Berkeley
Independent school · Grades Pre-K–8
314 students
Berkeley, CA
B+Overall grade314 students9 students per teacher
From official public records, updated October 2026.