#1 Largest Private Schools in Napa, CA
Justin-Siena
Independent Catholic school · Grades 9–12
654 students
Napa, CA
A+Overall grade654 students14 students per teacher
2026 lists
Largest Private Schools in Napa, CA
The private schools in Napa, CA with the most students. Top 6 of 6 schools.
#2 Largest Private Schools in Napa, CA
St. Apollinaris School
Diocesan school · Grades Pre-K–8
332 students
Napa, CA
BOverall grade332 students21 students per teacher
#3 Largest Private Schools in Napa, CA
St. John's Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–8
227 students
Napa, CA
BOverall grade227 students15 students per teacher
#4 Largest Private Schools in Napa, CA
Blue Oak School
Alternative school · Grades Pre-K–8
186 students
Napa, CA
AOverall grade186 students8 students per teacher
#5 Largest Private Schools in Napa, CA
Veritas Christian Academy
Christian school (nondenominational) · Grades Pre-K–8
124 students
Napa, CA
A+Overall grade124 students10 students per teacher
#6 Largest Private Schools in Napa, CA
Sunrise Montessori of Napa Valley
Montessori school · Grades Pre-K–5
42 students
Napa, CA
AOverall grade42 students3 students per teacher
From official public records, updated October 2026.