#1 Best Private High Schools in Sonoma County, CA
St. Vincent De Paul High School
Parish school · Grades 9–12
Smaller classes than 81% of Catholic schools in California
Petaluma, CA
A+Overall grade169 students9 students per teacher
2026 lists
Best Private High Schools in Sonoma County, CA
Private high schools in Sonoma County, CA with the highest overall grades. Top 6 of 6 schools.
#2 Best Private High Schools in Sonoma County, CA
Rio Lindo Adventist Academy
Seventh-day Adventist school · Grades 9–12
The only Christian school in Healdsburg
Healdsburg, CA
A+Overall grade113 students7 students per teacher
#3 Best Private High Schools in Sonoma County, CA
Cardinal Newman High School
Diocesan school · Grades 9–12
The smallest classes of any Catholic school in Santa Rosa
Santa Rosa, CA
A+Overall grade550 students11 students per teacher
#4 Best Private High Schools in Sonoma County, CA
Sonoma Academy
Independent school · Grades 9–12
The largest independent school in Santa Rosa
Santa Rosa, CA
BOverall grade340 students
#5 Best Private High Schools in Sonoma County, CA
Summerfield Waldorf School and Farm
Independent school · Grades Pre-K–12
Serving families in Santa Rosa since at least 2011
Santa Rosa, CA
BOverall grade225 students9 students per teacher
#6 Best Private High Schools in Sonoma County, CA
Grace Christian Academy
Christian school (nondenominational) · Grades K–12
The largest Christian school in Santa Rosa
Santa Rosa, CA
B-Overall grade189 students14 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.