#1 Fastest-Growing Private Schools in Sonoma County, CA
Anova Center for Education Sonoma County
Special education school · Grades 2–12
Enrollment up 90% in about a decade
Santa Rosa, CA
BOverall grade133 students11 students per teacher
2026 lists
Fastest-Growing Private Schools in Sonoma County, CA
Private schools in Sonoma County, CA whose enrollment has grown the most over the past decade. Top 7 of 7 schools.
#2 Fastest-Growing Private Schools in Sonoma County, CA
The Healdsburg School
Independent school · Grades K–8
Enrollment up 52% in about a decade
Healdsburg, CA
B+Overall grade234 students8 students per teacher
#3 Fastest-Growing Private Schools in Sonoma County, CA
Greenacre Homes
Special education school · Grades 2–12
Enrollment up 46% in about a decade
Sebastopol, CA
A-Overall gradeAll boys57 students8 students per teacher
#4 Fastest-Growing Private Schools in Sonoma County, CA
Sonoma Academy
Independent school · Grades 9–12
Enrollment up 43% in about a decade
Santa Rosa, CA
BOverall grade340 students
#5 Fastest-Growing Private Schools in Sonoma County, CA
St. John the Baptist Catholic School
Diocesan school · Grades K–8
Enrollment up 33% in about a decade
Healdsburg, CA
BOverall grade293 students22 students per teacher
#6 Fastest-Growing Private Schools in Sonoma County, CA
Sonoma Country Day School
Independent school · Grades Pre-K–8
Enrollment up 24% in about a decade
Santa Rosa, CA
A+Overall grade280 students7 students per teacher
#7 Fastest-Growing Private Schools in Sonoma County, CA
Harvest Christian School
Christian school (nondenominational) · Grades Pre-K–8
Enrollment up 20% in about a decade
Petaluma, CA
BOverall grade172 students15 students per teacher
From official public records, updated October 2026.