Marin Horizon School
Independent school · Grades Pre-K–8
Mill Valley, CA
305 Montford Ave, Mill Valley, CA 94941
Overall grade: A
ChooseAPrivateSchool.com grade, from official facts compared with similar schools.
- A-Class size
- B+Years serving families
- A-Diversity
What stands out
- Small classes: about 7 students per teacher
- Serving families in Mill Valley since at least 2011
In Mill Valley, California, Marin Horizon School is an independent private school for students from pre-K through 8th grade. About 177 students attend, with roughly 7 students per teacher. The school day runs about 7 hours, 175 days a year.
At a glance
- Grades
- Grades Pre-K–8
- Students
- 177
- Teachers
- 25.4 (full-time equivalent)
- Students per teacher
- 7
- Boys and girls
- Coed · 82 girls, 95 boys
- Religious affiliation
- None (nonsectarian)
- School day
- About 7 hours
- School year
- 175 days
- Library
- Yes
Reviews
Be the first to share what you love about Marin Horizon School.
How it compares
- Smaller classes than 58% of independent elementary schools in California (7 students per teacher).
- Larger than 65% of independent elementary schools in California.
- Compared with 280 independent elementary schools in California.
Students by survey year
Total students reported in official records since 2011–12.
Students by grade
Student body
Member of
- National Association of Independent Schools
- A state or regional independent school association
Questions to ask on a tour
- What is tuition, and what does it include (books, fees, uniforms, trips)?
- Do you offer financial aid, sibling discounts or payment plans?
- Do you accept ESA, voucher or tax-credit scholarship funds?
- How big are classes in my child's grade?
- What support is there for students who need extra help or more challenge?
- Is the school accredited, and by whom?
- What do a typical day and a typical week look like?
- How does the school communicate with families?
Questions about Marin Horizon School
What grades does Marin Horizon School serve?
Marin Horizon School serves grades Pre-K–8.
How many students attend Marin Horizon School?
About 177 students, with 7 students per teacher, according to official records.
How much is tuition at Marin Horizon School?
Call the school to ask about tuition, financial aid and payment plans.
Official record · Updated October 2026 · Official search · Something wrong? Tell us
Other private schools nearby
North Bridge Academy
Special education school · Grades 2–8
The only special education school in Mill Valley
Mill Valley, CA0.7 mi
Mount Tamalpais School
Independent school · Grades K–8
The largest independent school in Mill Valley
Mill Valley, CA0.8 mi
Terra Marin School
Independent school · Grades Pre-K–8
Smaller classes than 97% of independent schools in California
Mill Valley, CA1.4 mi
Marin Primary & Middle School
Independent school · Grades Pre-K–8
Smaller classes than 82% of independent schools in California
Larkspur, CA2.3 mi
Chronos Academy
Independent school · Grades 1–8
Smaller classes than 86% of independent schools in California
Larkspur, CA2.4 mi
Corte Madera Montessori
Montessori school · Grades Pre-K–K
The only preschool in Corte Madera
Corte Madera, CA2.5 mi