Marin Horizon School Photo - Marin Horizon is an independent, toddler through 8th grade, co-educational day school located in in Mill Valley, CA, only 15 minutes from San Francisco. Nestled at the base of Mt. Tamalpais, our beautiful campus is surrounded by trails and open space.

Best Mill Valley Private Preschools (2026)

For the 2026 school year, there are 3 private preschools serving 432 students in Mill Valley, CA.
The top-ranked private preschool in Mill Valley, CA is Marin Horizon School.

Top-Ranked Mill Valley Private Preschools (2026)

School
Location
Quick Facts
Marin Horizon School
Marin Horizon School Photo - Marin Horizon is an independent, toddler through 8th grade, co-educational day school located in in Mill Valley, CA, only 15 minutes from San Francisco. Nestled at the base of Mt. Tamalpais, our beautiful campus is surrounded by trails and open space.
(8)
305 Montford Ave
Mill Valley, CA 94941
(415) 388-8408
Gr: NS-8 | 318 students Avg. class size: 16 students Sports: 5 | Extracurrculars: 13 Tuition listed
Guidepost Montessori at Mill Valley
Guidepost Montessori at Mill Valley Photo
Montessori School
270 Miller Ave
Mill Valley, CA 94941
(442) 267-6305
Gr: NS-K | 37 students Tuition listed
Ross Academy Montessori School
Montessori School
7 Thomas Dr
Mill Valley, CA 94941
(415) 383-5777
Gr: PK-K | 77 students Avg. class size: 12 students Tuition listed
[+] Show Closed Private Schools in Mill Valley, California

Mill Valley, California Private Schools (Closed)

School
Location
Quick Facts
70 Lomita Dr
Mill Valley, CA 94941
(415) 381-8183
Gr: K-8 | 99 students

Overview

This Town (Mill Valley)
This State (CA)
# Schools
3 Schools

Student Body:

# Students
432 Students
362,895 Students
% Average Students of Color
27%
50%

Academics and Faculty:

# Teachers
75 Teachers
26,807 Teachers
Average Student-Teacher Ratio
6:1
14:1
% Average Faculty w/Advanced Degree
8%
58%
Average Class Size
14 students
18 students

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$23,490
$15,751
Average % on Financial Aid
32%
25%

Students by Ethnicity:

0.59
0.70
# American Indian Students
1 Student
1,687 Students
% American Indian Students
n/a
n/a
# Asian Students
5 Students
30,543 Students
% Asian Students
2%
9%
# Hispanic Students
14 Students
43,579 Students
% Hispanic Students
5%
13%
# Black Students
9 Students
12,236 Students
% Black Students
3%
3%
# White Students
144 Students
112,761 Students
% White Students
45%
33%
# Hawaiian Students
1 Student
2,016 Students
% Hawaiian Students
n/a
1%
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
144 Students
143,453 Students
% of Others Students
45%
41%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
13 extracurriculars
7 extracurriculars
Average Number of Sports
5 sports
6 sports

Frequently Asked Questions

What are the top-ranked private preschools in Mill Valley, CA?
The top-ranked private preschools in Mill Valley, CA is Marin Horizon School.
How many private preschools are located in Mill Valley?
3 private preschools are located in Mill Valley.
Which private preschools in Mill Valley are often viewed compared to one another?

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