North Bridge Academy Photo - NCA offers a four-year Spanish program.

Best Mill Valley Private Schools (2026)

For the 2026 school year, there are 7 private schools serving 872 students in Mill Valley, CA (there are 7 public schools, serving 3,822 public students). 19% of all K-12 students in Mill Valley, CA are educated in private schools (compared to the CA state average of 10%).
The top-ranked private schools in Mill Valley, CA include Marin Horizon School, Terra Marin School, and North Bridge Academy.
The average acceptance rate is 30%, which is lower than the California private school average acceptance rate of 81%.

Top-Ranked Mill Valley Private Schools (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
Mount Tamalpais School
Mount Tamalpais School Photo - Mount Tamalpais School is a co-educational day school enrolling children in Kindergarten through Grade 8. The school is dedicated to the active pursuit of knowledge, integrity, and fairness.
(3)
100 Harvard Ave
Mill Valley, CA 94941
(415) 383-9434
Gr: K-8 | 268 students Avg. class size: 14 students Sports: 4 | Extracurrculars: 12 Tuition listed
North Bridge Academy
North Bridge Academy Photo - NCA offers a four-year Spanish program.
Special Program Emphasis
(2)
17 Buena Vista AveMill Valley, CA 94941
Mill Valley, CA 94941
(415) 462-5657
Gr: 2-8 Avg. class size: 12 students Extracurrculars: 3 Tuition & acceptance rate listed
Terra Marin School
Terra Marin School Photo - The front of Terra Marin School.
(2)
70 Lomita Dr
Mill Valley, CA 94941
(415) 906-2220
Gr: K-8 | 117 students Avg. class size: 11 students Tuition & acceptance rate 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
Kumara School
Daycare / Preschool
540 Marin Ave
Mill Valley, CA 94941
(415) 388-5437
Gr: K-1 | 55 students
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
7 Schools

Student Body:

# Students
872 Students
665,486 Students
% Average Students of Color
35%
51%

Academics and Faculty:

# Teachers
140 Teachers
55,529 Teachers
Average Student-Teacher Ratio
6:1
12:1
% Average Faculty w/Advanced Degree
53%
59%
Average Class Size
13 students
17 students

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$33,596
$18,037
Average % on Financial Aid
43%
29%
Average Financial Aid Grant
$25,000
$8,884
Average Acceptance Rate
30%
81%
Average Endowment Size
$3.4 million
$33.91 million

Students by Ethnicity:

0.77
0.74
# American Indian Students
50 Students
3,583 Students
% American Indian Students
7%
n/a
# Asian Students
41 Students
72,174 Students
% Asian Students
5%
11%
# Hispanic Students
216 Students
104,621 Students
% Hispanic Students
28%
16%
# Black Students
35 Students
30,465 Students
% Black Students
5%
5%
# White Students
227 Students
236,378 Students
% White Students
30%
37%
# Hawaiian Students
1 Student
5,515 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
188 Students
189,984 Students
% of Others Students
25%
30%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
9 extracurriculars
9 extracurriculars
Average Number of Sports
5 sports
7 sports

Frequently Asked Questions

What are the top-ranked private schools in Mill Valley, CA?
The top-ranked private schools in Mill Valley, CA include Marin Horizon School, Terra Marin School, and North Bridge Academy.
How many private schools are located in Mill Valley?
7 private schools are located in Mill Valley.
How diverse are private schools in Mill Valley?
Mill Valley private schools are approximately 35% minority students, which is lower than the California private school average of 51%.
What percentage of students in Mill Valley go to private school?
19% of all K-12 students in Mill Valley are educated in private schools (compared to the CA state average of 10%).
Which private schools in Mill Valley are often viewed compared to one another?

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