Cedar River Montessori School (2026 Profile)

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Quick Facts (2026)

School Type: Montessori School
Grades: Prekindergarten-8
Enrollment: 135 students
Yearly Tuition: $19,980
Average class size: 20 students
Application Deadline: Jan. 31 / rolling
Source: ✓Verified school update

School Facts

School Type

Montessori School

School Membership(s)School Assoc.

American Montessori Society (AMS)
National Association of Independent Schools (NAIS)

Religious Affiliation

Nonsectarian

Grades Offered

Grades Prekindergarten-8

Students By Grade

View Data

Distribution of Students By Grade
Grade	Cedar River Montessori School
Pre-K	41
Kind	19
1	16
2	11
3	9
4	9
5	7
6	9
7	5
8	9

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Year Founded

1981

Summer School Offered

Yes

Summer Program Details

View Summer Program Details

School Calendar

View School Calendar

Campus Size

12 acres

Student Body

Total Students

135 students

Student Body Type

Co-ed

% Students of Color

19%

State avg.: 32%

Academics & Faculty

Total Classroom Teachers

15 teachers

Student-Teacher Ratio

9:1

National avg.: 11:1

% Faculty w/Advanced Degree

28%

Average Class Size

20 students

Classroom Dress Code

Casual

Tuition & Acceptance Rate

Admission Deadline

Jan. 31 / rolling

Yearly Tuition Cost

$19,980

View national tuition avg.

% on Financial Aid

21%

Admissions Director

Melinda Woodard

Admissions Associate

CRMS Info

Application URL

Online Application

Extracurriculars

Total ExtracurricularsTotal Extra-curric.

4 extracurriculars

ExtracurricularsExtra-curric.

according to student interestarts

Musicsports

School Notes

To submit an admissions inquiry to the Director of Admissions directly, visit cedarrivermontessori.org and submit an inquiry in the lower left hand corner of our main page. Located on 12 acres of forested wetland and pasture, Cedar River Montessori is a private, independent, nonprofit 501(c)(3) Montessori school for students ages 3 through middle school in Renton, WA. Cedar River Montessori School fosters the innate curiosity of the child, presenting learning experiences that cultivate independent, creative thinkers who continuously build their understanding of themselves and the world around them..

CRMS serves 130 students ages 3- 14 (8th grade).
We have three primary-level classes (ages 3 - kindergarten). Each class has 20 students and two adults.
We have two lower elementary classes with 37 students total (grades 1-3) with two teachers and two assistants.
We have an upper elementary class of 20 students with a teacher and an assistant.
We have a middle school program with room for 16 students in grades 7-8
We are located 3 miles east of I-405 off the Maple Valley highway and our students come from Renton, Seattle, Kent, Maple Valley, Issaquah, and surrounding communities.
We are a not-for-profit 501(c)(3) organization.

Source: Verified school update

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Frequently Asked Questions

How much does Cedar River Montessori School cost?

Cedar River Montessori School's tuition is approximately $19,980 for private students.

Does Cedar River Montessori School offer a summer program?

Yes, Cedar River Montessori School offers a summer program. Visit their summer school page for more information.

When is the application deadline for Cedar River Montessori School?

The application deadline for Cedar River Montessori School is Jan. 31 / rolling (applications are due on Jan. 31 but additional applications are reviewed year-round as space permits ).

School Reviews

5 2/14/2013

I love this school, it has a wonderful community of parents, teachers, and children. My son is so happy here and the students are kind, thoughtful, and caring.

- Posted by Parent - lelio

Endorse Cedar River Montessori School. Endorsements should be a few sentences in length. Please include any comments on:

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Did You Know?

The average private school tuition in Renton, WA is $16,282 for elementary schools (read more about average private school tuition across the country).