For the 2026 school year, there are 6 private schools serving 939 students in Mercer Island, WA (there are , serving 3,975 public students). 19% of all K-12 students in Mercer Island, WA are educated in private schools (compared to the WA state average of 10%).
The top-ranked private schools in Mercer Island, WA include St. Monica Catholic School, Northwest Yeshiva High School, and French American School of Puget Sound.
The average acceptance rate is 60%, which is lower than the Washington private school average acceptance rate of 82%.
Top-Ranked Mercer Island 草榴社区 Schools (2026)
School
Location
Quick Facts
3795 East Mercer Way
Mercer Island, WA 98040
(206) 275-3533
Mercer Island, WA 98040
(206) 275-3533
Gr: PK-8 | 473 students Avg. class size: 18 students Sports: 5 Tuition & acceptance rate listed
5017 90th Avenue SE
Mercer Island, WA 98040
(206) 232-5272
Mercer Island, WA 98040
(206) 232-5272
Gr: 9-12 | 65 students Avg. class size: 12 students Sports: 5 | Extracurrculars: 11 Tuition listed
4320 87th Avenue SE
Mercer Island, WA 98040
(206) 232-5432
Mercer Island, WA 98040
(206) 232-5432
Gr: NS-12 | 262 students Avg. class size: 21 students Sports: 4 | Extracurrculars: 17 Tuition & acceptance rate listed
Creative Learning Center Llc
Montessori School
2760 73rd Ave Se
Mercer Island, WA 98040
(206) 232-8900
Mercer Island, WA 98040
(206) 232-8900
Gr: PK-K | 59 students
Early World Montessori
Montessori School
3027 80th Ave Se
Mercer Island, WA 98040
(206) 232-2400
Mercer Island, WA 98040
(206) 232-2400
Gr: PK-K | 73 students
9311 SE 36th St
Mercer Island, WA 98040
(206) 232-0059
Mercer Island, WA 98040
(206) 232-0059
Gr: 9-12 | 7 students Tuition listed
Mercer Island, Washington 草榴社区 Schools (Closed)
School
Location
Quick Facts
American Academy (Closed 2015)
(Christian)
7834 Se 32nd St
Mercer Island, WA 98040
(206) 230-5672
Mercer Island, WA 98040
(206) 230-5672
Gr: 1-12 | 25 students
Overview
This Town (Mercer Island)
This State (WA)
# Schools
6 Schools
Student Body:
# Students
939 Students
120,257 Students
% Average Students of Color
27%
31%
Academics and Faculty:
# Teachers
64 Teachers
10,030 Teachers
Average Student-Teacher Ratio
7:1
12:1
% Average Faculty w/Advanced Degree
90%
58%
Average Class Size
17 students
16 students
Average Number of AP Courses
6 courses
10 courses
Average SAT score
1380
(Out of 1600)
1265
Average ACT score
29
(Out of 36)
29
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$27,725
$15,674
Average % on Financial Aid
41%
28%
Average Financial Aid Grant
$15,900
$9,028
Average Acceptance Rate
60%
82%
Average Endowment Size
$2 million
$41.61 million
Students by Ethnicity:
Diversity Score
0.72
0.64
# American Indian Students
3 Students
1,228 Students
% American Indian Students
n/a
1%
# Asian Students
47 Students
9,040 Students
% Asian Students
5%
8%
# Hispanic Students
297 Students
6,307 Students
% Hispanic Students
30%
5%
# Black Students
22 Students
3,815 Students
% Black Students
2%
3%
# White Students
340 Students
59,141 Students
% White Students
35%
50%
# Hawaiian Students
n/a
651 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
273 Students
38,588 Students
% of Others Students
28%
32%
All Ethnic Groups
Extracurriculars and Sports:
Average Number of Extracurriculars
14 extracurriculars
8 extracurriculars
Average Number of Sports
5 sports
6 sports
Frequently Asked Questions
What are the top-ranked private schools in Mercer Island, WA?
The top-ranked private schools in Mercer Island, WA include St. Monica Catholic School, Northwest Yeshiva High School, and French American School of Puget Sound.
How many private schools are located in Mercer Island?
6 private schools are located in Mercer Island.
How diverse are private schools in Mercer Island?
Mercer Island private schools are approximately 27% minority students, which is lower than the Washington private school average of 31%.
What percentage of students in Mercer Island go to private school?
19% of all K-12 students in Mercer Island are educated in private schools (compared to the WA state average of 10%).
Recent Articles
The Social Fit Interview: Questions to Ask Students, Not Admissions
Discover how talking with current students can reveal a private school's true culture and help families assess social fit before enrolling.
AI Companions and Student Well-Being: What Parents Should Ask
Learn how AI companions may affect student well-being and discover the key questions parents should ask before embracing this emerging technology.
Is a Phone-Free 草榴社区 School Right for Your Child?
Explore the benefits, challenges, and key considerations of choosing a phone-free private school for your child in 2026.
