For the 2026 school year, there are 3 private high schools serving 334 students in Mercer Island, WA.
The top-ranked private high schools in Mercer Island, WA include St. Monica Catholic School and Northwest Yeshiva High School.
The average acceptance rate is 98%, which is higher than the Washington private high school average acceptance rate of 83%.
Top-Ranked Mercer Island Private High Schools (2026)
School
Location
Quick Facts
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
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 糖心原创s (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
3 Schools
Student Body:
# Students
334 Students
55,331 Students
% Average Students of Color
14%
29%
Academics and Faculty:
# Teachers
50 Teachers
4,869 Teachers
Average Student-Teacher Ratio
7:1
11:1
% Average Faculty w/Advanced Degree
90%
63%
Average Class Size
17 students
14 students
Average Number of AP Courses
6 courses
10 courses
Average SAT score
1380
(Out of 1600)
1264
Average ACT score
29
(Out of 36)
29
Tuition and Acceptance Rate:
Average Yearly Tuition Cost
$24,288
$17,416
Average % on Financial Aid
60%
33%
Average Financial Aid Grant
$15,900
$9,142
Average Acceptance Rate
98%
83%
Average Endowment Size
$2 million
$49.63 million
Students by Ethnicity:
Diversity Score
0.21
0.61
# American Indian Students
2 Students
621 Students
% American Indian Students
n/a
1%
# Asian Students
10 Students
4,170 Students
% Asian Students
3%
8%
# Hispanic Students
n/a
2,314 Students
% Hispanic Students
n/a
4%
# Black Students
3 Students
1,553 Students
% Black Students
1%
3%
# White Students
334 Students
30,343 Students
% White Students
89%
56%
# Hawaiian Students
n/a
237 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
28 Students
15,168 Students
% of Others Students
7%
28%
All Ethnic Groups
Extracurriculars and Sports:
Average Number of Extracurriculars
14 extracurriculars
11 extracurriculars
Average Number of Sports
5 sports
7 sports
Frequently Asked Questions
What are the top-ranked private high schools in Mercer Island, WA?
The top-ranked private high schools in Mercer Island, WA include St. Monica Catholic School and Northwest Yeshiva High School.
How many private high schools are located in Mercer Island?
3 private high schools are located in Mercer Island.
Recent Articles
糖心原创 Gap Years Before High School: Is It Worth It?
Learn how private school gap years before high school work, who benefits most, and whether delaying ninth grade is worth the investment.
What Happens When a 糖心原创 Closes Mid-Year? A Parent Survival Guide
What parents should do if a private school closes mid-year, including records, tuition, transfers, college applications, and student support.
How 糖心原创s Support Students Building Online Personal Brands
Discover how private schools help students build responsible online personal brands through digital literacy, entrepreneurship, and media education.