Private School Review - Established 2003
Eastside Catholic School Top 8 · Most AP Courses (WA)
Charles Wright Academy Top 3 · Largest Endowment (WA)
St. Thomas School Top 10 · Lowest Acceptance Rate (WA)

Best Washington Private Schools Belonging to Northwest Association of Independent Schools (NWAIS) (2026-27)

For the 2026-27 school year, there are 49 private schools belonging to Northwest Association of Independent Schools (NWAIS) serving 11,914 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington include Holy Names Academy, Charles Wright Academy, and Saint George's School.
The average tuition cost is $29,366, which is higher than the Washington private school average tuition cost of $15,116.
10% of private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington are religiously affiliated (most commonly Catholic and Jewish).

Quick Facts (2026-27)

  • # Private Schools: 49

Quick Facts (2026-27)

  • # Private Schools: 49

Top Ranked Private Schools Belonging to Northwest Association of Independent Schools (NWAIS) in Washington (2026-27)

Charles Wright Academy Photo
Charles Wright Academy
Gr: PK-12 | 578 students
Avg. class size: 14 students
Sports: 11 | Extracurriculars: 47
7723 Chambers Creek Rd W University Place
University Place, WA 98467
(253) 620-8373
(6)
View Profile
Eastside Catholic School Photo
Eastside Catholic School
Gr: 6-12 | 836 students
Avg. class size: 19 students
Sports: 19 | Extracurriculars: 22
Catholic
232 228th Avenue SE
Sammamish, WA 98074
(425) 295-3000
(7)
View Profile
The Little School Photo
The Little School
Gr: PK-5 | 232 students
Avg. class size: 15 students
Sports: 2 | Extracurriculars: 3
2812 116th Ave NE
Bellevue, WA 98004
(425) 827-8708
(10)
View Profile
Map of The Northwest School
The Northwest School
Gr: 6-12 | 446 students
Avg. class size: 17 students
Sports: 6 | Extracurriculars: 14
1415 Summit Ave
Seattle, WA 98122
(206) 816-6032
(10)
View Profile
St. Thomas School Photo
St. Thomas School
Gr: PK-8 | 368 students
Avg. class size: 18 students
Sports: 6 | Extracurriculars: 9
8300 NE 12th Street
Medina, WA 98039
(425) 454-5880
(8)
View Profile
Silverwood School Photo
Silverwood School
Gr: K-8 | 87 students
Avg. class size: 20 students
Extracurriculars: 6
14000 Central Valley Rd NW
Poulsbo, WA 98370
(360) 697-7526
(27)
View Profile
Dartmoor School Photo
Dartmoor School
Gr: 1-12 | 37 students
Avg. class size: 1 student
Alternative School
6515 15th Ave NE
Seattle, WA 98115
(425) 885-6296
View Profile
Dartmoor School Photo
Dartmoor School
Gr: 1-12 | 23 students
Avg. class size: 1 student
Alternative School
22500 SE 64th PL, #150
Bellevue, WA 98027
(425) 885-6296
(1)
View Profile
Seattle Waldorf School Photo
Seattle Waldorf School
Gr: NS-8 | 184 students
Avg. class size: 22 students
Sports: 4 | Extracurriculars: 9
Specialized Curriculum
2728 NE 100th Street
Seattle, WA 98125
(206) 524-5320
(11)
View Profile
Annie Wright Schools Photo
Annie Wright Schools
Gr: NS-12 | 902 students
Avg. class size: 14 students
Sports: 8 | Extracurriculars: 30
827 N Tacoma Ave
Tacoma, WA 98403
(253) 272-2216
(2)
View Profile
Eton School Photo
Eton School
Gr: PK-8 | 312 students
Avg. class size: 18 students
Sports: 3 | Extracurriculars: 14
Montessori School
2701 Bellevue-Redmond Road
Bellevue, WA 98008
(425) 881-4230
(3)
View Profile
The Evergreen School Photo
The Evergreen School
Gr: NS-8 | 508 students
Avg. class size: 17 students
Sports: 6 | Extracurriculars: 10
Specialized Curriculum
15201 Meridian Avenue N
Seattle, WA 98133
(206) 957-1523
(7)
View Profile
French American School of Puget Sound Photo
French American School of Puget Sound
Gr: PK-8 | 473 students
Avg. class size: 18 students
Sports: 5
Specialized Curriculum
3795 East Mercer Way
Mercer Island, WA 98040
(206) 275-3533
(8)
View Profile
The Gardner School Of Arts & Sciences Photo
The Gardner School Of Arts & Sciences
Gr: PK-6 | 103 students
Avg. class size: 16 students
Specialized Curriculum
16413 NE 50th Ave
Vancouver, WA 98686
(360) 574-5752
(12)
View Profile
Hamlin Robinson School Photo
Hamlin Robinson School
Gr: 1-8 | 426 students
Avg. class size: 15 students
Sports: 4 | Extracurriculars: 6
Special Education School
1701 20th Ave S
Seattle, WA 98144
(206) 763-1167
(3)
View Profile
Holy Names Academy Photo
Holy Names Academy
Gr: 9-12 | 575 students
Avg. class size: 21 students
Sports: 17
All-girls (Catholic)
728 21st Ave E
Seattle, WA 98112
(206) 323-4272
(3)
View Profile
The Island School Photo
The Island School
Gr: PK-5 | 87 students
Avg. class size: 12 students
8553 NE Day Road
Bainbridge Island, WA 98110
(206) 842-0400
(12)
View Profile
KapKa Cooperative Elementary School Photo
KapKa Cooperative Elementary School
Gr: K-5 | 51 students
Avg. class size: 11 students
Extracurriculars: 10
510 N 49th St
Seattle, WA 98103
(206) 522-0350
(7)
View Profile
The Kineo School Photo
The Kineo School
Gr: K-5 | 13 students
Avg. class size: 12 students
Special Education School
7525 132nd Ave NE
Kirkland, WA 98033
(425) 394-9378
(8)
View Profile
North Seattle French School Photo
North Seattle French School
Gr: NS-5 | 104 students
Sports: 3 | Extracurriculars: 5
Specialized Curriculum
18560 1ST AVE NE
Seattle, WA 98155
(206) 365-1034
(5)
View Profile
Show 14 more private schools in Washington (out of 49 total schools)
Loading...

Frequently Asked Questions

What are the top ranked private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington?
The top ranked private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington include Holy Names Academy, Charles Wright Academy, and Saint George's School.
How many private schools belonging to Northwest Association of Independent Schools (NWAIS) are located in Washington?
49 private schools belonging to Northwest Association of Independent Schools (NWAIS) are located in Washington.
How much do private schools belonging to Northwest Association of Independent Schools (NWAIS) cost in Washington?
The average tuition cost is $29,366, which is higher than the Washington private school average tuition cost of $15,116.
How diverse are private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington?
Washington private schools belonging to Northwest Association of Independent Schools (NWAIS) are approximately 40% minority students, which is higher than the Washington private school average of 32%.
What percentage of private schools belonging to Northwest Association of Independent Schools (NWAIS) are religiously affiliated in Washington?
10% of private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington are religiously affiliated (most commonly Catholic and Jewish).
49
Private Schools
11,914
Students
$29,366
Avg. Tuition
40%
Students of Color
8:1
Student-Teacher Ratio

Recent Articles

When Your Child Outpaces the Private School Curriculum
When Your Child Outpaces the Private School Curriculum
Learn what parents can do when a child finishes private school coursework early, including acceleration, curriculum compacting, advanced classes, enrichment, and signs the school needs a new plan.
How Much Teacher Access Does Your Child Get?
How Much Teacher Access Does Your Child Get?
Learn how to evaluate teacher access at private schools, including extra-help time, advising, communication, academic support, and the questions families should ask before choosing a school today.
When a Private School Teacher Leaves Midyear
When a Private School Teacher Leaves Midyear
When a private school teacher leaves midyear, parents need clear answers. Learn what schools should do, what children may experience, and when a departure signals deeper concerns.

Quick Links

SCHOOL SEARCH TOOLS:
SCHOOL BY TYPE (WA):
OPEN-HOUSES & JOBS:
PUBLIC & BOARDING SCHOOLS:
PRIVATE SCHOOL DATA:

Most Popular Articles

Paying for Private School: 7 Options
Paying for Private School: 7 Options
 School Rankings by Category
School Rankings by Category
Understanding Support Services in Private Schools
Understanding Support Services in Private Schools

More Articles

Well-Rounded Achievements
Expert School Views
Strategic School Choices
Global Educator Empowerment
Premier School Models