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Dartmoor School
Eastside Catholic School Top 8 · Most AP Courses (WA)
The Little School Top 18 · 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 Annie Wright Schools, Saint George's School, and St. Thomas School.
The average tuition cost is $29,366, which is higher than the Washington private school average tuition cost of $15,804.
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)
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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)
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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)
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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)
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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
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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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)
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Show 14 more private schools in Washington (out of 49 total schools)
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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 Annie Wright Schools, Saint George's School, and St. Thomas 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 $15,804.
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

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