Washington Private Schools Belonging to Northwest Association of Independent Schools (NWAIS)

For the 2026-27 school year, there are 69 private schools belonging to Northwest Association of Independent Schools (NWAIS) serving 16,912 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 Saint George's School, Annie Wright Schools, and Charles Wright Academy.
The average tuition cost is $32,249, which is higher than the Washington private school average tuition cost of $15,480.
12% of private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington are religiously affiliated (most commonly Catholic and Jewish).

Quick Facts (26-27)

  • # Private Schools: 69

Quick Facts (26-27)

  • # Private Schools: 69

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

Charles Wright Academy Photo
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)
Map of Eastside Catholic School
Gr: 6-12 | 826 students
Avg. class size: 22 students
Sports: 15 | Extracurriculars: 31
Catholic
232 228th Avenue SE
Sammamish, WA 98074
(425) 295-3000
(7)
Epiphany School Photo
Gr: PK-5 | 260 students
Sports: 1 | Extracurriculars: 5
3611 E Denny Way
Seattle, WA 98122
(206) 323-9011
(8)
The Little School Photo
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)
St. Thomas School Photo
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)
Silverwood School Photo
Gr: K-8 | 95 students
Avg. class size: 20 students
Extracurriculars: 6
14000 Central Valley Rd NW
Poulsbo, WA 98370
(360) 697-7526
(27)
Dartmoor School Photo
Gr: 1-12 | 23 students
Avg. class size: 1 student
Alternative School
22500 SE 64th PL, #150
Bellevue, WA 98027
(425) 885-6296
(1)
Dartmoor School Photo
Gr: 1-12 | 37 students
Avg. class size: 1 student
Alternative School
6515 15th Ave NE
Seattle, WA 98115
(425) 885-6296
Seattle Waldorf School Photo
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)
Annie Wright Schools Photo
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)
Bertschi School Photo
Gr: PK-5 | 268 students
Avg. class size: 20 students
Sports: 2
2227 10th Avenue E
Seattle, WA 98102
(206) 442-6856
Map of Eastside Catholic High School
Gr: 6-12 | 862 students
Catholic
232 228th Ave Se
Sammamish, WA 98074
(425) 295-3024
Eton School Photo
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)
The Evergreen School Photo
Gr: NS-8 | 554 students
Avg. class size: 18 students
Sports: 7 | Extracurriculars: 10
Specialized Curriculum
15201 Meridian Avenue N
Seattle, WA 98133
(206) 957-1523
(7)
French American School of Puget Sound Photo
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)
Hamlin Robinson School Photo
Gr: 1-8 | 430 students
Avg. class size: 15 students
Sports: 4 | Extracurriculars: 6
Special Education School
1701 20th Ave S
Seattle, WA 98144
(206) 763-1167
(3)
Holy Names Academy Photo
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
(4)
The Island School Photo
Gr: PK-5 | 87 students
Avg. class size: 12 students
8553 NE Day Road
Bainbridge Island, WA 98110
(206) 842-0400
(12)
KapKa Cooperative Elementary School Photo
Gr: K-5 | 51 students
Avg. class size: 11 students
Extracurriculars: 10
510 N 49th St
Seattle, WA 98103
(206) 522-0350
(7)
The Kineo School Photo
Gr: K-5 | 13 students
Avg. class size: 12 students
Special Education School
7525 132nd Ave NE
Kirkland, WA 98033
(425) 394-9378
(8)
Lake Washington Girls Middle School Photo
Gr: 6-8 | 95 students
Avg. class size: 14 students
Sports: 8 | Extracurriculars: 8
All-girls
2100 S. Walker Street
Seattle, WA 98144
(206) 709-3800
(6)
Map of Lakeside Middle School
Gr: 5-8 | 273 students
Avg. class size: 17 students
13510 1st Ave Ne
Seattle, WA 98125
(206) 368-3630
Map of Lakeside School
Gr: 1-8 | 142 students
Avg. class size: 17 students
Sports: 15 | Extracurriculars: 24
Amish
14050 1st Avenue NE
Seattle, WA 98125
(260) 593-3209
(1)
North Seattle French School Photo
Gr: NS-5 | 104 students
Sports: 3 | Extracurriculars: 5
Specialized Curriculum
18560 1ST AVE NE
Seattle, WA 98155
(206) 365-1034
(5)
Map of 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)
Northwest Yeshiva High School Photo
Gr: 9-12 | 65 students
Avg. class size: 12 students
Sports: 5 | Extracurriculars: 11
Jewish
5017 90th Avenue SE
Mercer Island, WA 98040
(206) 232-5272
(8)
Open Window School Photo
Gr: K-8 | 370 students
Avg. class size: 19 students
Sports: 4 | Extracurriculars: 5
6128 168th Place SE
Bellevue, WA 98006
(425) 747-2911
(3)
Saint George's School Photo
Gr: K-12 | 330 students
Avg. class size: 12 students
Sports: 16 | Extracurriculars: 16
2929 W Waikiki Road
Spokane, WA 99208
(509) 464-8744
(2)
Seattle Academy Photo
Gr: 6-12 | 772 students
Avg. class size: 18 students
Sports: 13 | Extracurriculars: 25
Specialized Curriculum
1201 E Union Street
Seattle, WA 98122
(206) 323-6600
(1)
Map of Seattle Academy Of Arts&sciences Middle School Campus
Gr: 6-12 | 936 students
1432 15th Ave
Seattle, WA 98122
(206) 676-6815
Seattle Country Day School Photo
Gr: K-8 | 420 students
Avg. class size: 18 students
Sports: 12 | Extracurriculars: 7
Specialized Curriculum
2619 4th Ave N
Seattle, WA 98109
(206) 812-8907
(2)
Seattle Jewish Community School Photo
Gr: K-5 | 63 students
Avg. class size: 13 students
Jewish
7217 Woodlawn Ave. NE
Seattle, WA 98115
(206) 522-5212
Map of University Child Development School
Gr: PK-5 | 351 students
Avg. class size: 19 students
Sports: 1
5062 9th Ave Ne
Seattle, WA 98105
(206) 547-8237
(2)
UPrep Photo
Gr: 6-12 | 781 students
Avg. class size: 18 students
Sports: 8 | Extracurriculars: 15
8000 25th Ave NE
Seattle, WA 98115
(206) 525-2714
(10)
Villa Academy Photo
Gr: PK-8 | 383 students
Avg. class size: 20 students
Sports: 6 | Extracurriculars: 20
Catholic
5001 Ne 50th Street
Seattle, WA 98105
(206) 524-8885
(5)
Show 34 more private schools in Washington (out of 69 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 Saint George's School, Annie Wright Schools, and Charles Wright Academy.
How many private schools belonging to Northwest Association of Independent Schools (NWAIS) are located in Washington?
69 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 $32,249, which is higher than the Washington private school average tuition cost of $15,480.
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 38% 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?
12% of private schools belonging to Northwest Association of Independent Schools (NWAIS) in Washington are religiously affiliated (most commonly Catholic and Jewish).

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