Private School Review - Established 2003
The Gardner School Of Arts & Sciences Photo - The Gardner School campus sits on five beautiful acres of land in rural Clark County, easily accessible from I-5 and I-205. The grounds offer children the opportunity to explore, play, and learn in a safe, natural setting
The Gardner School Of Arts & Sciences

Best Washington Private Schools Belonging to NWAIS (Northwest Association of Independent Schools) (2025-26)

For the 2025-26 school year, there are 47 private schools belonging to NWAIS (Northwest Association of Independent Schools) serving 11,815 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private schools belonging to NWAIS (Northwest Association of Independent Schools) in Washington include Annie Wright Schools, Holy Names Academy, and Charles Wright Academy.
The average tuition cost is $28,519, which is higher than the Washington private school average tuition cost of $15,687.
11% of private schools belonging to NWAIS (Northwest Association of Independent Schools) in Washington are religiously affiliated (most commonly Catholic and Jewish).

Top Ranked Private Schools Belonging to NWAIS (Northwest Association of Independent Schools) in Washington (2025-26)

School
Location
Quick Facts
Charles Wright Academy
Charles Wright Academy Photo - Charles Wright Academy's Lower School, Middle School, and Upper School are home to more than 550 students from age 30 months to 12th grade. All three schools are situated on a beautiful, wooded 107-acre campus in University Place.
(6)
7723 Chambers Creek Rd W University Place
University Place, WA 98467
(253) 620-8373
Gr: NS-12 | 578 students Avg. class size: 14 students Sports: 10 | Extracurrculars: 47 Tuition & acceptance rate listed
Eastside Catholic School
Eastside Catholic School Photo - The Eastside Catholic School campus is situated on 50 acres on Sammamish plateau and surrounded by protected wetlands and forest.
(Catholic)
(7)
232 228th Avenue SE
Sammamish, WA 98074
(425) 295-3000
Gr: 6-12 | 836 students Avg. class size: 19 students Sports: 19 | Extracurrculars: 22 Tuition & acceptance rate listed
The Little School
The Little School Photo
(9)
2812 116th Ave NE
Bellevue, WA 98004
(425) 827-8708
Gr: PK-5 | 232 students Avg. class size: 15 students Sports: 2 | Extracurrculars: 3 Tuition & acceptance rate listed
St. Thomas School
St. Thomas School Photo
(5)
8300 NE 12th Street
Medina, WA 98039
(425) 454-5880
Gr: PK-8 | 330 students Avg. class size: 18 students Sports: 6 | Extracurrculars: 9 Tuition & acceptance rate listed
UPrep
UPrep Photo
(9)
8000 25th Ave NE
Seattle, WA 98115
(206) 525-2714
Gr: 6-12 | 746 students Avg. class size: 18 students Sports: 8 | Extracurrculars: 7 Tuition listed
Seattle Waldorf School
Seattle Waldorf School Photo
Special Program Emphasis
(10)
2728 NE 100th Street
Seattle, WA 98125
(206) 524-5320
Gr: NS-8 | 138 students Avg. class size: 22 students Sports: 4 | Extracurrculars: 9 Tuition & acceptance rate listed
Silverwood School
Silverwood School Photo - Welcome to Silverwood School!
(26)
14000 Central Valley Rd NW
Poulsbo, WA 98370
(360) 697-7526
Gr: K-8 | 87 students Avg. class size: 20 students Extracurrculars: 3 Tuition & acceptance rate listed
Annie Wright Schools
Annie Wright Schools Photo - Founded in 1884, Annie Wright Schools are nestled in the beautiful North End neighborhood of Tacoma, Washington. Our historic campus includes an indoor pool, two gyms, science and technology labs, art and music studios, theater, outdoor gardens, play areas, athletic fields and open spaces.
(2)
827 N Tacoma Ave
Tacoma, WA 98403
(253) 272-2216
Gr: NS-12 | 838 students Avg. class size: 17 students Sports: 9 | Extracurrculars: 27 Tuition listed
The Evergreen School
The Evergreen School Photo
Special Program Emphasis
(7)
15201 Meridian Avenue N
Seattle, WA 98133
(206) 957-1523
Gr: NS-8 | 508 students Avg. class size: 17 students Sports: 6 | Extracurrculars: 10 Tuition & acceptance rate listed
French American School of Puget Sound
French American School of Puget Sound Photo - Playground at the main campus in Mercer Island
Special Program Emphasis
(8)
3795 East Mercer Way
Mercer Island, WA 98040
(206) 275-3533
Gr: PK-8 | 473 students Avg. class size: 18 students Sports: 5 Tuition & acceptance rate listed
French Immersion School Of Washington
French Immersion School Of Washington Photo - A Preschool Teacher and her student are playing with a toy in class.
Special Program Emphasis
(14)
4211 W Lake Sammamish Parkway Se
Bellevue, WA 98008
(425) 407-5695
Gr: NS-8 | 223 students Avg. class size: 16 students Sports: 9 | Extracurrculars: 14 Tuition & acceptance rate listed
The Gardner School Of Arts & Sciences
The Gardner School Of Arts & Sciences Photo - The Gardner School campus sits on five beautiful acres of land in rural Clark County, easily accessible from I-5 and I-205. The grounds offer children the opportunity to explore, play, and learn in a safe, natural setting
Special Program Emphasis
(12)
16413 NE 50th Ave
Vancouver, WA 98686
(360) 574-5752
Gr: PK-6 | 103 students Avg. class size: 16 students Tuition & acceptance rate listed
Hamlin Robinson School
Hamlin Robinson School Photo
Special Education School
(3)
1701 20th Ave S
Seattle, WA 98144
(206) 763-1167
Gr: 1-8 | 426 students Avg. class size: 15 students Sports: 2 | Extracurrculars: 6 Tuition & acceptance rate listed
Holy Names Academy
Holy Names Academy Photo
All-girls (Catholic)
(3)
728 21st Ave E
Seattle, WA 98112
(206) 323-4272
Gr: 9-12 | 575 students Avg. class size: 21 students Sports: 17 Tuition & acceptance rate listed
https://www.etonschool.org
https://www.etonschool.org Photo - Students at Eton School love to learn!
Montessori School
(3)
2701 Bellevue-Redmond Road
Bellevue, WA 98008
(425) 881-4230
Gr: PK-8 | 353 students Avg. class size: 20 students Sports: 2 | Extracurrculars: 14 Tuition listed
The Island School
The Island School Photo - Art students draw the cherry tree at our school entrance.
(12)
8553 NE Day Road
Bainbridge Island, WA 98110
(206) 842-0400
Gr: K-5 | 89 students Avg. class size: 16 students Tuition & acceptance rate listed
Kapka Cooperative School
Kapka Cooperative School Photo - Kindergarten lessons involve small group learning between lots of outdoor time to play and learn SEL skills.
(7)
510 N 49th St
Seattle, WA 98103
(206) 522-0350
Gr: K-5 | 72 students Avg. class size: 14 students Tuition & acceptance rate listed
The Kineo School
The Kineo School Photo - THIS IS LEARNING SET IN MOTION
Special Education School
(8)
7525 132nd Ave NE
Kirkland, WA 98033
(425) 394-9378
Gr: K-5 | 13 students Avg. class size: 12 students Tuition & acceptance rate listed
North Seattle French School
North Seattle French School Photo - Field trips
Special Program Emphasis
(5)
18560 1ST AVE NE
Seattle, WA 98155
(206) 365-1034
Gr: NS-5 | 104 students Sports: 3 | Extracurrculars: 5 Tuition listed
The Northwest School
(10)
1415 Summit Ave
Seattle, WA 98122
(206) 816-6032
Gr: 6-12 | 446 students Avg. class size: 17 students Sports: 6 | Extracurrculars: 14 Tuition & acceptance rate listed
Northwest Yeshiva High School
Northwest Yeshiva High School Photo
(Jewish)
(8)
5017 90th Avenue SE
Mercer Island, WA 98040
(206) 232-5272
Gr: 9-12 | 65 students Avg. class size: 12 students Sports: 5 | Extracurrculars: 11 Tuition listed
Open Window School
Open Window School Photo - We challenge, support, and trust students to do real work that matters and has an impact beyond the classroom.
(3)
6128 168th Place SE
Bellevue, WA 98006
(425) 747-2911
Gr: K-8 | 370 students Avg. class size: 19 students Sports: 4 | Extracurrculars: 5 Tuition & acceptance rate listed
Saint George's School
Saint George's School Photo - Saint George's 120-acre campus is located along the Little Spokane River just north of Spokane, Washington.
(2)
2929 W Waikiki Road
Spokane, WA 99208
(509) 466-1636
Gr: K-12 | 311 students Avg. class size: 12 students Sports: 10 | Extracurrculars: 16 Tuition & acceptance rate listed
Seattle Country Day School
Seattle Country Day School Photo
Special Program Emphasis
(2)
2619 4th Ave N
Seattle, WA 98109
(206) 812-8907
Gr: K-8 | 420 students Avg. class size: 18 students Sports: 12 | Extracurrculars: 7 Tuition listed
Soundview School
Soundview School Photo
Special Program Emphasis
(2)
6515 196th St SW
Lynnwood, WA 98036
(425) 778-8572
Gr: NS-8 | 159 students Avg. class size: 18 students Sports: 2 | Extracurrculars: 7 Tuition & acceptance rate listed
Spruce Street School
Spruce Street School Photo
(4)
914 Virginia Street
Seattle, WA 98101
(206) 621-9211
Gr: K-5 | 111 students Avg. class size: 18 students Sports: 1 Tuition & acceptance rate listed
Villa Academy
Villa Academy Photo
(Catholic)
(5)
5001 Ne 50th Street
Seattle, WA 98105
(206) 524-8885
Gr: PK-8 | 383 students Avg. class size: 20 students Sports: 6 | Extracurrculars: 20 Tuition listed
Westside School
Westside School Photo
10404 34th Avenue SW
Seattle, WA 98146
(206) 932-2511
Gr: NS-8 | 397 students Avg. class size: 38 students Sports: 5 | Extracurrculars: 1 Tuition & acceptance rate listed
Willows Preparatory School
Willows Preparatory School Photo
(3)
12280 Woodinville Redmond Rd Ne
Redmond, WA 98052
(425) 380-5670
Gr: 5-12 | 306 students Sports: 8 | Extracurrculars: 15 Tuition listed
Woodinville Montessori School | Bothell Campus
Woodinville Montessori School | Bothell Campus Photo - Woodinville Montessori School aims to prepare students for life. It offers college prep academics, personalized learning, low student-to-teacher ratio, community development, leadership, environmental and global awareness, entrepreneurship, service learning, arts, technology, electives, clubs, orienteering and more, in a collaborative and supportive environment.
Montessori School
(1)
19102 North Creek Parkway
Bothell, WA 98011
(425) 482-3184
Gr: NS-12 | 459 students Avg. class size: 20 students Sports: 7 | Extracurrculars: 25 Tuition listed
Academy For Precision Learning
Academy For Precision Learning Photo - Welcome to APL, where we celebrate neurodiversity!
Alternative School
1432 15th Ave
Seattle, WA 98122
(206) 427-0115
Gr: K-12 | 67 students Avg. class size: 7 students Extracurrculars: 2 Tuition listed
Billings Middle School
Billings Middle School Photo - At Billings Middle School our Advisory Program supports students through the challenges of adolescence.
(13)
12351 8th Ave NE
Seattle, WA 98125
(206) 547-4614
Gr: 6-8 | 69 students Avg. class size: 15 students Sports: 11 | Extracurrculars: 1 Tuition listed
Bright Water Waldorf School
Bright Water Waldorf School Photo - Beginning in the early childhood classes, circle time and group songs connect the children with rhythm, melody, and pitch. Students rise into the early grades with flute and lyre playing. Formal subject classes for music instruction start in the fourth grade with Strings. In middle school students venture into more complex arrangements and play together in ensembles.
Special Program Emphasis
(3)
1414 South Weller Street
Seattle, WA 98144
(206) 624-6176
Gr: NS-8 | 119 students Avg. class size: 11 students Sports: 5 Tuition & acceptance rate listed
Explorer West Middle School
Explorer West Middle School Photo - Explorer West Snow Shoe Testing
10015 28th Ave SW
Seattle, WA 98146
(206) 935-0495
Gr: 6-8 | 109 students Avg. class size: 16 students Sports: 6 | Extracurrculars: 10 Tuition listed
Gig Harbor Academy
Gig Harbor Academy Photo
(8)
6820 32nd St NW
Gig Harbor, WA 98335
(253) 265-2150
Gr: NS-5 | 156 students Avg. class size: 14 students Tuition & acceptance rate listed
Show 12 more private schools in Washington (out of 47 total schools)
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