Willows Preparatory School Photo

Top 10 Best Washington Private High Schools Belonging to NWAIS (Northwest Association of Independent Schools) (2025)

For the 2025 school year, there are 15 private high schools belonging to NWAIS (Northwest Association of Independent Schools) serving 5,468 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private high schools belonging to NWAIS (Northwest Association of Independent Schools) in Washington include Charles Wright Academy, Annie Wright Schools, and Holy Names Academy.
The average tuition cost is $30,490, which is higher than the Washington private high school average tuition cost of $16,346.
27% of private high schools belonging to NWAIS (Northwest Association of Independent Schools) in Washington are religiously affiliated (most commonly Catholic and Episcopal).

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

School
Location
Grades
Students
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
Grades: NS-12
| 578 students
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
Grades: 6-12
| 836 students
UPrep
UPrep Photo
(9)
8000 25th Ave NE
Seattle, WA 98115
(206) 525-2714
Grades: 6-12
| 703 students
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.
(Episcopal)
(2)
827 N Tacoma Ave
Tacoma, WA 98403
(253) 272-2216
Grades: NS-12
| 838 students
Holy Names Academy
Holy Names Academy Photo
All-girls (Catholic)
(3)
728 21st Ave E
Seattle, WA 98112
(206) 323-4272
Grades: 9-12
| 575 students
The Northwest School
(10)
1415 Summit Ave
Seattle, WA 98122
(206) 816-6052
Grades: 6-12
| 446 students
Northwest Yeshiva High School
Northwest Yeshiva High School Photo
(Jewish)
(8)
5017 90th Avenue SE
Mercer Island, WA 98040
(206) 232-5272
Grades: 9-12
| 65 students
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
Grades: K-12
| 311 students
Willows Preparatory School
Willows Preparatory School Photo
(3)
12280 Woodinville Redmond Rd Ne
Redmond, WA 98052
(425) 380-5670
Grades: 5-12
| 276 students
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
Grades: NS-12
| 460 students
Academy For Precision Learning
Academy For Precision Learning Photo - Welcome to APL, where we celebrate neurodiversity!
Alternative School
5031 University Way Ne
Seattle, WA 98105
(206) 427-0115
Grades: K-12
| 67 students
Hyla Middle School
7861 Bucklin Hill Rd Ne
Bainbridge Island, WA 98110
(206) 842-5988
Grades: 6-11
| 129 students
Jefferson Community School
Jefferson Community School Photo - JCS in Nepal 2017
Special Program Emphasis
280 Quincy St Ste I
Port Townsend, WA 98368
(360) 385-0622
Grades: 7-12
| 16 students
Puget Sound Community School
Puget Sound Community School Photo
Alternative School
(2)
660 S Dearborn St
Seattle, WA 98134
(206) 324-4350
Grades: 6-12
| 34 students
Yellow Wood Academy
Yellow Wood Academy Photo - We are so proud of our YWA graduates!
Special Education School
9655 SE 36th Street,
Mercer Island, WA 98040
(206) 236-1095
Grades: K-12
| 134 students

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