Private School Review - Established 2003
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.
Woodinville Montessori School | Bothell Campus

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

For the 2025-26 school year, there are 14 private high schools belonging to NWAIS (Northwest Association of Independent Schools) serving 5,506 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, Saint George's School, and Eastside Catholic School.
The average tuition cost is $31,358, which is higher than the Washington private high school average tuition cost of $17,353.
21% of private high schools belonging to NWAIS (Northwest Association of Independent Schools) in Washington are religiously affiliated (most commonly Catholic and Jewish).

Top Ranked Private High 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 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
UPrep
UPrep Photo
(10)
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
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
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
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
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
Willows Preparatory School
Willows Preparatory School Photo
(4)
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
Hyla Middle School
7861 Bucklin Hill Rd Ne
Bainbridge Island, WA 98110
(206) 842-5988
Gr: 6-11 | 129 students Avg. class size: 15 students Sports: 4 Tuition listed
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
Gr: 7-12 | 16 students Avg. class size: 10 students Tuition & acceptance rate listed
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
Gr: K-12 | 134 students Avg. class size: 1 student Tuition & acceptance rate listed

Recent Articles

Understanding Private School Tuition in 2025
Understanding Private School Tuition in 2025
Explore updated private school tuition trends, costs, policy shifts, and financial planning insights for 2025 families considering private education.
Private School Curriculum in 2025: Key Courses and Trends
Private School Curriculum in 2025: Key Courses and Trends
Explore what private schools are teaching in 2025, from core subjects and AI to global studies and tuition trends shaping private education today.
Sliding-Scale & Income-Based Tuition Models for Private Schools
Sliding-Scale & Income-Based Tuition Models for Private Schools
Learn how sliding-scale and income-based tuition models work and whether they are right for your family. Compare costs, eligibility, and school options.

Quick Links

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

Most Popular Articles

What Private School Alumni Say a Decade Later
What Private School Alumni Say a Decade Later
 Washington Private Schools By Tuition Cost
Washington Private Schools By Tuition Cost
A Parent’s Guide to Private School Entrance Exams
A Parent’s Guide to Private School Entrance Exams
 Transferring from Public to Private School Mid-Year: What to Expect
Transferring from Public to Private School Mid-Year: What to Expect
 5 Facts About Reggio Emilia
5 Facts About Reggio Emilia

More Articles

Programs for Exceptional Learners
Premier School Models
Strategic School Choices
Funding the Future
Excellence in School Security