Private School Review - Established 2003
Dartmoor School
Dartmoor School
Fusion Academy Seattle Top 10 ยท Most AP Courses (WA)

Best Washington Private Schools Belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) (2026-27)

For the 2026-27 school year, there are 61 private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) serving 17,819 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington include All Saints Elementary School, Bethlehem Lutheran School, and BASIS Independent Bothell.
The average tuition cost is $19,847, which is higher than the Washington private school average tuition cost of $15,804.
52% of private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington are religiously affiliated (most commonly Christian and Catholic).

Quick Facts (2026-27)

  • # Private Schools: 61

Quick Facts (2026-27)

  • # Private Schools: 61

Top Ranked Private Schools Belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington (2026-27)

BASIS Independent Bothell Photo
BASIS Independent Bothell
Gr: PK-12 | 228 students
Sports: 3 | Extracurriculars: 23
21540 30th Drive SE
Bothell, WA 98021
(425) 484-1579
View Profile
Brightmont Academy - Sammamish Photo
Brightmont Academy - Sammamish
Gr: 1-12
Avg. class size: 1 student
Specialized Curriculum
4588 Klahanie Dr SE Suite 401
Issaquah, WA 98029
(425) 836-1600
View Profile
Brighton School Photo
Brighton School
Gr: PK-8 | 327 students
Avg. class size: 18 students
Sports: 6 | Extracurriculars: 2
21705 58th Avenue West
Mountlake Terrace, WA 98043
(425) 584-2361
(2)
View Profile
Fusion Academy Seattle Photo
Fusion Academy Seattle
Gr: 5-12
Sports: 1 | Extracurriculars: 6
214 E. Galer Street, Suite 200
Seattle, WA 98102
(206) 486-3614
View Profile
Northshore Christian Academy Photo
Northshore Christian Academy
Gr: NS-8 | 1,131 students
Avg. class size: 21 students
Sports: 6 | Extracurriculars: 17
Christian
5700 23rd Drive West
Everett, WA 98203
(425) 407-1119
(6)
View Profile
Bel-Red Bilingual Academy Photo
Bel-Red Bilingual Academy
Gr: PK-3 | 107 students
Avg. class size: 12 students
15061 Bel Red Rd
Bellevue, WA 98007
(425) 283-0717
View Profile
Dartmoor School Photo
Dartmoor School
Gr: 1-12 | 29 students
Avg. class size: 1 student
Alternative School
19515 North Creek Pkwy. #208
Bothell, WA 98011
(425) 885-6296
View Profile
Dartmoor School Photo
Dartmoor School
Gr: 1-12 | 43 students
Avg. class size: 1 student
Alternative School
2800 Northup Way, Suite 120
Bellevue, WA 98004
(425) 885-6296
(1)
View Profile
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)
View Profile
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
View Profile
Evergreen Academy Photo
Evergreen Academy
Gr: NS-5 | 175 students
Extracurriculars: 7
16017 118th Place NE
Bothell, WA 98011
(425) 600-3048
(5)
View Profile
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)
View Profile
West Sound Academy Photo
West Sound Academy
Gr: 6-12 | 94 students
Avg. class size: 16 students
Extracurriculars: 12
16571 Creative Drive NE
Poulsbo, WA 98370
(360) 598-5954
(12)
View Profile
Map of All Saints Elementary School
All Saints Elementary School
Gr: PK-8 | 343 students
Avg. class size: 22 students
Sports: 4 | Extracurriculars: 5
Catholic
504 2nd Street Sw
Puyallup, WA 98371
(253) 845-5025
View Profile
All-Star Academy Photo
All-Star Academy
Gr: PK-12
Avg. class size: 8 students
Extracurriculars: 1
Alternative School
30355 SE High Point Way
Issaquah, WA 98027
(425) 526-4600
View Profile
Auburn Adventist Academy Photo
Auburn Adventist Academy
Gr: 9-12 | 239 students
Avg. class size: 25 students
Sports: 12 | Extracurriculars: 10
Seventh Day Adventist
5000 Auburn Way S
Auburn, WA 98092
(253) 939-5000
(3)
View Profile
Map of Bethlehem Lutheran School
Bethlehem Lutheran School
Gr: PK-8 | 286 students
Avg. class size: 24 students
Sports: 8
Lutheran Church Missouri Synod
2505 W. 27th Ave.
Kennewick, WA 99337
(509) 582-5624
View Profile
Brightmont Academy - Redmond Photo
Brightmont Academy - Redmond
Gr: 1-12
Avg. class size: 1 student
Extracurriculars: 1
Alternative School
7345 164th Ave NE, Ste I-135
Redmond, WA 98052
(425) 373-0800
View Profile
Brightmont Academy - Seattle Photo
Brightmont Academy - Seattle
Gr: 1-12
Avg. class size: 1 student
Extracurriculars: 8
115 NE 100th St #200
Seattle, WA 98125
(206) 284-2300
View Profile
Concordia Christian Academy Photo
Concordia Christian Academy
Gr: K-12 | 217 students
Avg. class size: 18 students
Sports: 7 | Extracurriculars: 11
Lutheran Church Missouri Synod
202 E 56th Street
Tacoma, WA 98404
(253) 475-9513
(5)
View Profile
Show 26 more private schools in Washington (out of 61 total schools)
Loading...

Frequently Asked Questions

What are the top ranked private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington?
The top ranked private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington include All Saints Elementary School, Bethlehem Lutheran School, and BASIS Independent Bothell.
How many private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are located in Washington?
61 private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are located in Washington.
How much do private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) cost in Washington?
The average tuition cost is $19,847, which is higher than the Washington private school average tuition cost of $15,804.
How diverse are private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington?
Washington private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are approximately 35% minority students, which is higher than the Washington private school average of 32%.
What percentage of private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) are religiously affiliated in Washington?
52% of private schools belonging to Cognia (formerly AdvancED / SACS CASI / NCA CASI) (Cognia) in Washington are religiously affiliated (most commonly Christian and Catholic).
62
Private Schools
17,819
Students
$19,847
Avg. Tuition
35%
Students of Color
13:1
Student-Teacher Ratio

Recent Articles

How Much Homework Is Too Much?
How Much Homework Is Too Much?
Learn how to compare private school homework expectations, recognize excessive workloads, evaluate assignment quality, and ask better questions about academic balance before choosing a school for your child.
Learning Support Without a Formal Program
Learning Support Without a Formal Program
Learn what private schools mean by informal learning support, how services differ from formal programs, and which questions families should ask before choosing the right school today.
Beyond AP vs. IB: How to Judge Academic Rigor
Beyond AP vs. IB: How to Judge Academic Rigor
Learn how to judge academic rigor at private schools without AP or IB by examining curriculum depth, assessments, faculty expectations, advanced coursework, student work, and college preparation outcomes.

Quick Links

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

Most Popular Articles

School Rankings by Category
School Rankings by Category
 What's In A Grade?
What's In A Grade?
Athletics Are Not Optional
Athletics Are Not Optional

More Articles

Global Educator Empowerment
Well-Rounded Achievements
Programs for Exceptional Learners
Expert School Views
Strategic School Choices