For the 2025-26 school year, there are 21 private high schools belonging to National Association of Independent Schools (NAIS) serving 9,761 students in Washington. You can also find more schools membership associations in Washington.
The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in Washington include Annie Wright Schools, Holy Names Academy, and Charles Wright Academy.
The average tuition cost is $33,829, which is higher than the Washington private high school average tuition cost of $17,467.
Top Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in Washington (2025-26)
School
Location
Quick Facts
8905 208th Avenue NE
Redmond, WA 98053
(425) 898-1720
Redmond, WA 98053
(425) 898-1720
Gr: NS-12 | 948 students Avg. class size: 16 students Sports: 10 | Extracurrculars: 14 Tuition & acceptance rate listed
7723 Chambers Creek Rd W University Place
University Place, WA 98467
(253) 620-8373
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
22500 SE 64th PL, #150
Issaquah, WA 98027
(425) 427-1400
Issaquah, WA 98027
(425) 427-1400
Gr: 4-12 | 23 students Avg. class size: 1 student Tuition & acceptance rate listed
Dartmoor School![Dartmoor School Photo - Dartmoor School Seattle Campus]( "Dartmoor School Photo - Dartmoor School Seattle Campus")
Alternative School
6515 15th Ave NE
Seattle, WA 98115
(425) 885-6296
Seattle, WA 98115
(425) 885-6296
Gr: 1-12 | 37 students Avg. class size: 1 student Tuition & acceptance rate listed
Dartmoor School![Dartmoor School Photo - Dartmoor Bothell Campus]( "Dartmoor School Photo - Dartmoor Bothell Campus")
Alternative School
19515 North Creek Pkwy. #208
Bothell, WA 98011
(425) 885-6296
Bothell, WA 98011
(425) 885-6296
Gr: 1-12 | 29 students Avg. class size: 1 student Tuition & acceptance rate listed
232 228th Avenue SE
Sammamish, WA 98074
(425) 295-3000
Sammamish, WA 98074
(425) 295-3000
Gr: 6-12 | 836 students Avg. class size: 19 students Sports: 19 | Extracurrculars: 22 Tuition & acceptance rate listed
4800 139th Avenue SE
Bellevue, WA 98006
(425) 641-0700
Bellevue, WA 98006
(425) 641-0700
Gr: 5-12 | 225 students Avg. class size: 12 students Sports: 13 | Extracurrculars: 29 Tuition listed
8000 25th Ave NE
Seattle, WA 98115
(206) 525-2714
Seattle, WA 98115
(206) 525-2714
Gr: 6-12 | 746 students Avg. class size: 18 students Sports: 8 | Extracurrculars: 7 Tuition listed
827 N Tacoma Ave
Tacoma, WA 98403
(253) 272-2216
Tacoma, WA 98403
(253) 272-2216
Gr: NS-12 | 838 students Avg. class size: 17 students Sports: 9 | Extracurrculars: 27 Tuition listed
3400 E Harrison Street
Seattle, WA 98112
(206) 326-7736
Seattle, WA 98112
(206) 326-7736
Gr: K-12 | 735 students Avg. class size: 15 students Sports: 9 Tuition listed
10613 NE 38th Place
Kirkland, WA 98033
(425) 822-5668
Kirkland, WA 98033
(425) 822-5668
Gr: 5-12 | 538 students Avg. class size: 16 students Sports: 11 | Extracurrculars: 24 Tuition & acceptance rate listed
728 21st Ave E
Seattle, WA 98112
(206) 323-4272
Seattle, WA 98112
(206) 323-4272
Gr: 9-12 | 575 students Avg. class size: 21 students Sports: 17 Tuition & acceptance rate listed
3606 NE 78th St
Vancouver, WA 98665
(360) 574-1613
Vancouver, WA 98665
(360) 574-1613
Gr: NS-12 | 1,110 student Avg. class size: 20 students Sports: 11 | Extracurrculars: 13 Tuition & acceptance rate listed
The Northwest School
(10)
1415 Summit Ave
Seattle, WA 98122
(206) 816-6032
Seattle, WA 98122
(206) 816-6032
Gr: 6-12 | 446 students Avg. class size: 17 students Sports: 6 | Extracurrculars: 14 Tuition & acceptance rate listed
20301 NE 108th Street
Redmond, WA 98053
(425) 868-1000
Redmond, WA 98053
(425) 868-1000
Gr: 5-12 | 554 students Avg. class size: 14 students Sports: 9 | Extracurrculars: 16 Tuition & acceptance rate listed
2929 W Waikiki Road
Spokane, WA 99208
(509) 466-1636
Spokane, WA 99208
(509) 466-1636
Gr: K-12 | 311 students Avg. class size: 12 students Sports: 10 | Extracurrculars: 16 Tuition & acceptance rate listed
1201 E Union Street
Seattle, WA 98122
(206) 323-6600
Seattle, WA 98122
(206) 323-6600
Gr: 6-12 | 772 students Avg. class size: 18 students Sports: 13 | Extracurrculars: 25 Tuition & acceptance rate listed
12280 Woodinville Redmond Rd Ne
Redmond, WA 98052
(425) 380-5670
Redmond, WA 98052
(425) 380-5670
Gr: 5-12 | 306 students Sports: 8 | Extracurrculars: 15 Tuition listed
711 228th Ave Ne
Sammamish, WA 98074
(425) 836-1600
Sammamish, WA 98074
(425) 836-1600
Gr: 6-12 | 17 students Tuition listed
660 S Dearborn St
Seattle, WA 98134
(206) 324-4350
Seattle, WA 98134
(206) 324-4350
Gr: 6-12 | 34 students Avg. class size: 5 students Tuition & acceptance rate listed
505 Spring St
Friday Harbor, WA 98250
(360) 378-6393
Friday Harbor, WA 98250
(360) 378-6393
Gr: 6-12 | 103 students Avg. class size: 14 students Sports: 13 | Extracurrculars: 11 Tuition & acceptance rate listed
Recent Articles
Transferring from Public to Private School Mid-Year: What to Expect
Considering a mid-year transfer from public to private school? Learn what to expect with admissions, academic placement, social adjustment, and financial aid to ensure a smooth transition.
A Guide to Day vs. Boarding School: Which Is Right for Your Family
Discover the key differences between day and boarding schools to determine the best fit for your child. Explore benefits, costs, lifestyle factors, and questions to help guide your family’s decision.
The A to Z of Private Schools 2025
Explore the A to Z of private schools in 2025—from admissions to tuition—offering parents and educators clear insights into today’s options.
