Dartmoor School Photo - Dartmoor School

Best King County Private Schools (2026)

For the 2026 school year, there are 326 private schools serving 56,737 students in King County, WA (there are 537 public schools, serving 279,738 public students). 17% of all K-12 students in King County, WA are educated in private schools (compared to the WA state average of 10%).
The top-ranked private schools in King County, WA include Auburn Adventist Academy, Bertschi School, and St. Thomas School.
The average tuition cost is $20,535, which is higher than the Washington private school average tuition cost of $15,524.
35% of private schools in King County, WA are religiously affiliated (most commonly Catholic and Christian).

Top-Ranked King County Private Schools (2026)

School
Location
Quick Facts
15749 NE 4th Street
Bellevue, WA 98008
(425) 689-3376
Gr: K-12 | 363 students Avg. class size: 20 students Sports: 6 | Extracurrculars: 27 Tuition & acceptance rate listed
The Bear Creek School
The Bear Creek School Photo - The Bear Creek School was founded in 1988.
(Christian)
(12)
8905 208th Avenue NE
Redmond, WA 98053
(425) 898-1720
Gr: NS-12 | 948 students Avg. class size: 16 students Sports: 10 | Extracurrculars: 14 Tuition & acceptance rate listed
1701 98th Ave Ne
Bellevue, WA 98004
(425) 460-3300
Gr: 7-12 | 1,037 student Avg. class size: 17 students Sports: 8 Tuition & acceptance rate listed
7800 Ne 28th St
Medina, WA 98039
(425) 454-4402
Gr: K-6 | 240 students Tuition listed
Chestnut Hill Academy
Chestnut Hill Academy Photo
(6)
13633 SE 26th St
Bellevue, WA 98005
(425) 372-2800
Gr: K-5 | 377 students Avg. class size: 16 students Sports: 2 | Extracurrculars: 14 Tuition & acceptance rate listed
Discovery Montessori School
Discovery Montessori School Photo - Our playground supports outdoor learning and activity year round.
Montessori School
(1)
2836 34th Ave West
Seattle, WA 98199
(206) 282-3848
Gr: NS-K | 40 students Avg. class size: 20 students Sports: 1 | Extracurrculars: 3 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
Eastside Christian School
Eastside Christian School Photo - Join Us for our Open House for Elementary Grades, K-5, Thursday, November 6th at 9:15am.
(Christian)
(12)
14615 SE 22nd Street
Bellevue, WA 98007
(425) 641-5570
Gr: PK-8 | 281 students Avg. class size: 16 students Sports: 6 | Extracurrculars: 2 Tuition & acceptance rate listed
Epiphany School
Epiphany School Photo - Epiphany School is an independent, non-parochial school serving students in Pre-K through 5th Grade.
(8)
3611 E Denny Way
Seattle, WA 98122
(206) 323-9011
Gr: PK-5 | 265 students Sports: 1 | Extracurrculars: 14 Tuition listed
214 E. Galer Street, Suite 200
Seattle, WA 98102
(206) 486-3614
Gr: 5-12 Sports: 1 | Extracurrculars: 6 Tuition 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
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
St. Thomas School
St. Thomas School Photo
(7)
8300 NE 12th Street
Medina, WA 98039
(425) 454-5880
Gr: PK-8 | 368 students Avg. class size: 18 students Sports: 6 | Extracurrculars: 9 Tuition & acceptance rate listed
1951 152nd Pl NE Suite 101
Bellevue, WA 98007
(425) 640-9000
Gr: 7-12 Sports: 5 | Extracurrculars: 4 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
18250 168th Pl Ne
Woodinville, WA 98072
(425) 454-4402
Gr: K-6 | 225 students Tuition & acceptance rate listed
Brightmont Academy - Sammamish
Brightmont Academy - Sammamish Photo - Taking individual courses at Brightmont Academy offers an effective one-to-one instruction alternative for students to learn concepts and skills by progressing at their own pace.
Special Program Emphasis
4588 Klahanie Dr SE Suite 401
Issaquah, WA 98029
(425) 836-1600
Gr: 1-12 Avg. class size: 1 student Tuition listed
Dartmoor School
Dartmoor School Photo - One-to-One instruction helps students excel
Alternative School
(1)
2800 Northup Way, Suite 120
Bellevue, WA 98004
(425) 885-6296
Gr: 1-12 | 43 students Avg. class size: 1 student Tuition & acceptance rate listed
Dartmoor School
Dartmoor School Photo - One-to-One lnstruction
Alternative School
(1)
22500 SE 64th PL, #150
Bellevue, WA 98027
(425) 885-6296
Gr: 1-12 | 23 students Avg. class size: 1 student Tuition & acceptance rate listed
Dartmoor School
Dartmoor School Photo - Dartmoor School Seattle Campus
Alternative School
6515 15th Ave NE
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 - 1:1 Instruction
Alternative School
19515 North Creek Pkwy. #208
Bothell, WA 98011
(425) 885-6296
Gr: 1-12 | 29 students Avg. class size: 1 student Tuition & acceptance rate listed
Emerald Heights Academy
Emerald Heights Academy Photo - All School Picture
(Catholic)
(6)
5130 164th Ave SE
Bellevue, WA 98006
(425) 643-1671
Gr: PK-8 | 47 students Avg. class size: 10 students Extracurrculars: 3 Tuition & acceptance rate listed
Evergreen Academy
Evergreen Academy Photo
(5)
16017 118th Place NE
Bothell, WA 98011
(425) 600-3048
Gr: NS-5 | 175 students Extracurrculars: 7 Tuition listed
Seattle Waldorf School
Seattle Waldorf School Photo
Special Program Emphasis
(11)
2728 NE 100th Street
Seattle, WA 98125
(206) 524-5320
Gr: NS-8 | 184 students Avg. class size: 22 students Sports: 4 | Extracurrculars: 9 Tuition & acceptance rate listed
Academy Northwest Offices
Academy Northwest Offices Photo - Academy Northwest is an affordable private Christian school with full time programs, as well as home education extension programs for grades k - 12.
Alternative School (Christian)
(1)
514 State Ave. Ste. 109 Marysville, WA 98270
Marysville, WA 98270
(206) 246-9227
Gr: K-12 | 298 students Avg. class size: 10 students Extracurrculars: 2 Tuition & acceptance rate listed
Academy Schools
Academy Schools Photo - Lower School
Special Education School
(4)
14601 Interurban Ave S
Seattle, WA 98168
(206) 588-0860
Gr: PK-12 | 48 students Avg. class size: 7 students Extracurrculars: 7 Tuition & acceptance rate listed
All-Star Academy
All-Star Academy Photo - We serve PreK-8th families that are looking for their bored or mismanaged student to receive a high-quality, enjoyable education.
Alternative School
30355 SE High Point Way
Issaquah, WA 98027
(425) 526-4600
Gr: PK-8 Avg. class size: 8 students Extracurrculars: 1 Tuition & acceptance rate listed
Assumption-St. Bridget School
Assumption-St. Bridget School Photo
(Catholic)
6220 32nd Ave NE
Seattle, WA 98115
(206) 524-7452
Gr: PK-8 | 561 students Avg. class size: 30 students Tuition listed
Auburn Adventist Academy
Auburn Adventist Academy Photo
(Seventh Day Adventist)
(3)
5000 Auburn Way S
Auburn, WA 98092
(253) 939-5000
Gr: 9-12 | 239 students Avg. class size: 25 students Sports: 12 | Extracurrculars: 10 Tuition & acceptance rate listed
14640 Ne 24th St
Bellevue, WA 98007
(425) 649-0791
Gr: PK-4 | 658 students Avg. class size: 12 students Extracurrculars: 11 Tuition listed
Bellevue Montessori School
Bellevue Montessori School Photo - Community building takes place in the classroom.
Montessori School
2411 112th Avenue NE
Bellevue, WA 98004
(425) 454-7439
Gr: PK-5 | 274 students Avg. class size: 20 students Extracurrculars: 5 Tuition & acceptance rate listed
Bertschi School
Bertschi School Photo
2227 10th Avenue E
Seattle, WA 98102
(206) 442-6856
Gr: PK-5 | 246 students Avg. class size: 18 students Sports: 3 Tuition & acceptance rate listed
Bishop Blanchet High School
Bishop Blanchet High School Photo
(Catholic)
8200 Wallingford Ave N
Seattle, WA 98103
(206) 527-7711
Gr: 9-12 | 855 students Avg. class size: 22 students Sports: 16 | Extracurrculars: 20 Tuition & acceptance rate listed
Buena Vista SDA School
(Seventh Day Adventist)
3320 Academy Drive SE
Auburn, WA 98092
(253) 833-0718
Gr: PK-8 | 227 students Avg. class size: 22 students Sports: 3 | Extracurrculars: 3 Tuition & acceptance rate listed
The Bush School
The Bush School Photo
(1)
3400 E Harrison Street
Seattle, WA 98112
(206) 326-7736
Gr: K-12 | 735 students Avg. class size: 15 students Sports: 9 Tuition listed
Show 100 more private schools in King County, WA (out of 326 total schools)
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[+] Show Closed Private Schools in King County, Washington

King County Private Schools (Closed)

School
Location
Quick Facts
7834 Se 32nd St
Mercer Island, WA 98040
(206) 230-5672
Gr: 1-12 | 25 students
23855 SE 216th St
Maple Valley, WA 98038
(425) 276-5649
Gr: PK-5 | 68 students
Brightmont Academy (Closed 2020)
Special Program Emphasis
13300 NE 175th Street, #1
Woodinville, WA 98072
(425) 219-4993
Gr: 6-12 Avg. class size: 1 student Tuition listed
Burien SDA School (Closed 2006)
(Seventh Day Adventist)
14237 Des Moines Way S
Seattle, WA 98168
(206) 246-8433
Gr: K-8 | 23 students
Calvary Lutheran Preschool & Kindergarten (Closed 2024)
Daycare / Preschool (Wisconsin Evangelical Lutheran Synod)
16231 Ne 6th Street
Bellevue, WA 98008
(425) 747-5410
Gr: PK-K | 11 students Avg. class size: 15 students Tuition listed
Eastridge Christian School (Closed 2015)
Daycare / Preschool (Assembly of God)
24205 Se Issaquah Fall City Rd
Issaquah, WA 98029
(425) 270-6329
Gr: PK-K | 159 students
Emerald City School (Closed 2021)
Special Education School
520 Denny Way
Seattle, WA 98109
(206) 209-0950
Gr: 4-8 | 11 students Avg. class size: 3 students Acceptance rate listed
13303 Se 288th Street
Auburn, WA 98092
(253) 631-3796
Gr: NS | 131 students
19303 Fremont Avenue North
Seattle, WA 98133
(206) 546-7214
Gr: 5-12 | 652 students
2001 15th Ave Ne
Issaquah, WA 98029
(425) 394-1000
Gr: PK-K | 86 students
9202 21st Avenue Sw
Seattle, WA 98106
(206) 762-3199
Gr: PK-K | 12 students
3613 S Juneau St
Seattle, WA 98118
Gr: NS-8 | 140 students
2000 Ne Perkins Way
Seattle, WA 98155
(206) 365-2720
Gr: PK-6 | 131 students
8460 160th Ave Ne
Redmond, WA 98052
(425) 867-0622
Gr: PK-1 | 134 students
14434 Ne 8th St
Bellevue, WA 98007
(425) 867-0622
Gr: PK-K | 120 students
14550 Westminster Way N
Seattle, WA 98133
(425) 672-6805
Gr: 3-12 | 25 students Avg. class size: 6 students
1122 East John St
Seattle, WA 98102
(206) 322-4329
Gr: 5-8
2332 N 116th St
Seattle, WA 98133
(206) 291-5526
Gr: PK-3 | 16 students
4141 41st Ave Sw
Seattle, WA 98116
(206) 246-9751
Gr: 9-12 | 20 students Avg. class size: 8 students Tuition & acceptance rate listed
18435 42nd Ave S
Seattle, WA 98188
(206) 243-8636
Gr: PK-6 | 43 students
Seattle Lutheran High School (Closed 2024)
(Lutheran Church Missouri Synod)
4100 SW Genesee Street
Seattle, WA 98116
(206) 937-7722
Gr: 9-12 | 69 students Avg. class size: 16 students Tuition listed
Seattle Urban Academy (Closed 2020)
Alternative School (Christian)
10056 Renton Ave S
Seattle, WA 98178
(206) 723-0333
Gr: 9-12 | 22 students Avg. class size: 10 students Tuition & acceptance rate listed
777 62nd Ave Ne
Seattle, WA 98115
(360) 746-9575
Gr: 9-12 | 75 students
Po Box 939
Fall City, WA 98024
(425) 222-5194
Gr: PK-7 | 20 students
4401 42nd Avenue Sw
Seattle, WA 98116
(206) 938-1414
Gr: PK-8 | 145 students

Overview

This County (King County)
This State (WA)
# Schools
338 Schools

Student Body:

# Students
56,737 Students
120,562 Students
% Average Students of Color
36%
31%

Academics and Faculty:

# Teachers
5,192 Teachers
9,955 Teachers
Average Student-Teacher Ratio
11:1
12:1
% Average Faculty w/Advanced Degree
62%
58%
Average Class Size
15 students
16 students
Average Number of AP Courses
10 courses
10 courses
Average SAT score
1285
(Out of 1600)
1260
Average ACT score
30
(Out of 36)
29

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$20,535
$15,524
Average Summer Program Cost
$1,032
$802
Average % on Financial Aid
26%
29%
Average Financial Aid Grant
$13,988
$8,921
Average Acceptance Rate
77%
82%
Average Endowment Size
$39.99 million
$41.61 million

Students by Ethnicity:

0.67
0.64
# American Indian Students
326 Students
1,235 Students
% American Indian Students
1%
1%
# Asian Students
6,505 Students
9,056 Students
% Asian Students
12%
8%
# Hispanic Students
2,427 Students
6,317 Students
% Hispanic Students
4%
5%
# Black Students
2,486 Students
3,831 Students
% Black Students
4%
3%
# White Students
27,109 Students
59,335 Students
% White Students
48%
50%
# Hawaiian Students
369 Students
658 Students
% Hawaiian Students
1%
1%
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
16,763 Students
38,618 Students
% of Others Students
30%
32%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
8 extracurriculars
7 extracurriculars
Average Number of Sports
6 sports
6 sports

Frequently Asked Questions

What are the top-ranked private schools in King County, WA?
The top-ranked private schools in King County, WA include Auburn Adventist Academy, Bertschi School, and St. Thomas School.
How many private schools are located in King County?
326 private schools are located in King County.
How much do private schools cost in King County?
The average tuition cost is $20,535, which is higher than the Washington private school average tuition cost of $15,524.
How diverse are private schools in King County?
King County private schools are approximately 36% minority students, which is higher than the Washington private school average of 31%.
What percentage of students in King County go to private school?
17% of all K-12 students in King County are educated in private schools (compared to the WA state average of 10%).
What percentage of private schools are religiously affiliated in King County?
35% of private schools in King County are religiously affiliated (most commonly Catholic and Christian).
Which private schools in King County are often viewed compared to one another?

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