[+] Show Closed Private Schools in King County, Washington

Overview

Academics and Faculty:

# Teachers

5,309 Teachers

10,039 Teachers

Average Student-Teacher Ratio

11:1

12:1

View Data

Student-Teacher Ratio Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	11:1	12:1	11:1
2024	11:1	12:1	11:1
2023	11:1	12:1	11:1
2022	11:1	12:1	11:1
2021	11:1	12:1	11:1
2020	11:1	12:1	12:1
2019	11:1	12:1	12:1
2018	11:1	12:1	12:1
2017	11:1	12:1	12:1
2016	11:1	12:1	12:1
2015	12:1	12:1	12:1

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% Average Faculty w/Advanced Degree

63%

59%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	62%	58%	55%
2024	61%	57%	54%
2023	62%	58%	54%
2022	60%	57%	54%
2021	61%	57%	54%
2020	60%	57%	54%
2019	59%	56%	53%
2018	58%	55%	53%
2017	58%	55%	53%
2016	55%	54%	52%
2015	55%	55%	52%

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Average Class Size

15 students

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Class Size Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	15	16	15
2024	15	16	15
2023	15	16	15
2022	15	15	15
2021	15	15	15
2020	15	15	15
2019	15	15	15
2018	15	15	15
2017	15	15	15
2016	15	15	15
2015	15	15	15

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Average Number of AP Courses

11 courses

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Trends in Average Number of AP Courses Offered
Year	King County Average	Washington (WA) Average	National Average
2025	10	10	13
2024	10	8	12
2023	10	9	11
2022	10	8	11
2021	10	8	11
2020	10	8	11
2019	10	8	11
2018	10	8	11
2017	10	8	10
2016	9	7	10
2015	9	7	10

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Average SAT score

1297

(Out of 1600)

1273

View Data

SAT Score Trends (2017-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	1285	1264	1233
2024	1280	1257	1230
2023	1246	1228	1228
2022	1254	1235	1229
2021	1262	1242	1229
2020	1246	1233	1226
2019	1277	1247	1226
2018	1277	1241	1226
2017	1323	1255	1233

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Average ACT score

(Out of 36)

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ACT Score Trends (2017-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	30	29	26
2024	30	28	26
2023	30	27	26
2022	30	28	26
2021	30	28	26
2020	30	28	25
2019	29	27	25
2018	29	27	25
2017	29	27	25

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Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$20,931

$15,804

View Data

Tuition Cost Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	$20,512	$15,533	$15,012
2024	$20,374	$14,062	$13,254
2023	$19,323	$13,102	$12,626
2022	$17,709	$12,138	$12,187
2021	$17,075	$11,838	$11,800
2020	$15,850	$11,300	$11,512
2019	$15,585	$10,936	$11,293
2018	$15,126	$10,668	$11,017
2017	$13,942	$10,030	$10,708
2016	$12,940	$9,472	$10,356
2015	$12,735	$9,211	$9,939

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Average Summer Program Cost

$1,063

$839

View Data

Summer Program Cost Trends (2018-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	$1,060	$810	$1,152
2024	$1,050	$702	$1,128
2023	$2,085	$1,305	$1,156
2022	$890	$757	$1,102
2021	$882	$728	$1,125
2020	$877	$774	$1,217
2019	$932	$788	$1,305
2018	$579	$490	$1,108

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Average % on Financial Aid

26%

28%

View Data

Percent on Financial Aid Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	26%	29%	34%
2024	25%	28%	34%
2023	25%	27%	34%
2022	24%	27%	33%
2021	24%	26%	33%
2020	25%	27%	32%
2019	26%	27%	31%
2018	25%	26%	30%
2017	24%	25%	30%
2016	23%	23%	29%
2015	23%	23%	28%

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Average Financial Aid Grant

$13,817

$8,970

View Data

Financial Aid Grant Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	$13,988	$8,921	$7,073
2024	$13,902	$8,821	$6,930
2023	$10,667	$6,927	$6,469
2022	$9,876	$6,141	$6,289
2021	$9,418	$6,073	$6,055
2020	$8,332	$5,578	$5,921
2019	$8,373	$5,841	$5,795
2018	$7,287	$5,265	$5,456
2017	$6,912	$5,049	$5,319
2016	$7,033	$5,147	$5,105
2015	$6,748	$4,878	$5,030

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Average Acceptance Rate

77%

82%

View Data

Acceptance Rate Trends (2015-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	77%	82%	81%
2024	79%	85%	85%
2023	77%	85%	85%
2022	77%	85%	85%
2021	78%	85%	85%
2020	78%	85%	85%
2019	77%	84%	85%
2018	76%	84%	85%
2017	77%	84%	85%
2016	73%	82%	85%
2015	73%	81%	85%

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Average Endowment Size

$21.67 million

$25.16 million

View Data

Endowment Trends (2020-2025)
Year	King County Average	Washington (WA) Average	National Average
2025	$39 M	$25 M	$39 M
2024	$9 M	$8 M	$39 M
2023	$8 M	$6 M	$39 M
2022	$10 M	$7 M	$40 M
2021	$11 M	$7 M	$40 M
2020	$11 M	$7 M	$40 M

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Students by Ethnicity:

0.67

0.64

View Data

Diversity Score Trends
Year	King County Average	Washington (WA) Average	National Average
2025	0.67	0.64	0.65
2024	0.67	0.64	0.65
2023	0.66	0.64	0.65
2022	0.64	0.62	0.64
2021	0.64	0.63	0.64
2020	0.65	0.63	0.64
2019	0.63	0.61	0.63
2018	0.64	0.62	0.63
2017	0.62	0.61	0.61
2016	0.62	0.60	0.61
2015	0.62	0.60	0.61

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# American Indian Students

326 Students

1,228 Students

% American Indian Students

View Data

Percentage of Private School Students of American Indian Trends
Year	King County Average	Washington (WA) Average	National Average
2025	1%	1%	1%
2024	1%	1%	1%
2023	1%	1%	1%
2022	1%	1%	2%
2021	1%	1%	1%
2020	1%	2%	1%
2019	2%	2%	1%
2018	3%	2%	2%
2017	3%	2%	1%
2016	3%	2%	1%
2015	3%	2%	1%

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# Asian Students

6,505 Students

9,040 Students

% Asian Students

12%

View Data

Asian Student Percentage Trends
Year	King County Average	Washington (WA) Average	National Average
2025	12%	8%	5%
2024	11%	8%	5%
2023	11%	8%	5%
2022	10%	7%	4%
2021	10%	7%	4%
2020	10%	7%	4%
2019	8%	6%	4%
2018	8%	6%	4%
2017	7%	6%	4%
2016	8%	6%	4%
2015	8%	6%	4%

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# Hispanic Students

2,427 Students

6,307 Students

% Hispanic Students

View Data

Hispanic Student Percentage Trends
Year	King County Average	Washington (WA) Average	National Average
2025	4%	5%	9%
2024	4%	5%	9%
2023	4%	5%	9%
2022	4%	5%	8%
2021	4%	5%	9%
2020	4%	5%	9%
2019	3%	5%	8%
2018	3%	5%	8%
2017	3%	5%	8%
2016	3%	5%	8%
2015	3%	5%	8%

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# Black Students

2,486 Students

3,815 Students

% Black Students

View Data

Black Student Percentage Trends
Year	King County Average	Washington (WA) Average	National Average
2025	4%	3%	7%
2024	4%	3%	7%
2023	4%	3%	8%
2022	4%	3%	7%
2021	4%	3%	7%
2020	5%	3%	8%
2019	4%	3%	7%
2018	5%	3%	7%
2017	4%	3%	7%
2016	4%	3%	7%
2015	4%	3%	8%

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# White Students

27,109 Students

59,141 Students

% White Students

48%

50%

View Data

White Student Percentage Trends
Year	King County Average	Washington (WA) Average	National Average
2025	48%	50%	52%
2024	48%	50%	52%
2023	50%	51%	52%
2022	52%	53%	54%
2021	51%	53%	54%
2020	51%	53%	54%
2019	53%	55%	56%
2018	52%	55%	56%
2017	54%	56%	58%
2016	54%	56%	58%
2015	55%	57%	58%

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# Hawaiian Students

369 Students

651 Students

% Hawaiian Students

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

16,740 Students

38,328 Students

% of Others Students

30%

32%

View Data

Other Races Student Percentage Trends
Year	King County Average	Washington (WA) Average	National Average
2025	30%	32%	26%
2024	31%	32%	26%
2023	29%	31%	25%
2022	29%	30%	25%
2021	30%	30%	25%
2020	29%	29%	24%
2019	30%	29%	24%
2018	29%	29%	23%
2017	29%	28%	22%
2016	28%	28%	22%
2015	27%	27%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

8 extracurriculars

Average Number of Sports

6 sports

Frequently Asked Questions

What are the top ranked private schools in King County, WA?

The private schools in King County, WA include Bellevue Christian School – Clyde Hill Campus, Auburn Adventist Academy, and BASIS Independent School of Bellevue.

How many private schools are located in King County?

328 private schools are located in King County.

How much do private schools cost in King County?

The average tuition cost is $20,931, which is higher than the Washington private school average tuition cost of $15,804.

How diverse are private schools in King County?

King County private schools are approximately 37% minority students, which is higher than the Washington private school average of 32%.

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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Year	King County Average	Washington (WA) Average	National Average
2025	194	172	179
2024	194	170	172
2023	187	163	174
2022	190	157	185
2021	187	157	180
2020	179	151	171
2019	186	152	175
2018	187	150	172
2017	192	151	180
2016	186	148	178
2015	185	144	167

Quick Facts (2026-27)

Quick Facts (2026-27)

Top Ranked King County Private Schools (2026-27)

King County Private Schools (Closed)

Overview

Trends in Total Number of Private Schools

Trends in the Average Number of Students Per Private School

Percentage of Students of Color Trends (2015-2025)

Academics and Faculty:

Student-Teacher Ratio Trends (2015-2025)

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

Class Size Trends (2015-2025)

Trends in Average Number of AP Courses Offered

SAT Score Trends (2017-2025)

ACT Score Trends (2017-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2018-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Endowment Trends (2020-2025)

Students by Ethnicity:

Diversity Score Trends

Percentage of Private School Students of American Indian Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

Extracurriculars and Sports:

Frequently Asked Questions

Recent Articles

Filter Schools

Quick Links

Most Popular Articles

More Articles

Best King County Private Schools (2026-27)

Top Ranked King County Private Schools (2026-27)

King County Private Schools (Closed)

Overview

Trends in Total Number of Private Schools

Trends in the Average Number of Students Per Private School

Percentage of Students of Color Trends (2015-2025)

Academics and Faculty:

Student-Teacher Ratio Trends (2015-2025)

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

Class Size Trends (2015-2025)

Trends in Average Number of AP Courses Offered

SAT Score Trends (2017-2025)

ACT Score Trends (2017-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2018-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Endowment Trends (2020-2025)

Students by Ethnicity:

Diversity Score Trends

Percentage of Private School Students of American Indian Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

Extracurriculars and Sports:

Frequently Asked Questions

More Articles