Top Ranked Mercer Island Private Schools (2026)

French American School of Puget Sound

Gr: PK-8 | 473 students

Avg. class size: 18 students

Sports: 5

Specialized Curriculum

3795 East Mercer Way

Mercer Island, WA 98040

(206) 275-3533

(8)

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Northwest Yeshiva High School

Gr: 9-12 | 65 students

Avg. class size: 12 students

Sports: 5 | Extracurriculars: 11

Jewish

5017 90th Avenue SE

Mercer Island, WA 98040

(206) 232-5272

(8)

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St. Monica Catholic School

Gr: NS-12 | 262 students

Avg. class size: 21 students

Sports: 4 | Extracurriculars: 17

Catholic

4320 87th Avenue SE

Mercer Island, WA 98040

(206) 232-5432

(6)

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Creative Learning Center Llc

Gr: PK-K | 59 students

Montessori School

2760 73rd Ave Se

Mercer Island, WA 98040

(206) 232-8900

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Early World Montessori

Gr: PK-K | 73 students

Montessori School

3027 80th Ave Se

Mercer Island, WA 98040

(206) 232-2400

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Privett Academy

Gr: 9-12 | 7 students

9311 SE 36th St

Mercer Island, WA 98040

(206) 232-0059

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[+] Show Closed Private Schools in Mercer Island, Washington

Mercer Island, Washington Private Schools (Closed)

American Academy

Gr: 1-12 | 25 students

Christian

7834 Se 32nd St

Mercer Island, WA 98040

(206) 230-5672

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Mercer Island, WA Private School Trends (10-Year)

Private Schools

-25.0% (-2 schools) 10-yr

939

Students

-25.8% (-326 students) 10-yr

$27,725

Avg. Tuition

+62.6% (+$10,675) 10-yr

Avg. Class Size

+30.8% (+4 students) 10-yr

27%

Students of Color

+22.7% (+5.0 pp) 10-yr

7:1

Student-Teacher Ratio

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Enrollment & Diversity

Category

This Town (Mercer Island)

This State (WA)

# Schools

6 Schools

786 Schools

View Data

Trends in Total Number of Private Schools
Year	Mercer Island, WA Total Schools
2025	7
2024	7
2023	7
2022	6
2021	7
2020	7
2019	7
2018	7
2017	7
2016	7
2015	8

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# Students

939 Students

119,894 Students

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Trends in the Average Number of Students Per Private School
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	153	172	179
2024	153	170	172
2023	165	163	174
2022	183	157	185
2021	148	157	180
2020	148	151	171
2019	139	152	175
2018	136	150	172
2017	165	151	180
2016	166	148	178
2015	158	144	167

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% Students of Color

27%

32%

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Percentage of Students of Color Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	23%	31%	34%
2024	23%	29%	34%
2023	49%	32%	33%
2022	50%	29%	33%
2021	55%	28%	32%
2020	55%	27%	32%
2019	23%	27%	31%
2018	23%	26%	31%
2017	23%	30%	32%
2016	24%	29%	32%
2015	22%	28%	32%

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0.72

0.64

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Diversity Score Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	0.71	0.64	0.65
2024	0.71	0.64	0.65
2023	0.71	0.64	0.65
2022	0.71	0.62	0.64
2021	0.71	0.63	0.64
2020	0.71	0.63	0.64
2019	0.56	0.61	0.63
2018	0.55	0.62	0.63
2017	0.56	0.61	0.61
2016	0.56	0.60	0.61
2015	0.56	0.60	0.61

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▼ Show more data/charts: racial breakdown

# American Indian Students

3 Students

1,228 Students

% American Indian Students

n/a

# Asian Students

47 Students

9,040 Students

% Asian Students

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Asian Student Percentage Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	5%	8%	5%
2024	5%	8%	5%
2023	5%	8%	5%
2022	8%	7%	4%
2021	8%	7%	4%
2020	8%	7%	4%
2019	5%	6%	4%
2018	6%	6%	4%
2017	5%	6%	4%
2016	5%	6%	4%
2015	5%	6%	4%

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# Hispanic Students

297 Students

6,307 Students

% Hispanic Students

30%

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Hispanic Student Percentage Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	27%	5%	9%
2024	27%	5%	9%
2023	25%	5%	9%
2022	25%	5%	8%
2021	25%	5%	9%
2020	25%	5%	9%
2019	3%	5%	8%
2018	3%	5%	8%
2017	2%	5%	8%
2016	2%	5%	8%
2015	2%	5%	8%

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# Black Students

22 Students

3,815 Students

% Black Students

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Black Student Percentage Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	2%	3%	7%
2024	2%	3%	7%
2023	2%	3%	8%
2022	2%	3%	7%
2021	2%	3%	7%
2020	2%	3%	8%
2019	1%	3%	7%
2018	1%	3%	7%
2017	1%	3%	7%
2016	1%	3%	7%
2015	1%	3%	8%

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# White Students

340 Students

59,141 Students

% White Students

35%

50%

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White Student Percentage Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	32%	50%	52%
2024	32%	50%	52%
2023	38%	51%	52%
2022	39%	53%	54%
2021	40%	53%	54%
2020	40%	53%	54%
2019	57%	55%	56%
2018	59%	55%	56%
2017	55%	56%	58%
2016	55%	56%	58%
2015	55%	57%	58%

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# Hawaiian Students

n/a

651 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

273 Students

38,328 Students

% of Others Students

28%

32%

View Data

Other Races Student Percentage Trends
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	34%	32%	26%
2024	34%	32%	26%
2023	30%	31%	25%
2022	26%	30%	25%
2021	25%	30%	25%
2020	25%	29%	24%
2019	34%	29%	24%
2018	31%	29%	23%
2017	37%	28%	22%
2016	37%	28%	22%
2015	37%	27%	21%

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All Ethnic Groups

Academics

# Teachers

64 Teachers

10,039 Teachers

Average Student-Teacher Ratio

7:1

12:1

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Student-Teacher Ratio Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	5:1	12:1	11:1
2024	5:1	12:1	11:1
2023	8:1	12:1	11:1
2022	8:1	12:1	11:1
2021	7:1	12:1	11:1
2020	7:1	12:1	12:1
2019	5:1	12:1	12:1
2018	6:1	12:1	12:1
2017	7:1	12:1	12:1
2016	7:1	12:1	12:1
2015	7:1	12:1	12:1

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% Average Faculty w/Advanced Degree

90%

59%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	70%	58%	55%
2024	70%	57%	54%
2023	80%	58%	54%
2022	80%	57%	54%
2021	80%	57%	54%
2020	80%	57%	54%
2019	80%	56%	53%
2018	80%	55%	53%
2017	80%	55%	53%
2016	80%	54%	52%
2015	80%	55%	52%

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Average Class Size

17 students

15 students

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Class Size Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	13	16	15
2024	13	16	15
2023	13	16	15
2022	13	15	15
2021	11	15	15
2020	11	15	15
2019	10	15	15
2018	11	15	15
2017	11	15	15
2016	12	15	15
2015	13	15	15

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Average Number of AP Courses

6 courses

11 courses

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Trends in Average Number of AP Courses Offered
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	7	10	13
2024	7	8	12
2023	7	9	11
2022	8	8	11
2021	8	8	11
2020	10	8	11
2019	10	8	11
2018	3	8	11
2017	3	8	10
2016	6	7	10
2015	6	7	10

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Average SAT score

1380

(Out of 1600)

1273

View Data

SAT Score Trends (2017-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	1380	1264	1233
2024	1380	1257	1230
2023	1380	1228	1228
2022	1380	1235	1229
2021	1380	1242	1229
2020	1380	1233	1226
2019	1380	1247	1226
2018	1380	1241	1226
2017	1380	1255	1233

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Average ACT score

(Out of 36)

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ACT Score Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	29	29	26
2024	29	28	26
2023	29	27	26
2022	29	28	26
2021	29	28	26
2020	29	28	25
2019	29	27	25
2018	29	27	25
2017	29	27	25
2016	29	27	25
2015	28	27	25

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Tuition & Aid

Average Yearly Tuition Cost

$27,725

$15,804

View Data

Tuition Cost Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	$27,325	$15,533	$15,012
2024	$33,138	$14,062	$13,254
2023	$26,013	$13,102	$12,626
2022	$24,389	$12,138	$12,187
2021	$20,400	$11,838	$11,800
2020	$20,400	$11,300	$11,512
2019	$20,400	$10,936	$11,293
2018	$20,400	$10,668	$11,017
2017	$19,438	$10,030	$10,708
2016	$19,438	$9,472	$10,356
2015	$17,050	$9,211	$9,939

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Average % on Financial Aid

41%

28%

View Data

Percent on Financial Aid Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	41%	29%	34%
2024	41%	28%	34%
2023	36%	27%	34%
2022	36%	27%	33%
2021	36%	26%	33%
2020	36%	27%	32%
2019	36%	27%	31%
2018	36%	26%	30%
2017	36%	25%	30%
2016	36%	23%	29%
2015	36%	23%	28%

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Average Financial Aid Grant

$15,900

$8,970

View Data

Financial Aid Grant Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	$15,900	$8,921	$7,073
2024	$15,900	$8,821	$6,930
2023	$14,756	$6,927	$6,469
2022	$14,756	$6,141	$6,289
2021	$13,500	$6,073	$6,055
2020	$13,500	$5,578	$5,921
2019	$13,500	$5,841	$5,795
2018	$13,500	$5,265	$5,456
2017	$13,500	$5,049	$5,319
2016	$13,500	$5,147	$5,105
2015	$8,034	$4,878	$5,030

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Average Endowment Size

$2 million

$41.82 million

View Data

Endowment Trends (2022-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	$2 M	$41 M	$60 M
2024	$2 M	$8 M	$59 M
2023	$2 M	$6 M	$71 M
2022	$2 M	$7 M	$76 M

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Admissions & Athletics

Average Acceptance Rate

60%

82%

View Data

Acceptance Rate Trends (2015-2025)
Year	Mercer Island, WA Avg	Washington (WA)	National
2025	70%	82%	81%
2024	90%	85%	85%
2023	90%	85%	85%
2022	90%	85%	85%
2021	90%	85%	85%
2020	90%	85%	85%
2019	90%	84%	85%
2018	100%	84%	85%
2017	100%	84%	85%
2016	100%	82%	85%
2015	100%	81%	85%

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Average Number of Extracurriculars

14 extracurriculars

8 extracurriculars

Average Number of Sports

5 sports

6 sports

Frequently Asked Questions

What are the top ranked private schools in Mercer Island, WA?

The private schools in Mercer Island, WA include Northwest Yeshiva High School, French American School of Puget Sound, and St. Monica Catholic School.

How many private schools are located in Mercer Island?

6 private schools are located in Mercer Island.

How diverse are private schools in Mercer Island?

Mercer Island private schools are approximately 27% minority students, which is lower than the Washington private school average of 32%.

What percentage of students in Mercer Island go to private school?

19% of all K-12 students in Mercer Island are educated in private schools (compared to the WA state average of 10%).

What percentage of private schools are religiously affiliated in Mercer Island?

33% of private schools in Mercer Island are religiously affiliated (most commonly Jewish and Catholic).

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Quick Facts (2026)

Quick Facts (2026)

Top Ranked Mercer Island Private Schools (2026)

Mercer Island, Washington Private Schools (Closed)

Mercer Island, WA Private School Trends (10-Year)

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)

Diversity Score Trends

Asian Student Percentage Trends

Hispanic Student Percentage Trends

Black Student Percentage Trends

White Student Percentage Trends

Other Races Student Percentage Trends

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 (2015-2025)

Tuition Cost Trends (2015-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Endowment Trends (2022-2025)

Acceptance Rate Trends (2015-2025)

Frequently Asked Questions

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