[+] Show Closed Private Schools in San Mateo County, California

San Mateo County Private Schools (Closed)

A Childs Way

Gr: K | 21 students

Daycare / Preschool

817 Murchison Dr

Millbrae, CA 94030

(650) 697-4760

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The Discovery Center School

Gr: PK-12 | 11 students

Avg. class size: 12 students

452 5th Avenue

Redwood City, CA 94063

(650) 367-6791

(4)

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Kindercourt Academy

Gr: K | 69 students

Daycare / Preschool

1225 Greenwood Ave

San Carlos, CA 94070

(650) 591-4882

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Mater Dolorosa School

Gr: K-8 | 203 students

Catholic

1040 Miller Avenue

South San Francisco, CA 94080

(650) 588-8175

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Newton

Gr: K-8 | 243 students

Specialized Curriculum

1157 Chess Drive Ste 100

San Mateo, CA 94404

(650) 345-4043

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Peninsula Christian School

Gr: PK-8 | 101 students

Assembly of God

1305 Middlefield Road

Redwood City, CA 94063

(650) 366-3842

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Roger Williams Academy

Gr: 4-10 | 15 students

Calvinist

600 Grand Ave

South San Francisco, CA 94080

(415) 238-9669

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Overview

Academics and Faculty:

# Teachers

2,552 Teachers

55,838 Teachers

Average Student-Teacher Ratio

9:1

12:1

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Showing 2016–2025. Full 11-year historical data available below ↓

Student-Teacher Ratio Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	9:1	12:1	11:1
2024	9:1	12:1	11:1
2023	9:1	12:1	11:1
2022	9:1	12:1	11:1
2021	9:1	13:1	11:1
2020	10:1	13:1	12:1
2019	10:1	12:1	12:1
2018	10:1	12:1	12:1
2017	11:1	13:1	12:1
2016	11:1	13:1	12:1
2015	11:1	13:1	12:1

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% Average Faculty w/Advanced Degree

64%

60%

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Showing 2016–2025. Full 11-year historical data available below ↓

Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	64%	59%	55%
2024	65%	58%	54%
2023	66%	58%	54%
2022	68%	59%	54%
2021	66%	59%	54%
2020	67%	58%	54%
2019	67%	58%	53%
2018	63%	58%	53%
2017	63%	58%	53%
2016	59%	57%	52%
2015	52%	57%	52%

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Average Class Size

17 students

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Showing 2016–2025. Full 11-year historical data available below ↓

Class Size Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	17	17	15
2024	16	17	15
2023	16	17	15
2022	16	17	15
2021	18	17	15
2020	18	17	15
2019	18	17	15
2018	18	17	15
2017	18	17	15
2016	18	17	15
2015	18	17	15

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Average Number of AP Courses

18 courses

15 courses

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Showing 2016–2025. Full 11-year historical data available below ↓

Trends in Average Number of AP Courses Offered
Year	San Mateo County Average	California (CA) Average	National Average
2025	17	15	13
2024	17	14	12
2023	16	13	11
2022	16	13	11
2021	15	13	11
2020	14	13	11
2019	15	13	11
2018	14	13	11
2017	14	12	10
2016	14	12	10
2015	11	11	10

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Average SAT score

1175

(Out of 1600)

1267

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SAT Score Trends (2019-2024)
Year	San Mateo County Average	California (CA) Average	National Average
2024	1120	1248	1230
2023	1169	1246	1228
2022	1097	1250	1229
2019	1137	1239	1226

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Average ACT score

(Out of 36)

Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$26,299

$17,598

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Showing 2016–2025. Full 11-year historical data available below ↓

Tuition Cost Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	$25,305	$18,076	$15,012
2024	$24,369	$17,621	$14,622
2023	$23,387	$16,909	$14,057
2022	$22,111	$16,046	$13,504
2021	$21,656	$15,652	$13,232
2020	$20,926	$15,031	$12,915
2019	$20,418	$14,653	$12,656
2018	$20,053	$14,331	$12,363
2017	$19,206	$13,898	$12,049
2016	$18,030	$13,459	$11,633
2015	$17,128	$12,820	$11,174

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Average Summer Program Cost

$602

$1,072

Average % on Financial Aid

22%

29%

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Showing 2016–2025. Full 11-year historical data available below ↓

Percent on Financial Aid Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	22%	29%	34%
2024	22%	29%	34%
2023	21%	29%	34%
2022	21%	28%	33%
2021	21%	28%	33%
2020	22%	28%	32%
2019	22%	27%	31%
2018	25%	27%	30%
2017	23%	27%	30%
2016	23%	26%	29%
2015	24%	25%	28%

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Average Financial Aid Grant

$18,383

$9,629

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Showing 2016–2025. Full 11-year historical data available below ↓

Financial Aid Grant Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	$17,125	$8,932	$7,073
2024	$16,430	$8,712	$6,930
2023	$14,495	$8,186	$6,469
2022	$14,057	$8,205	$6,289
2021	$13,284	$7,081	$6,055
2020	$13,018	$6,794	$5,921
2019	$13,018	$6,413	$5,795
2018	$12,351	$5,977	$5,456
2017	$11,083	$5,752	$5,319
2016	$9,692	$5,279	$5,105
2015	$5,862	$5,100	$5,030

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Average Acceptance Rate

70%

83%

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Showing 2016–2025. Full 11-year historical data available below ↓

Acceptance Rate Trends (2015-2025)
Year	San Mateo County Average	California (CA) Average	National Average
2025	67%	80%	81%
2024	71%	84%	85%
2023	72%	84%	85%
2022	72%	84%	85%
2021	71%	84%	85%
2020	70%	84%	85%
2019	69%	84%	85%
2018	69%	84%	85%
2017	67%	85%	85%
2016	67%	84%	85%
2015	81%	84%	85%

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Average Endowment Size

$29.75 million

$18.27 million

Students by Ethnicity:

0.71

0.74

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Showing 2016–2025. Full 11-year historical data available below ↓

Diversity Score Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	0.71	0.74	0.65
2024	0.71	0.74	0.65
2023	0.70	0.74	0.65
2022	0.71	0.73	0.64
2021	0.71	0.73	0.64
2020	0.70	0.73	0.64
2019	0.69	0.73	0.63
2018	0.70	0.73	0.63
2017	0.68	0.72	0.61
2016	0.69	0.72	0.61
2015	0.68	0.72	0.61

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# American Indian Students

80 Students

3,574 Students

% American Indian Students

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Percentage of Private School Students of American Indian Trends
Year	San Mateo County Average	California (CA) Average	National Average
2023	2%	1%	1%
2022	1%	1%	2%
2021	2%	1%	1%
2020	2%	1%	1%
2019	3%	2%	1%
2018	2%	1%	2%
2017	1%	1%	1%
2016	1%	1%	1%
2015	2%	2%	1%

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# Asian Students

3,730 Students

71,777 Students

% Asian Students

18%

11%

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Showing 2016–2025. Full 11-year historical data available below ↓

Asian Student Percentage Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	19%	11%	5%
2024	19%	11%	5%
2023	17%	11%	5%
2022	15%	10%	4%
2021	15%	10%	4%
2020	16%	10%	4%
2019	13%	10%	4%
2018	13%	10%	4%
2017	15%	10%	4%
2016	15%	10%	4%
2015	15%	10%	4%

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# Hispanic Students

1,529 Students

104,405 Students

% Hispanic Students

16%

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Showing 2016–2025. Full 11-year historical data available below ↓

Hispanic Student Percentage Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	7%	16%	9%
2024	7%	16%	9%
2023	8%	16%	9%
2022	10%	16%	8%
2021	10%	16%	9%
2020	10%	16%	9%
2019	11%	16%	8%
2018	11%	17%	8%
2017	10%	17%	8%
2016	12%	17%	8%
2015	12%	17%	8%

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# Black Students

284 Students

30,221 Students

% Black Students

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Showing 2016–2025. Full 11-year historical data available below ↓

Black Student Percentage Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	1%	5%	7%
2024	1%	5%	7%
2023	1%	5%	8%
2022	1%	4%	7%
2021	1%	5%	7%
2020	1%	5%	8%
2019	1%	4%	7%
2018	2%	4%	7%
2017	2%	5%	7%
2016	2%	5%	7%
2015	2%	5%	8%

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# White Students

8,269 Students

235,730 Students

% White Students

40%

37%

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Showing 2016–2025. Full 11-year historical data available below ↓

White Student Percentage Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	40%	37%	52%
2024	40%	37%	52%
2023	42%	38%	52%
2022	42%	40%	54%
2021	43%	40%	54%
2020	45%	40%	54%
2019	46%	41%	56%
2018	45%	41%	56%
2017	49%	43%	58%
2016	49%	43%	58%
2015	50%	43%	58%

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# Hawaiian Students

143 Students

5,499 Students

% Hawaiian Students

# Others Students

6,714 Students

188,707 Students

% of Others Students

32%

29%

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Showing 2016–2025. Full 11-year historical data available below ↓

Other Races Student Percentage Trends
Year	San Mateo County Average	California (CA) Average	National Average
2025	32%	29%	26%
2024	32%	29%	26%
2023	30%	28%	25%
2022	31%	28%	25%
2021	29%	27%	25%
2020	26%	27%	24%
2019	26%	26%	24%
2018	27%	26%	23%
2017	23%	24%	22%
2016	21%	24%	22%
2015	19%	23%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

8 extracurriculars

9 extracurriculars

Average Number of Sports

6 sports

7 sports

Frequently Asked Questions

What are the top ranked private schools in San Mateo County, CA?

The private schools in San Mateo County, CA include Crystal Springs, Mercy High School, and The Carey School.

How many private schools are located in San Mateo County?

116 private schools are located in San Mateo County.

How much do private schools cost in San Mateo County?

The average tuition cost is $26,299, which is higher than the California private school average tuition cost of $17,598.

How diverse are private schools in San Mateo County?

San Mateo County private schools are approximately 45% minority students, which is lower than the California private school average of 52%.

What percentage of students in San Mateo County go to private school?

21% of all K-12 students in San Mateo County are educated in private schools (compared to the CA state average of 10%).

What percentage of private schools are religiously affiliated in San Mateo County?

36% of private schools in San Mateo County are religiously affiliated (most commonly Catholic and Christian).

Which private schools in San Mateo County are often viewed compared to one another?

Popular comparisons of private schools in San Mateo County include: Roberts School vs. University Heights Montessori Children's Center, Mercy High School vs. Notre Dame High School, Notre Dame High School vs. Mercy High School

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