[+] Show Closed Private Schools in Altadena, California

Altadena, California Private Schools (Closed)

Hathaway-Sycamores School

Gr: K-12

Alternative School

2933 El Nido Drive

Altadena, CA 91001

(626) 395-7100

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Oak Knoll Montessori School

Gr: PK | 112 students

Montessori School

3544 Canon Blvd

Altadena, CA 91001

(626) 345-9929

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Altadena, CA Private School Trends (10-Year)

Private Schools

-8.3% (-1 school) 10-yr

1,351

Students

-9.8% (-147 students) 10-yr

$19,782

Avg. Tuition

+26.0% (+$4,080) 10-yr

Avg. Class Size

-10.5% (-2 students) 10-yr

54%

Students of Color

+22.7% (+10.0 pp) 10-yr

11:1

Student-Teacher Ratio

+10.0% (+1.0) 10-yr

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Enrollment & Diversity

Category

This Town (Altadena)

This State (CA)

# Schools

11 Schools

3,911 Schools

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Trends in Total Number of Private Schools
Year	Altadena, CA Total Schools
2025	11
2024	13
2023	11
2022	11
2021	12
2020	13
2019	12
2018	12
2017	12
2016	12
2015	12

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# Students

1,351 Students

659,573 Students

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Trends in the Average Number of Students Per Private School
Year	Altadena, CA Avg	California (CA)	National
2025	123	180	179
2024	129	175	172
2023	152	181	174
2022	138	189	185
2021	140	185	180
2020	132	179	171
2019	123	179	175
2018	121	173	172
2017	132	179	180
2016	136	173	178
2015	125	162	167

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% Students of Color

54%

52%

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Percentage of Students of Color Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	54%	51%	34%
2024	51%	51%	34%
2023	41%	50%	33%
2022	49%	48%	33%
2021	35%	48%	32%
2020	36%	48%	32%
2019	48%	48%	31%
2018	48%	47%	31%
2017	41%	50%	32%
2016	43%	49%	32%
2015	44%	49%	32%

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0.74

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Diversity Score Trends
Year	Altadena, CA Avg	California (CA)	National
2025	0.74	0.74	0.65
2024	0.75	0.74	0.65
2023	0.67	0.74	0.65
2022	0.67	0.73	0.64
2021	0.67	0.73	0.64
2020	0.68	0.73	0.64
2019	0.67	0.73	0.63
2018	0.67	0.73	0.63
2017	0.49	0.72	0.61
2016	0.52	0.72	0.61
2015	0.54	0.72	0.61

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Show more data/charts: racial breakdown

# American Indian Students

1 Student

3,575 Students

% American Indian Students

n/a

# Asian Students

45 Students

71,836 Students

% Asian Students

11%

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Asian Student Percentage Trends
Year	Altadena, CA Avg	California (CA)	National
2025	5%	11%	5%
2024	10%	11%	5%
2023	5%	11%	5%
2022	5%	10%	4%
2021	5%	10%	4%
2020	6%	10%	4%
2019	5%	10%	4%
2018	5%	10%	4%
2017	4%	10%	4%
2016	4%	10%	4%
2015	5%	10%	4%

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# Hispanic Students

152 Students

104,429 Students

% Hispanic Students

18%

16%

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Hispanic Student Percentage Trends
Year	Altadena, CA Avg	California (CA)	National
2025	18%	16%	9%
2024	15%	16%	9%
2023	10%	16%	9%
2022	11%	16%	8%
2021	11%	16%	9%
2020	11%	16%	9%
2019	25%	16%	8%
2018	25%	17%	8%
2017	10%	17%	8%
2016	10%	17%	8%
2015	9%	17%	8%

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# Black Students

90 Students

30,223 Students

% Black Students

11%

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Black Student Percentage Trends
Year	Altadena, CA Avg	California (CA)	National
2025	11%	5%	7%
2024	9%	5%	7%
2023	9%	5%	8%
2022	9%	4%	7%
2021	9%	5%	7%
2020	9%	5%	8%
2019	8%	4%	7%
2018	8%	4%	7%
2017	7%	5%	7%
2016	7%	5%	7%
2015	6%	5%	8%

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# White Students

271 Students

235,809 Students

% White Students

32%

37%

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White Student Percentage Trends
Year	Altadena, CA Avg	California (CA)	National
2025	32%	37%	52%
2024	34%	37%	52%
2023	48%	38%	52%
2022	50%	40%	54%
2021	50%	40%	54%
2020	49%	40%	54%
2019	49%	41%	56%
2018	49%	41%	56%
2017	70%	43%	58%
2016	68%	43%	58%
2015	66%	43%	58%

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# Hawaiian Students

n/a

5,499 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

285 Students

188,502 Students

% of Others Students

34%

29%

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Other Races Student Percentage Trends
Year	Altadena, CA Avg	California (CA)	National
2025	34%	29%	26%
2024	32%	29%	26%
2023	28%	28%	25%
2022	25%	28%	25%
2021	25%	27%	25%
2020	25%	27%	24%
2019	13%	26%	24%
2018	13%	26%	23%
2017	9%	24%	22%
2016	11%	24%	22%
2015	14%	23%	21%

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All Ethnic Groups

Academics

# Teachers

119 Teachers

55,645 Teachers

Average Student-Teacher Ratio

11:1

12:1

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Student-Teacher Ratio Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	11:1	12:1	11:1
2024	11:1	12:1	11:1
2023	12:1	12:1	11:1
2022	12:1	12:1	11:1
2021	12:1	13:1	11:1
2020	12:1	13:1	12:1
2019	11:1	12:1	12:1
2018	11:1	12:1	12:1
2017	11:1	13:1	12:1
2016	11:1	13:1	12:1
2015	10:1	13:1	12:1

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% Average Faculty w/Advanced Degree

25%

59%

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Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	25%	59%	55%
2024	25%	58%	54%
2023	25%	58%	54%
2022	25%	59%	54%
2021	25%	59%	54%
2020	25%	58%	54%
2019	25%	58%	53%
2018	25%	58%	53%
2017	25%	58%	53%
2016	25%	57%	52%
2015	25%	57%	52%

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Average Class Size

17 students

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Class Size Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	17	17	15
2024	19	17	15
2023	21	17	15
2022	24	17	15
2021	24	17	15
2020	20	17	15
2019	18	17	15
2018	18	17	15
2017	20	17	15
2016	18	17	15
2015	19	17	15

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Tuition & Aid

Average Yearly Tuition Cost

$19,782

$18,344

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Tuition Cost Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	$19,782	$18,076	$15,012
2024	$19,113	$17,195	$13,254
2023	$21,784	$16,660	$12,626
2022	$12,500	$15,979	$12,187
2021	$12,697	$15,298	$11,800
2020	$12,023	$14,748	$11,512
2019	$11,838	$14,369	$11,293
2018	$11,838	$13,813	$11,017
2017	$12,838	$13,422	$10,708
2016	$15,702	$12,852	$10,356
2015	$15,702	$11,932	$9,939

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Average % on Financial Aid

28%

29%

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Percent on Financial Aid Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	28%	29%	34%
2024	28%	29%	34%
2023	28%	29%	34%
2022	28%	28%	33%
2021	29%	28%	33%
2020	29%	28%	32%
2019	29%	27%	31%
2018	29%	27%	30%
2017	29%	27%	30%
2016	29%	26%	29%
2015	29%	25%	28%

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Average Financial Aid Grant

$12,000

$9,066

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Financial Aid Grant Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	$12,000	$8,932	$7,073
2024	$12,000	$8,712	$6,930
2023	$12,000	$8,186	$6,469
2022	$12,000	$8,205	$6,289
2021	$8,150	$7,081	$6,055
2020	$8,150	$6,794	$5,921
2019	$8,150	$6,413	$5,795
2018	$8,150	$5,977	$5,456
2017	$8,150	$5,752	$5,319
2016	$5,750	$5,279	$5,105
2015	$5,750	$5,100	$5,030

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Admissions & Athletics

Average Acceptance Rate

78%

80%

View Data

Acceptance Rate Trends (2015-2025)
Year	Altadena, CA Avg	California (CA)	National
2025	78%	80%	81%
2024	78%	84%	85%
2023	80%	84%	85%
2022	80%	84%	85%
2021	80%	84%	85%
2020	89%	84%	85%
2019	84%	84%	85%
2018	84%	84%	85%
2017	84%	85%	85%
2016	84%	84%	85%
2015	84%	84%	85%

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Average Number of Extracurriculars

9 extracurriculars

Average Number of Sports

6 sports

7 sports

Frequently Asked Questions

What are the top ranked private schools in Altadena, CA?

The private schools in Altadena, CA include Pasadena Waldorf School and Pasadena Waldorf High School.

How many private schools are located in Altadena?

11 private schools are located in Altadena.

How diverse are private schools in Altadena?

Altadena private schools are approximately 54% minority students, which is higher than the California private school average of 52%.

What percentage of students in Altadena go to private school?

36% of all K-12 students in Altadena are educated in private schools (compared to the CA state average of 10%).

What percentage of private schools are religiously affiliated in Altadena?

18% of private schools in Altadena are religiously affiliated (most commonly Christian and Catholic).

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Quick Facts (2026-27)

Quick Facts (2026-27)

Top Ranked Altadena Private Schools (2026-27)

Altadena, California Private Schools (Closed)

Altadena, CA 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)

Tuition Cost Trends (2015-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

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