[+] Show Closed Private Schools in St. Louis County, Missouri

Overview

Academics and Faculty:

# Teachers

3,582 Teachers

9,962 Teachers

Average Student-Teacher Ratio

11:1

12:1

View Data

Student-Teacher Ratio Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	11:1	12:1	11:1
2024	11:1	12:1	11:1
2023	12:1	13:1	11:1
2022	12:1	13:1	11:1
2021	12:1	13:1	11:1
2020	12:1	13:1	12:1
2019	12:1	12:1	12:1
2018	12:1	13:1	12:1
2017	11:1	12:1	12:1
2016	12:1	12:1	12:1
2015	11:1	12:1	12:1

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% Average Faculty w/Advanced Degree

59%

56%

View Data

Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	59%	56%	55%
2024	59%	55%	54%
2023	59%	55%	54%
2022	59%	55%	54%
2021	59%	55%	54%
2020	58%	56%	54%
2019	56%	54%	53%
2018	56%	53%	53%
2017	57%	53%	53%
2016	56%	51%	52%
2015	51%	50%	52%

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Average Class Size

15 students

16 students

View Data

Class Size Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	15	16	15
2024	15	15	15
2023	15	15	15
2022	15	15	15
2021	15	15	15
2020	15	15	15
2019	16	15	15
2018	16	15	15
2017	16	15	15
2016	16	15	15
2015	16	15	15

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Average Number of AP Courses

17 courses

15 courses

View Data

Trends in Average Number of AP Courses Offered
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	17	15	13
2024	14	14	12
2023	14	13	11
2022	15	14	11
2021	14	15	11
2020	14	15	11
2019	13	14	11
2018	12	13	11
2017	12	13	10
2016	12	12	10
2015	12	10	10

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Average SAT score

1303

(Out of 1600)

1291

View Data

SAT Score Trends (2017-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	1303	1291	1233
2024	1317	1291	1230
2023	1312	1290	1228
2022	1328	1297	1229
2021	1378	1306	1229
2020	1379	1306	1226
2019	1390	1311	1226
2018	1378	1283	1226
2017	1362	1316	1233

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Average ACT score

(Out of 36)

View Data

ACT Score Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	26	26	26
2024	27	26	26
2023	26	26	26
2022	27	26	26
2021	27	26	26
2020	27	26	25
2019	27	26	25
2018	26	26	25
2017	27	26	25
2016	26	25	25
2015	26	25	25

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Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$16,355

$11,351

View Data

Tuition Cost Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	$16,566	$13,089	$15,012
2024	$16,555	$11,380	$13,254
2023	$15,298	$10,498	$12,626
2022	$14,926	$10,411	$12,187
2021	$14,420	$10,172	$11,800
2020	$14,030	$10,089	$11,512
2019	$13,397	$9,711	$11,293
2018	$13,251	$9,659	$11,017
2017	$13,104	$9,528	$10,708
2016	$11,416	$8,608	$10,356
2015	$12,760	$9,126	$9,939

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Average Summer Program Cost

$1,138

$728

View Data

Summer Program Cost Trends (2019-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	$460	$288	$1,152
2024	$473	$301	$1,128
2023	$604	$375	$1,156
2022	$621	$366	$1,102
2021	$643	$401	$1,125
2020	$586	$392	$1,217
2019	$453	$317	$1,305

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Average % on Financial Aid

34%

36%

View Data

Percent on Financial Aid Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	34%	36%	34%
2024	33%	36%	34%
2023	35%	36%	34%
2022	33%	35%	33%
2021	32%	35%	33%
2020	33%	34%	32%
2019	31%	33%	31%
2018	30%	33%	30%
2017	30%	32%	30%
2016	39%	33%	29%
2015	32%	34%	28%

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Average Financial Aid Grant

$7,403

$5,716

View Data

Financial Aid Grant Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	$8,217	$6,130	$7,073
2024	$7,892	$6,030	$6,930
2023	$6,979	$4,774	$6,469
2022	$7,472	$4,778	$6,289
2021	$7,424	$7,188	$6,055
2020	$7,211	$7,387	$5,921
2019	$7,725	$7,583	$5,795
2018	$6,854	$7,540	$5,456
2017	$5,764	$7,202	$5,319
2016	$5,753	$7,471	$5,105
2015	$5,854	$8,065	$5,030

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Average Acceptance Rate

84%

87%

View Data

Acceptance Rate Trends (2015-2025)
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	84%	85%	81%
2024	87%	89%	85%
2023	88%	89%	85%
2022	87%	88%	85%
2021	88%	88%	85%
2020	87%	88%	85%
2019	85%	87%	85%
2018	85%	88%	85%
2017	85%	88%	85%
2016	85%	89%	85%
2015	90%	89%	85%

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Average Endowment Size

$9.36 million

$12.32 million

Students by Ethnicity:

0.53

0.55

View Data

Diversity Score Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	0.53	0.55	0.65
2024	0.54	0.56	0.65
2023	0.54	0.54	0.65
2022	0.49	0.52	0.64
2021	0.51	0.52	0.64
2020	0.52	0.52	0.64
2019	0.49	0.50	0.63
2018	0.49	0.50	0.63
2017	0.45	0.46	0.61
2016	0.48	0.46	0.61
2015	0.44	0.45	0.61

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# American Indian Students

90 Students

283 Students

% American Indian Students

n/a

# Asian Students

901 Students

3,147 Students

% Asian Students

View Data

Asian Student Percentage Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	3%	4%	5%
2024	4%	4%	5%
2023	4%	3%	5%
2022	2%	4%	4%
2021	3%	3%	4%
2020	3%	3%	4%
2019	2%	3%	4%
2018	2%	3%	4%
2017	3%	2%	4%
2016	2%	3%	4%
2015	3%	3%	4%

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# Hispanic Students

1,151 Students

5,325 Students

% Hispanic Students

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Hispanic Student Percentage Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	3%	5%	9%
2024	3%	4%	9%
2023	2%	3%	9%
2022	2%	3%	8%
2021	3%	3%	9%
2020	3%	3%	9%
2019	2%	3%	8%
2018	2%	3%	8%
2017	2%	2%	8%
2016	2%	2%	8%
2015	1%	2%	8%

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# Black Students

3,049 Students

7,603 Students

% Black Students

View Data

Black Student Percentage Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	8%	6%	7%
2024	8%	7%	7%
2023	9%	7%	8%
2022	7%	6%	7%
2021	8%	7%	7%
2020	9%	7%	8%
2019	9%	7%	7%
2018	9%	7%	7%
2017	8%	7%	7%
2016	11%	7%	7%
2015	8%	7%	8%

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# White Students

23,916 Students

73,073 Students

% White Students

65%

62%

View Data

White Student Percentage Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	65%	62%	52%
2024	65%	62%	52%
2023	64%	64%	52%
2022	69%	66%	54%
2021	67%	66%	54%
2020	66%	66%	54%
2019	69%	68%	56%
2018	69%	68%	56%
2017	72%	71%	58%
2016	70%	71%	58%
2015	73%	72%	58%

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# Hawaiian Students

41 Students

218 Students

% Hawaiian Students

n/a

# Two or more races Students

n/a

% of Two or more races Students

n/a

# Others Students

7,750 Students

27,609 Students

% of Others Students

21%

24%

View Data

Other Races Student Percentage Trends
Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	21%	23%	26%
2024	20%	23%	26%
2023	21%	23%	25%
2022	18%	21%	25%
2021	19%	21%	25%
2020	19%	21%	24%
2019	17%	19%	24%
2018	17%	19%	23%
2017	15%	18%	22%
2016	15%	17%	22%
2015	15%	16%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

11 extracurriculars

10 extracurriculars

Average Number of Sports

8 sports

7 sports

Frequently Asked Questions

What are the top ranked private schools in St. Louis County, MO?

The private schools in St. Louis County, MO include Christian Brothers College High School, Chaminade College Preparatory School, and Chaminade College Prep School.

How many private schools are located in St. Louis County?

181 private schools are located in St. Louis County.

How much do private schools cost in St. Louis County?

The average tuition cost is $16,355, which is higher than the Missouri private school average tuition cost of $11,351.

How diverse are private schools in St. Louis County?

St. Louis County private schools are approximately 23% minority students, which is higher than the Missouri private school average of 21%.

What percentage of students in St. Louis County go to private school?

22% of all K-12 students in St. Louis County are educated in private schools (compared to the MO state average of 12%).

What percentage of private schools are religiously affiliated in St. Louis County?

63% of private schools in St. Louis County are religiously affiliated (most commonly Catholic and Christian).

Which private schools in St. Louis County are often viewed compared to one another?

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Year	St. Louis County Average	Missouri (MO) Average	National Average
2025	233	194	179
2024	240	190	172
2023	236	185	174
2022	239	196	185
2021	236	192	180
2020	227	183	171
2019	224	184	175
2018	225	183	172
2017	230	190	180
2016	226	188	178
2015	234	180	167

Quick Facts (26-27)

Quick Facts (26-27)

Top Ranked St. Louis County Private Schools (2026-27)

St. Louis 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 (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2019-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Students by Ethnicity:

Diversity Score 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

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Best St. Louis County Private Schools

Top Ranked St. Louis County Private Schools (2026-27)

St. Louis 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 (2015-2025)

Tuition and Acceptance Rate:

Tuition Cost Trends (2015-2025)

Summer Program Cost Trends (2019-2025)

Percent on Financial Aid Trends (2015-2025)

Financial Aid Grant Trends (2015-2025)

Acceptance Rate Trends (2015-2025)

Students by Ethnicity:

Diversity Score 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