Overview

Academics and Faculty:

# Teachers

775 Teachers

9,942 Teachers

Average Student-Teacher Ratio

15:1

12:1

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

Student-Teacher Ratio Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	16:1	12:1	11:1
2024	16:1	12:1	11:1
2023	14:1	13:1	11:1
2022	14:1	13:1	11:1
2021	14:1	13:1	11:1
2020	16:1	13:1	12:1
2019	15:1	12:1	12:1
2018	15:1	13:1	12:1
2017	15:1	12:1	12:1
2016	15:1	12:1	12:1
2015	16:1	12:1	12:1

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% Average Faculty w/Advanced Degree

57%

56%

View Data

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

Percentage of Faculty With Advanced Degrees Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	57%	56%	55%
2024	57%	55%	54%
2023	61%	55%	54%
2022	60%	55%	54%
2021	58%	55%	54%
2020	65%	56%	54%
2019	63%	54%	53%
2018	63%	53%	53%
2017	63%	53%	53%
2016	60%	51%	52%
2015	60%	50%	52%

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Average Class Size

18 students

16 students

View Data

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

Class Size Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	17	16	15
2024	17	15	15
2023	17	15	15
2022	17	15	15
2021	17	15	15
2020	17	15	15
2019	18	15	15
2018	18	15	15
2017	18	15	15
2016	17	15	15
2015	17	15	15

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Average Number of AP Courses

11 courses

15 courses

Average ACT score

(Out of 36)

Tuition and Acceptance Rate:

Average Yearly Tuition Cost

$7,834

$11,372

View Data

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

Tuition Cost Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	$12,169	$13,089	$15,012
2024	$11,983	$12,814	$14,622
2023	$11,732	$12,217	$14,057
2022	$11,100	$11,824	$13,504
2021	$10,979	$11,690	$13,232
2020	$10,822	$11,416	$12,915
2019	$10,666	$11,280	$12,656
2018	$10,624	$11,068	$12,363
2017	$10,592	$10,920	$12,049
2016	$10,560	$10,539	$11,633
2015	$9,682	$10,148	$11,174

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Average % on Financial Aid

21%

36%

View Data

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

Percent on Financial Aid Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	21%	36%	34%
2024	21%	36%	34%
2023	20%	36%	34%
2022	21%	35%	33%
2021	22%	35%	33%
2020	19%	34%	32%
2019	16%	33%	31%
2018	16%	33%	30%
2017	16%	32%	30%
2016	18%	33%	29%
2015	19%	34%	28%

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Average Financial Aid Grant

$1,346

$5,733

Average Acceptance Rate

93%

87%

View Data

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

Acceptance Rate Trends (2015-2025)
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	93%	85%	81%
2024	96%	89%	85%
2023	93%	89%	85%
2022	93%	88%	85%
2021	93%	88%	85%
2020	96%	88%	85%
2019	96%	87%	85%
2018	96%	88%	85%
2017	96%	88%	85%
2016	95%	89%	85%
2015	96%	89%	85%

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Students by Ethnicity:

0.49

0.55

View Data

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

Diversity Score Trends
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	0.49	0.55	0.65
2024	0.49	0.56	0.65
2023	0.49	0.54	0.65
2022	0.45	0.52	0.64
2021	0.43	0.52	0.64
2020	0.44	0.52	0.64
2019	0.44	0.50	0.63
2018	0.44	0.50	0.63
2017	0.40	0.46	0.61
2016	0.42	0.46	0.61
2015	0.40	0.45	0.61

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# American Indian Students

34 Students

283 Students

% American Indian Students

<1%

# Asian Students

207 Students

3,147 Students

% Asian Students

View Data

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

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

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# Hispanic Students

174 Students

5,325 Students

% Hispanic Students

View Data

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

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

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# Black Students

278 Students

7,603 Students

% Black Students

View Data

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

Black Student Percentage Trends
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	3%	6%	7%
2024	3%	7%	7%
2023	2%	7%	8%
2022	2%	6%	7%
2021	2%	7%	7%
2020	2%	7%	8%
2019	2%	7%	7%
2018	2%	7%	7%
2017	2%	7%	7%
2016	2%	7%	7%
2015	2%	7%	8%

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# White Students

7,258 Students

73,073 Students

% White Students

66%

62%

View Data

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

White Student Percentage Trends
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	66%	62%	52%
2024	66%	62%	52%
2023	67%	64%	52%
2022	70%	66%	54%
2021	72%	66%	54%
2020	72%	66%	54%
2019	71%	68%	56%
2018	71%	68%	56%
2017	75%	71%	58%
2016	73%	71%	58%
2015	75%	72%	58%

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# Hawaiian Students

19 Students

218 Students

% Hawaiian Students

<1%

# Others Students

3,024 Students

27,593 Students

% of Others Students

27%

24%

View Data

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

Other Races Student Percentage Trends
Year	St. Charles County Average	Missouri (MO) Average	National Average
2025	27%	23%	26%
2024	27%	23%	26%
2023	27%	23%	25%
2022	25%	21%	25%
2021	23%	21%	25%
2020	23%	21%	24%
2019	24%	19%	24%
2018	24%	19%	23%
2017	21%	18%	22%
2016	23%	17%	22%
2015	21%	16%	21%

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All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars

7 extracurriculars

10 extracurriculars

Average Number of Sports

8 sports

7 sports

Frequently Asked Questions

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

The private schools in St. Charles County, MO include Immanuel Lutheran School-Wentzville, St. Patrick Catholic School, and Assumption School.

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

44 private schools are located in St. Charles County.

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

The average tuition cost is $7,834, which is lower than the Missouri private school average tuition cost of $11,372.

How diverse are private schools in St. Charles County?

St. Charles County private schools are approximately 9% minority students, which is lower than the Missouri private school average of 21%.

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

16% of all K-12 students in St. Charles County are educated in private schools (compared to the MO state average of 12%).

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

67% of private schools in St. Charles County are religiously affiliated (most commonly Catholic and Lutheran Church Missouri Synod).

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

Popular comparisons of private schools in St. Charles County include: Mid Rivers SDA School vs. The Lead School, Duchesne High School vs. St. Dominic High School, St. Dominic High School vs. Duchesne High School

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