Private School Review - Established 2003
Immanuel Lutheran School-Wentzville
OakHaven Montessori School
The Goddard School

Best St. Charles County Private Schools (2026)

For the 2026 school year, there are 44 private schools serving 11,432 students in St. Charles County, MO (there are 93 public schools, serving 59,626 public students). 16% of all K-12 students are educated in private schools (compared to the MO state average of 12%).
The average tuition cost is $12,207, which is lower than the Missouri private school average tuition cost of $12,905.
67% of private schools in St. Charles County, MO are religiously affiliated (most commonly Catholic and Lutheran Church Missouri Synod).

Quick Facts (2026)

  • # Private Schools: 44
  • # Students Served: 11,432
  • Average Tuition: $12,207
  • % Students on Financial Aid: 21%
  • Acceptance Rate: 93%
  • Average Class Size: 17 students
  • % Students of Color: 9%
  • View St. Charles County, MO School Trends

Quick Facts (2026)

  • # Private Schools: 44
  • # Students Served: 11,432
  • Average Tuition: $12,207
  • % Students on Financial Aid: 21%
  • Acceptance Rate: 93%
  • Average Class Size: 17 students
  • % Students of Color: 9%
  • View St. Charles County, MO School Trends

Top Ranked St. Charles County Private Schools (2026)

Immanuel Lutheran School-Wentzville Photo
Immanuel Lutheran School-Wentzville
Gr: NS-8 | 548 students
Avg. class size: 22 students
Sports: 7 | Extracurriculars: 5
Lutheran Church Missouri Synod
632 E Hwy N
Wentzville, MO 63385
(636) 639-9887
(3)
View Profile
Academy Of The Sacred Heart Photo
Academy Of The Sacred Heart
Gr: K-8 | 195 students
Avg. class size: 13 students
Sports: 5 | Extracurriculars: 5
Catholic
619 N 2nd St
Saint Charles, MO 63301
(636) 946-6127
(9)
View Profile
All Saints School Photo
All Saints School
Gr: PK-8 | 210 students
Avg. class size: 15 students
Sports: 6 | Extracurriculars: 9
Catholic
5 Mcmenamy Rd
Saint Peters, MO 63376
(636) 397-1440
(2)
View Profile
Assumption School Photo
Assumption School
Gr: PK-8 | 431 students
Avg. class size: 20 students
Sports: 5 | Extracurriculars: 9
Catholic
203 W 3rd St
O Fallon, MO 63366
(636) 240-4474
View Profile
Child Of God Lutheran School Photo
Child Of God Lutheran School
Gr: NS-8 | 300 students
Avg. class size: 18 students
Sports: 6 | Extracurriculars: 6
Lutheran Church Missouri Synod
650 Salt Lick Rd
Saint Peters, MO 63376
(636) 970-7080
(2)
View Profile
Christian School District Photo
Christian School District
Gr: PK-12 | 546 students
Avg. class size: 15 students
Sports: 15
Christian
1145 Tom Ginnever Ave
O Fallon, MO 63366
(636) 978-1680
View Profile
Duchesne High School Photo
Duchesne High School
Gr: 9-12 | 286 students
Avg. class size: 14 students
Sports: 17 | Extracurriculars: 19
Catholic
2550 Elm Street
Saint Charles, MO 63301
(636) 946-6767
(11)
View Profile
Map of First Baptist Christian Academy
First Baptist Christian Academy
Gr: PK-6 | 277 students
Avg. class size: 13 students
Baptist
8750 Veterans Memorial Pkwy
O Fallon, MO 63366
(636) 272-3220
(2)
View Profile
Immaculate Conception School Photo
Immaculate Conception School
Gr: PK-8 | 877 students
Sports: 4 | Extracurriculars: 16
Catholic
2089 Hanley Road
O Fallon, MO 63368
(636) 561-4450
View Profile
Map of Immanuel Lutheran School
Immanuel Lutheran School
Gr: PK-8 | 535 students
Lutheran Church Missouri Synod
115 S 6th St
Saint Charles, MO 63301
(636) 946-0051
View Profile
Map of The Lead School
The Lead School
Gr: 1-12
Avg. class size: 8 students
Alternative School
1610 Willott Rd.
Saint Charles, MO 63376
(636) 447-5100
(1)
View Profile
Map of Lutheran High School Of St. Charles County
Lutheran High School Of St. Charles County
Gr: 9-12 | 439 students
Avg. class size: 15 students
Sports: 15 | Extracurriculars: 1
Lutheran Church Missouri Synod
5100 Mexico Rd
Saint Peters, MO 63376
(636) 928-5100
View Profile
Messiah Lutheran School Photo
Messiah Lutheran School
Gr: NS-8 | 347 students
Avg. class size: 19 students
Sports: 6 | Extracurriculars: 9
Lutheran Church Missouri Synod
5911 MO-94
Saint Charles, MO 63304
(636) 329-1096
(10)
View Profile
OakHaven Montessori School Photo
OakHaven Montessori School
Gr: PK-6 | 94 students
Avg. class size: 25 students
Sports: 3 | Extracurriculars: 6
Montessori School
7267 Highway N
O Fallon, MO 63368
(636) 978-4440
View Profile
Map of St. Charles Christian Home Educators
St. Charles Christian Home Educators
Gr: K-12 | 366 students
Avg. class size: 10 students
Extracurriculars: 2
Specialized Curriculum (Christian)
709 Crestview Drive
O Fallon, MO 63366
(636) 240-4412
View Profile
Map of St. Dominic High School
St. Dominic High School
Gr: 9-12 | 927 students
Avg. class size: 24 students
Sports: 14 | Extracurriculars: 6
Catholic
31 Saint Dominic Dr
O Fallon, MO 63366
(636) 240-8303
View Profile
St. Joseph School Photo
St. Joseph School
Gr: PK-8 | 991 students
Sports: 8 | Extracurriculars: 4
Catholic
1351 Motherhead Rd
Saint Charles, MO 63304
(636) 441-0055
View Profile
Map of St. Patrick School
St. Patrick School
Gr: PK-8 | 467 students
Avg. class size: 20 students
Catholic
701 S Church St
Wentzville, MO 63385
(636) 332-9913
View Profile
St. Theodore School Photo
St. Theodore School
Gr: PK-8 | 297 students
Avg. class size: 19 students
Extracurriculars: 6
Catholic
5059 Highway P
Wentzville, MO 63385
(636) 639-1385
(2)
View Profile
Veritas Christian Academy Photo
Veritas Christian Academy
Gr: NS-12 | 664 students
Avg. class size: 15 students
Sports: 14 | Extracurriculars: 15
Christian
1145 Tom Ginnever Ave
O Fallon, MO 63366
(636) 978-1680
View Profile
Show 9 more private schools in St. Charles County, MO (out of 44 total schools)
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Overview

Category
This State (MO)
US
# Schools
45 Schools

Trends in Total Number of Private Schools

YearSt. Charles County Total Schools
202544
202445
202343
202244
202145
202049
201950
201850
201748
201647
201545
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# Students
11,432 Students
119,577 Students

Trends in the Average Number of Students Per Private School

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025300194179
2024300190172
2023288185174
2022285196185
2021278192180
2020269183171
2019290184175
2018293183172
2017289190180
2016274188178
2015288180167
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% Average Students of Color
9%
21%

Percentage of Students of Color Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
20258%20%34%
20248%21%34%
20239%20%33%
20228%18%33%
20217%18%32%
20206%19%32%
20197%18%31%
20187%18%31%
201719%21%32%
201614%21%32%
201514%20%32%
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Academics and Faculty:

# Teachers
774 Teachers
9,941 Teachers
Average Student-Teacher Ratio
15:1
12:1

Student-Teacher Ratio Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202516:112:111:1
202416:112:111:1
202314:113:111:1
202214:113:111:1
202114:113:111:1
202016:113:112:1
201915:112:112:1
201815:113:112:1
201715:112:112:1
201615:112:112:1
201516:112:112:1
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% Average Faculty w/Advanced Degree
57%
56%

Percentage of Faculty With Advanced Degrees Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202557%56%55%
202457%55%54%
202361%55%54%
202260%55%54%
202158%55%54%
202065%56%54%
201963%54%53%
201863%53%53%
201763%53%53%
201660%51%52%
201560%50%52%
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Average Class Size
17 students
16 students

Class Size Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025171615
2024171515
2023171515
2022171515
2021171515
2020171515
2019181515
2018181515
2017181515
2016171515
2015171515
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Average Number of AP Courses
11 courses
15 courses

Trends in Average Number of AP Courses Offered

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025111513
2024121412
2023141311
2022121411
2021141511
2020141511
2019121411
2018131311
2017131310
2016101210
201571010
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Average ACT score
25
(Out of 36)
26

ACT Score Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025252626
2024252626
2023242626
2022242626
2021252626
2020242625
2019252625
2018252625
2017252625
2016242525
2015252525
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Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$12,207
$12,905

Tuition Cost Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025$12,169$13,089$15,012
2024$8,103$11,380$13,254
2023$7,805$10,498$12,626
2022$7,271$10,411$12,187
2021$7,193$10,172$11,800
2020$6,810$10,089$11,512
2019$6,182$9,711$11,293
2018$6,157$9,659$11,017
2017$6,139$9,528$10,708
2016$5,682$8,608$10,356
2015$6,229$9,126$9,939
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Average % on Financial Aid
21%
36%

Percent on Financial Aid Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202521%36%34%
202421%36%34%
202320%36%34%
202221%35%33%
202122%35%33%
202019%34%32%
201916%33%31%
201816%33%30%
201716%32%30%
201618%33%29%
201519%34%28%
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Average Financial Aid Grant
$1,346
$5,896

Financial Aid Grant Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
2025$1,346$6,130$7,073
2024$1,346$6,030$6,930
2023$1,738$4,774$6,469
2022$1,396$4,778$6,289
2021$453$7,188$6,055
2020$875$7,387$5,921
2019$775$7,583$5,795
2018$775$7,540$5,456
2017$775$7,202$5,319
2016$775$7,471$5,105
2015$1,125$8,065$5,030
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Average Acceptance Rate
93%
86%

Acceptance Rate Trends (2015-2025)

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202593%85%81%
202496%89%85%
202393%89%85%
202293%88%85%
202193%88%85%
202096%88%85%
201996%87%85%
201896%88%85%
201796%88%85%
201695%89%85%
201596%89%85%
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Average Endowment Size
$50 million
$24.88 million

Students by Ethnicity:

0.49
0.55

Diversity Score Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
20250.490.550.65
20240.490.560.65
20230.490.540.65
20220.450.520.64
20210.430.520.64
20200.440.520.64
20190.440.500.63
20180.440.500.63
20170.400.460.61
20160.420.460.61
20150.400.450.61
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# American Indian Students
34 Students
283 Students
% American Indian Students
n/a
n/a
# Asian Students
207 Students
3,147 Students
% Asian Students
2%
3%

Asian Student Percentage Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
20252%4%5%
20242%4%5%
20233%3%5%
20222%4%4%
20212%3%4%
20202%3%4%
20192%3%4%
20182%3%4%
20171%2%4%
20161%3%4%
20151%3%4%
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# Hispanic Students
174 Students
5,325 Students
% Hispanic Students
2%
5%

Hispanic Student Percentage Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
20252%5%9%
20242%4%9%
20231%3%9%
20221%3%8%
20211%3%9%
20201%3%9%
20191%3%8%
20181%3%8%
20171%2%8%
20161%2%8%
20151%2%8%
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# Black Students
278 Students
7,603 Students
% Black Students
3%
6%

Black Student Percentage Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
20253%6%7%
20243%7%7%
20232%7%8%
20222%6%7%
20212%7%7%
20202%7%8%
20192%7%7%
20182%7%7%
20172%7%7%
20162%7%7%
20152%7%8%
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# White Students
7,258 Students
73,073 Students
% White Students
66%
62%

White Student Percentage Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202566%62%52%
202466%62%52%
202367%64%52%
202270%66%54%
202172%66%54%
202072%66%54%
201971%68%56%
201871%68%56%
201775%71%58%
201673%71%58%
201575%72%58%
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# Hawaiian Students
19 Students
218 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
2,993 Students
27,543 Students
% of Others Students
27%
24%

Other Races Student Percentage Trends

YearSt. Charles County AverageMissouri (MO) AverageNational Average
202527%23%26%
202427%23%26%
202327%23%25%
202225%21%25%
202123%21%25%
202023%21%24%
201924%19%24%
201824%19%23%
201721%18%22%
201623%17%22%
201521%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 top ranked private schools in St. Charles County, MO include Assumption School, Immanuel Lutheran School-Wentzville, and Duchesne High 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 $12,207, which is lower than the Missouri private school average tuition cost of $12,905.
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?

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