Assumption School Photo - For 154 years, Assumption School has been a beacon of faith and learning in O'Fallon, and we are proud to continue that tradition with 465+ students enrolled this year in preschool through 8th grade! If you are you looking for a school that combines rigorous academics, cutting-edge technology, and a faith-based education, this is the place to be!

Best St. Charles County Private Schools (2026)

For the 2026 school year, there are 43 private schools serving 11,416 students in St. Charles County, MO (there are 93 public schools, serving 59,626 public students). 16% of all K-12 students in St.
Charles County, MO are educated in private schools (compared to the MO state average of 12%).
The top-ranked private schools in St. Charles County, MO include Immanuel Lutheran School-Wentzville, St. Patrick School, and Assumption School.
The average tuition cost is $12,169, which is lower than the Missouri private school average tuition cost of $12,778.
68% of private schools in St. Charles County, MO are religiously affiliated (most commonly Catholic and Lutheran Church Missouri Synod).

Top-Ranked St. Charles County Private Schools (2026)

School
Location
Quick Facts
Immanuel Lutheran School-Wentzville
Immanuel Lutheran School-Wentzville Photo - Immanuel Lutheran School-Wentzville, MO
(Lutheran Church Missouri Synod)
(3)
632 E Hwy N
Wentzville, MO 63385
(636) 639-9887
Gr: NS-8 | 548 students Avg. class size: 22 students Sports: 7 | Extracurrculars: 5 Tuition listed
Academy Of The Sacred Heart
Academy Of The Sacred Heart Photo
(Catholic)
(9)
619 N 2nd St
Saint Charles, MO 63301
(636) 946-6127
Gr: K-8 | 195 students Avg. class size: 13 students Sports: 5 | Extracurrculars: 5 Tuition listed
All Saints School
All Saints School Photo - Grandparents and students celebrate together at Mass.
(Catholic)
(2)
5 Mcmenamy Rd
Saint Peters, MO 63376
(636) 397-1440
Gr: PK-8 | 210 students Avg. class size: 15 students Sports: 6 | Extracurrculars: 9 Tuition listed
Assumption School
Assumption School Photo - For 154 years, Assumption School has been a beacon of faith and learning in O'Fallon, and we are proud to continue that tradition with 465+ students enrolled this year in preschool through 8th grade! If you are you looking for a school that combines rigorous academics, cutting-edge technology, and a faith-based education, this is the place to be!
(Catholic)
203 W 3rd St
O Fallon, MO 63366
(636) 240-4474
Gr: PK-8 | 431 students Avg. class size: 20 students Sports: 5 | Extracurrculars: 9 Tuition & acceptance rate listed
Child Of God Lutheran School
Child Of God Lutheran School Photo
(Lutheran Church Missouri Synod)
(2)
650 Salt Lick Rd
Saint Peters, MO 63376
(636) 970-7080
Gr: NS-8 | 300 students Avg. class size: 18 students Sports: 6 | Extracurrculars: 6 Tuition & acceptance rate listed
Christian School District
Christian School District Photo
(Christian)
1145 Tom Ginnever Ave
O Fallon, MO 63366
(636) 978-1680
Gr: PK-12 | 546 students Avg. class size: 15 students Sports: 15 Tuition & acceptance rate listed
Duchesne High School
Duchesne High School Photo
(Catholic)
(9)
2550 Elm Street
Saint Charles, MO 63301
(636) 946-6767
Gr: 9-12 | 248 students Avg. class size: 13 students Sports: 14 | Extracurrculars: 19 Tuition & acceptance rate listed
First Baptist Christian Academy
(Baptist)
(2)
8750 Veterans Memorial Pkwy
O Fallon, MO 63366
(636) 272-3220
Gr: PK-6 | 277 students Avg. class size: 13 students Tuition & acceptance rate listed
Immaculate Conception School
Immaculate Conception School Photo - Our School Front
(Catholic)
2089 Hanley Road
O Fallon, MO 63368
(636) 561-4450
Gr: PK-8 | 877 students Sports: 4 | Extracurrculars: 16 Tuition listed
Immanuel Lutheran School
(Lutheran Church Missouri Synod)
115 S 6th St
Saint Charles, MO 63301
(636) 946-0051
Gr: PK-8 | 535 students
The Lead School
Alternative School
(1)
1610 Willott Rd.
Saint Charles, MO 63376
(636) 447-5100
Gr: 1-12 Avg. class size: 8 students
Lutheran High School Of St. Charles County
(Lutheran Church Missouri Synod)
5100 Mexico Rd
Saint Peters, MO 63376
(636) 928-5100
Gr: 9-12 | 439 students Avg. class size: 15 students Sports: 15 | Extracurrculars: 1 Acceptance rate listed
Messiah Lutheran School
Messiah Lutheran School Photo
(Lutheran Church Missouri Synod)
(10)
5911 MO-94
Saint Charles, MO 63304
(636) 329-1096
Gr: NS-8 | 347 students Avg. class size: 19 students Sports: 6 | Extracurrculars: 9 Tuition & acceptance rate listed
OakHaven Montessori School
OakHaven Montessori School Photo
Montessori School
7267 Highway N
O Fallon, MO 63368
(636) 978-4440
Gr: PK-6 | 94 students Avg. class size: 25 students Sports: 3 | Extracurrculars: 6 Tuition listed
St. Charles Christian Home Educators
Special Program Emphasis (Christian)
709 Crestview Drive
O Fallon, MO 63366
(636) 240-4412
Gr: K-12 | 388 students Avg. class size: 7 students Extracurrculars: 2 Tuition listed
St. Dominic High School
(Catholic)
31 Saint Dominic Dr
O Fallon, MO 63366
(636) 240-8303
Gr: 9-12 | 927 students Avg. class size: 24 students Sports: 14 | Extracurrculars: 6 Tuition & acceptance rate listed
St. Joseph School
St. Joseph School Photo
(Catholic)
1351 Motherhead Rd
Saint Charles, MO 63304
(636) 441-0055
Gr: PK-8 | 991 students Sports: 8 | Extracurrculars: 4
St. Patrick School
(Catholic)
701 S Church St
Wentzville, MO 63385
(636) 332-9913
Gr: PK-8 | 467 students Avg. class size: 20 students Tuition & acceptance rate listed
St. Theodore School
St. Theodore School Photo - St. Theodore School
(Catholic)
(2)
5059 Highway P
Wentzville, MO 63385
(636) 639-1385
Gr: PK-8 | 297 students Avg. class size: 19 students Extracurrculars: 6 Tuition listed
Veritas Christian Academy
Veritas Christian Academy Photo
(Christian)
1145 Tom Ginnever Ave
O Fallon, MO 63366
(636) 978-1680
Gr: NS-12 | 664 students Avg. class size: 15 students Sports: 14 | Extracurrculars: 15 Tuition & acceptance rate listed
Zion Lutheran School
(Lutheran Church Missouri Synod)
3866 S Old Highway 94
Saint Charles, MO 63304
(636) 441-7424
Gr: PK-8 | 557 students
1701 Feise Road
Saint Charles, MO 63301
(636) 561-7709
Gr: K-6 | 134 students Avg. class size: 12 students Tuition listed
Childrens Edu-care Center Inc.
Montessori School
100 Vantage Drive
Saint Peters, MO 63376
(636) 397-4090
Gr: PK-K | 18 students Avg. class size: 25 students Sports: 2 Tuition & acceptance rate listed
Church On The Rock Christian
(Christian)
900 Birdie Hills Rd
Saint Peters, MO 63376
(636) 240-7775
Gr: PK-12 | 138 students
The Goddard School
The Goddard School Photo
Daycare / Preschool
9008 Phoenix Parkway
O Fallon, MO 63368
(636) 561-8559
Gr: PK-K | 44 students
The Goddard School
The Goddard School Photo
Daycare / Preschool
1402 Gettysburg Landing Road
Saint Charles, MO 63303
(636) 441-9037
Gr: NS-K Avg. class size: 15 students
The Goddard School
The Goddard School Photo
Daycare / Preschool
700 Old Salt Lick Road
Saint Peters, MO 63376
(636) 397-0399
Gr: NS | 130 students
The Goddard School
The Goddard School Photo
Daycare / Preschool
1513 Wentzville Parkway
Wentzville, MO 63385
(636) 327-5991
Gr: NS-PK
Hope Montessori Academy - Lake St. Louis
Montessori School
1799 Lake Saint Louis Blvd
Lake Saint Louis, MO 63367
(636) 561-2811
Gr: K | 7 students
Kid's Academy
Daycare / Preschool
7767 Highway N
O Fallon, MO 63366
(636) 561-8697
Gr: 5-8
Linc Family Learning Center
Daycare / Preschool (Christian)
9 Love Park Ln
Wentzville, MO 63385
(636) 332-5127
Gr: K | 7 students
Little Guppy Child Dev Center
Daycare / Preschool
3151 Elm Pointe Industrial Dr
Saint Charles, MO 63301
(636) 916-4280
Gr: NS-PK | 164 students
Mid Rivers SDA School
(Seventh Day Adventist)
600 Salt Lick Rd
Saint Peters, MO 63376
(636) 397-8294
Gr: 3-8 | 7 students
North St. Peters KinderCare
North St. Peters KinderCare Photo - Lobby
Daycare / Preschool
4150 S. Cloverleaf Dr.
Saint Peters, MO 63376
(636) 928-5711
Gr: NS-PK Tuition listed
St. Charles Borromeo School
(Catholic)
431 Decatur St
Saint Charles, MO 63301
(636) 946-2713
Gr: K-8 | 198 students Avg. class size: 22 students Tuition & acceptance rate listed
Show 8 more private schools in St. Charles County, MO (out of 43 total schools)
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Overview

This County (St. Charles County)
This State (MO)
# Schools
44 Schools

Student Body:

# Students
11,416 Students
120,038 Students
% Average Students of Color
8%
20%

Academics and Faculty:

# Teachers
760 Teachers
9,947 Teachers
Average Student-Teacher Ratio
16:1
12:1
% Average Faculty w/Advanced Degree
57%
56%
Average Class Size
17 students
16 students
Average Number of AP Courses
11 courses
15 courses
Average ACT score
25
(Out of 36)
26

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$12,169
$12,778
Average % on Financial Aid
21%
36%
Average Financial Aid Grant
$1,346
$6,130
Average Acceptance Rate
93%
86%
Average Endowment Size
$50 million
$23.69 million

Students by Ethnicity:

0.49
0.55
# American Indian Students
34 Students
284 Students
% American Indian Students
n/a
n/a
# Asian Students
207 Students
3,152 Students
% Asian Students
2%
3%
# Hispanic Students
174 Students
5,342 Students
% Hispanic Students
2%
5%
# Black Students
278 Students
7,611 Students
% Black Students
3%
7%
# White Students
7,258 Students
73,272 Students
% White Students
66%
62%
# 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
27,448 Students
% of Others Students
27%
23%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
7 extracurriculars
9 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 Immanuel Lutheran School-Wentzville, St. Patrick School, and Assumption School.
How many private schools are located in St. Charles County?
43 private schools are located in St. Charles County.
How much do private schools cost in St. Charles County?
The average tuition cost is $12,169, which is lower than the Missouri private school average tuition cost of $12,778.
How diverse are private schools in St. Charles County?
St. Charles County private schools are approximately 8% minority students, which is lower than the Missouri private school average of 20%.
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?
68% 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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