32 Private Schools in St. Charles County, MO

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School	City	Grades	Students	Per teacher	Affiliation
Immaculate Conception School	Dardenne Prairie	PreK-8	715	19.2	Roman Catholic
Oakhaven Montessori School	Dardenne Prairie	PreK-6	34	7.9	Nonsectarian
Andrews Academy	Lake Saint Louis	K-8	123	4.7	Nonsectarian
Hope Montessori Academy, Lake St. Louis	Lake Saint Louis	PreK-K	8	8	Nonsectarian
Lafayette Academy	Lake Saint Louis	K-12	77	6.3	Nonsectarian
STEM and Bloom Academy	Lake Saint Louis	PreK-1	1	not reported	Nonsectarian
Assumption Catholic School	O'Fallon	PreK-8	374	13.7	Roman Catholic
Christian School District	O'Fallon	PreK-12	596	13.4	Christian (nondenominational)
First Baptist Christian Academy	O'Fallon	PreK-8	163	10.8	Baptist
Future Apostle Academy	O'Fallon	PreK-9	12	2	Christian (nondenominational)
St. Dominic High School	O'Fallon	9-12	1,087	16.7	Roman Catholic
Trinity Christian Academy	OFallon	Not in the federal survey
Academy of the Sacred Heart	Saint Charles	PreK-8	164	9.9	Roman Catholic
Duchesne High School	Saint Charles	9-12	225	8.2	Roman Catholic
Immanuel Lutheran School	Saint Charles	PreK-8	366	12.8	Lutheran Church (Missouri Synod)
Seton Regional Catholic School	Saint Charles	PreK-8	248	16.4	Roman Catholic
St. Cletus School	Saint Charles	PreK-8	176	9.5	Roman Catholic
St. John Paul II Preparatory	Saint Charles	PreK-12	176	7	Roman Catholic
St. Joseph School	Saint Charles	PreK-8	891	19.8	Roman Catholic
Sts Joachim & Ann School	Saint Charles	PreK-8	155	11.9	Roman Catholic
Trinity Lutheran School	Saint Charles	K-8	23	7	Lutheran Church (Missouri Synod)
Zion Lutheran School	Saint Charles	PreK-8	364	18.3	Lutheran Church (Missouri Synod)
St. Paul Elementary School	Saint Paul	PreK-8	222	19.1	Roman Catholic
All Saints School	Saint Peters	PreK-8	125	7.1	Roman Catholic
Child of God Lutheran School	Saint Peters	PreK-8	139	12.9	Lutheran Church (Missouri Synod)
Childrens Edu-Care Center	Saint Peters	PreK-K	6	3	Nonsectarian
Lutheran High School of St. Charles County	Saint Peters	9-12	460	15.3	Lutheran Church (Missouri Synod)
Messiah Lutheran School	Weldon Spring	Not in the federal survey
Immanuel Lutheran School	Wentzville	K-8	385	14.5	Lutheran Church (Missouri Synod)
St. Joseph School-Josephville	Wentzville	PreK-8	79	9	Roman Catholic
St. Patrick School	Wentzville	PreK-8	436	16.5	Roman Catholic
St. Theodore School	Wentzville	PreK-8	260	15.5	Roman Catholic

St. Charles County private schools at a glance

Towns: 9; the most in Saint Charles (10), O'Fallon (5) and Lake Saint Louis (4)
Among Missouri counties: 3rd most private schools of 82; 6% of the state’s 514
Typical school: 222 students (27 reporting)
Smallest and largest: Future Apostle Academy, 12 students; St. Dominic High School, 1,087 students
Students per teacher: 11.9 typical, 2 to 19.8 across 29 schools
Programs: 3 Montessori
Association members: 15, most often the National Catholic Educational Association
To a 4-year college: 80% of graduates at the typical high school (5 reporting)
State program: Tax-credit scholarship, up to $7,145 per student for 2026-27, more for some students
How MOScholars works

Affiliation, 32 schools

Catholic15
Christian, not Catholic9
Nonsectarian6
Not in federal survey2

Grade levels (overlapping), 32 schools

Pre-K (and up)23
Elementary (K to 5)27
Middle (6 to 8)24
High school (9 to 12)7
K to 12, one school3

School size, 27 reporting

Under 503
50 to 1495
150 to 2999
300 to 5997
600 or more3

Lowest published tuition, 5 schools

Lowest$6,940Middle$9,060Highest$13,552

Where these facts come from

Grades, size, affiliation, co-ed, membership, college-going: NCES Private School Universe Survey 2023-24, downloaded September 20, 2026.
Award and rules: MOScholars, official page, read October 7, 2026.
Tuition for 5 schools: each school’s own website, last read October 5, 2026.

Cities in and around St. Charles County

Neighboring counties

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