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Private schools in St. Charles County, MO

30 schools across Dardenne Prairie, Lake Saint Louis, O'Fallon, Saint Charles and other towns. About 8,090 students in all (2023-24).

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 1 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
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 Inc. 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)
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

On the state’s official list Other private schools

What Missouri pays

MO
MOScholars Tax-credit scholarship
A scholarship set each year by the State Treasurer We could not verify the 2026-27 per-student figure and will not guess it.

Figures read from each program’s official pages, 2026-09-20. Sources and how to apply

Cities in and around St. Charles County

Neighboring counties

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